0

Roll abseil_revision 592924480a..fbdff6f3ae

Change Log:
592924480a..fbdff6f3ae
Full diff:
592924480a..fbdff6f3ae

Bug: None
Change-Id: Ice6915c8eeeb95fd17d36a2dd20964d3ed7904b7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2580063
Reviewed-by: Mirko Bonadei <mbonadei@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@google.com>
Commit-Queue: Danil Chapovalov <danilchap@chromium.org>
Cr-Commit-Position: refs/heads/master@{#835258}
This commit is contained in:
Danil Chapovalov
2020-12-09 18:20:16 +00:00
committed by Chromium LUCI CQ
parent 6a266f4ff2
commit 7bc42a7ed1
21 changed files with 1624 additions and 104 deletions

@ -618,7 +618,8 @@ _BANNED_CPP_FUNCTIONS = (
're2::RE2 instead (crbug.com/755321)',
),
True,
(),
# Abseil's benchmarks never linked into chrome.
['third_party/abseil-cpp/.*_benchmark.cc'],
),
(
r'/\bstd::stoi\b',

@ -4,7 +4,7 @@ URL: https://github.com/abseil/abseil-cpp
License: Apache 2.0
License File: LICENSE
Version: 0
Revision: 592924480acf034aec0454160492a20bccdbdf3e
Revision: fbdff6f3ae0ba977a69f172e85ecaede535e70f6
Security Critical: yes
Description:

@ -29,9 +29,9 @@ http_archive(
# Google benchmark.
http_archive(
name = "com_github_google_benchmark",
urls = ["https://github.com/google/benchmark/archive/16703ff83c1ae6d53e5155df3bb3ab0bc96083be.zip"],
strip_prefix = "benchmark-16703ff83c1ae6d53e5155df3bb3ab0bc96083be",
sha256 = "59f918c8ccd4d74b6ac43484467b500f1d64b40cc1010daa055375b322a43ba3",
urls = ["https://github.com/google/benchmark/archive/bf585a2789e30585b4e3ce6baf11ef2750b54677.zip"], # 2020-11-26T11:14:03Z
strip_prefix = "benchmark-bf585a2789e30585b4e3ce6baf11ef2750b54677",
sha256 = "2a778d821997df7d8646c9c59b8edb9a573a6e04c534c01892a40aa524a7b68c",
)
# C++ rules for Bazel.

@ -630,6 +630,45 @@ cc_test(
],
)
cc_binary(
name = "raw_hash_set_benchmark",
testonly = 1,
srcs = ["internal/raw_hash_set_benchmark.cc"],
copts = ABSL_TEST_COPTS,
linkopts = ABSL_DEFAULT_LINKOPTS,
tags = ["benchmark"],
visibility = ["//visibility:private"],
deps = [
":hash_function_defaults",
":raw_hash_set",
"//absl/base:raw_logging_internal",
"//absl/strings:str_format",
"@com_github_google_benchmark//:benchmark_main",
],
)
cc_binary(
name = "raw_hash_set_probe_benchmark",
testonly = 1,
srcs = ["internal/raw_hash_set_probe_benchmark.cc"],
copts = ABSL_TEST_COPTS,
linkopts = select({
"//conditions:default": [],
}) + ABSL_DEFAULT_LINKOPTS,
tags = ["benchmark"],
visibility = ["//visibility:private"],
deps = [
":flat_hash_map",
":hash_function_defaults",
":hashtable_debug",
":raw_hash_set",
"//absl/random",
"//absl/random:distributions",
"//absl/strings",
"//absl/strings:str_format",
],
)
cc_test(
name = "raw_hash_set_allocator_test",
size = "small",
@ -677,6 +716,22 @@ cc_test(
],
)
cc_binary(
name = "layout_benchmark",
testonly = 1,
srcs = ["internal/layout_benchmark.cc"],
copts = ABSL_TEST_COPTS,
linkopts = ABSL_DEFAULT_LINKOPTS,
tags = ["benchmark"],
visibility = ["//visibility:private"],
deps = [
":layout",
"//absl/base:core_headers",
"//absl/base:raw_logging_internal",
"@com_github_google_benchmark//:benchmark_main",
],
)
cc_library(
name = "tracked",
testonly = 1,

@ -910,6 +910,7 @@ struct btree_iterator {
using key_type = typename Node::key_type;
using size_type = typename Node::size_type;
using params_type = typename Node::params_type;
using is_map_container = typename params_type::is_map_container;
using node_type = Node;
using normal_node = typename std::remove_const<Node>::type;
@ -921,7 +922,7 @@ struct btree_iterator {
using slot_type = typename params_type::slot_type;
using iterator =
btree_iterator<normal_node, normal_reference, normal_pointer>;
btree_iterator<normal_node, normal_reference, normal_pointer>;
using const_iterator =
btree_iterator<const_node, const_reference, const_pointer>;
@ -938,20 +939,19 @@ struct btree_iterator {
btree_iterator(Node *n, int p) : node(n), position(p) {}
// NOTE: this SFINAE allows for implicit conversions from iterator to
// const_iterator, but it specifically avoids defining copy constructors so
// that btree_iterator can be trivially copyable. This is for performance and
// binary size reasons.
// const_iterator, but it specifically avoids hiding the copy constructor so
// that the trivial one will be used when possible.
template <typename N, typename R, typename P,
absl::enable_if_t<
std::is_same<btree_iterator<N, R, P>, iterator>::value &&
std::is_same<btree_iterator, const_iterator>::value,
int> = 0>
btree_iterator(const btree_iterator<N, R, P> &other) // NOLINT
btree_iterator(const btree_iterator<N, R, P> other) // NOLINT
: node(other.node), position(other.position) {}
private:
// This SFINAE allows explicit conversions from const_iterator to
// iterator, but also avoids defining a copy constructor.
// iterator, but also avoids hiding the copy constructor.
// NOTE: the const_cast is safe because this constructor is only called by
// non-const methods and the container owns the nodes.
template <typename N, typename R, typename P,
@ -959,7 +959,7 @@ struct btree_iterator {
std::is_same<btree_iterator<N, R, P>, const_iterator>::value &&
std::is_same<btree_iterator, iterator>::value,
int> = 0>
explicit btree_iterator(const btree_iterator<N, R, P> &other)
explicit btree_iterator(const btree_iterator<N, R, P> other)
: node(const_cast<node_type *>(other.node)), position(other.position) {}
// Increment/decrement the iterator.
@ -1022,6 +1022,8 @@ struct btree_iterator {
}
private:
friend iterator;
friend const_iterator;
template <typename Params>
friend class btree;
template <typename Tree>
@ -1032,8 +1034,6 @@ struct btree_iterator {
friend class btree_map_container;
template <typename Tree>
friend class btree_multiset_container;
template <typename N, typename R, typename P>
friend struct btree_iterator;
template <typename TreeType, typename CheckerType>
friend class base_checker;
@ -1122,7 +1122,8 @@ class btree {
using const_reference = typename Params::const_reference;
using pointer = typename Params::pointer;
using const_pointer = typename Params::const_pointer;
using iterator = btree_iterator<node_type, reference, pointer>;
using iterator =
typename btree_iterator<node_type, reference, pointer>::iterator;
using const_iterator = typename iterator::const_iterator;
using reverse_iterator = std::reverse_iterator<iterator>;
using const_reverse_iterator = std::reverse_iterator<const_iterator>;
@ -1135,7 +1136,11 @@ class btree {
private:
// For use in copy_or_move_values_in_order.
const value_type &maybe_move_from_iterator(const_iterator it) { return *it; }
value_type &&maybe_move_from_iterator(iterator it) { return std::move(*it); }
value_type &&maybe_move_from_iterator(iterator it) {
// This is a destructive operation on the other container so it's safe for
// us to const_cast and move from the keys here even if it's a set.
return std::move(const_cast<value_type &>(*it));
}
// Copies or moves (depending on the template parameter) the values in
// other into this btree in their order in other. This btree must be empty

@ -298,9 +298,10 @@ class Storage {
// Storage Constructors and Destructor
// ---------------------------------------------------------------------------
Storage() : metadata_() {}
Storage() : metadata_(allocator_type(), /* size and is_allocated */ 0) {}
explicit Storage(const allocator_type& alloc) : metadata_(alloc, {}) {}
explicit Storage(const allocator_type& alloc)
: metadata_(alloc, /* size and is_allocated */ 0) {}
~Storage() {
pointer data = GetIsAllocated() ? GetAllocatedData() : GetInlinedData();

@ -0,0 +1,122 @@
// Copyright 2018 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Every benchmark should have the same performance as the corresponding
// headroom benchmark.
#include "absl/base/internal/raw_logging.h"
#include "absl/container/internal/layout.h"
#include "benchmark/benchmark.h"
namespace absl {
ABSL_NAMESPACE_BEGIN
namespace container_internal {
namespace {
using ::benchmark::DoNotOptimize;
using Int128 = int64_t[2];
// This benchmark provides the upper bound on performance for BM_OffsetConstant.
template <size_t Offset, class... Ts>
void BM_OffsetConstantHeadroom(benchmark::State& state) {
for (auto _ : state) {
DoNotOptimize(Offset);
}
}
template <size_t Offset, class... Ts>
void BM_OffsetConstant(benchmark::State& state) {
using L = Layout<Ts...>;
ABSL_RAW_CHECK(L::Partial(3, 5, 7).template Offset<3>() == Offset,
"Invalid offset");
for (auto _ : state) {
DoNotOptimize(L::Partial(3, 5, 7).template Offset<3>());
}
}
template <class... Ts>
size_t VariableOffset(size_t n, size_t m, size_t k);
template <>
size_t VariableOffset<int8_t, int16_t, int32_t, Int128>(size_t n, size_t m,
size_t k) {
auto Align = [](size_t n, size_t m) { return (n + m - 1) & ~(m - 1); };
return Align(Align(Align(n * 1, 2) + m * 2, 4) + k * 4, 8);
}
template <>
size_t VariableOffset<Int128, int32_t, int16_t, int8_t>(size_t n, size_t m,
size_t k) {
// No alignment is necessary.
return n * 16 + m * 4 + k * 2;
}
// This benchmark provides the upper bound on performance for BM_OffsetVariable.
template <size_t Offset, class... Ts>
void BM_OffsetVariableHeadroom(benchmark::State& state) {
size_t n = 3;
size_t m = 5;
size_t k = 7;
ABSL_RAW_CHECK(VariableOffset<Ts...>(n, m, k) == Offset, "Invalid offset");
for (auto _ : state) {
DoNotOptimize(n);
DoNotOptimize(m);
DoNotOptimize(k);
DoNotOptimize(VariableOffset<Ts...>(n, m, k));
}
}
template <size_t Offset, class... Ts>
void BM_OffsetVariable(benchmark::State& state) {
using L = Layout<Ts...>;
size_t n = 3;
size_t m = 5;
size_t k = 7;
ABSL_RAW_CHECK(L::Partial(n, m, k).template Offset<3>() == Offset,
"Inavlid offset");
for (auto _ : state) {
DoNotOptimize(n);
DoNotOptimize(m);
DoNotOptimize(k);
DoNotOptimize(L::Partial(n, m, k).template Offset<3>());
}
}
// Run all benchmarks in two modes:
//
// Layout with padding: int8_t[3], int16_t[5], int32_t[7], Int128[?].
// Layout without padding: Int128[3], int32_t[5], int16_t[7], int8_t[?].
#define OFFSET_BENCHMARK(NAME, OFFSET, T1, T2, T3, T4) \
auto& NAME##_##OFFSET##_##T1##_##T2##_##T3##_##T4 = \
NAME<OFFSET, T1, T2, T3, T4>; \
BENCHMARK(NAME##_##OFFSET##_##T1##_##T2##_##T3##_##T4)
OFFSET_BENCHMARK(BM_OffsetConstantHeadroom, 48, int8_t, int16_t, int32_t,
Int128);
OFFSET_BENCHMARK(BM_OffsetConstant, 48, int8_t, int16_t, int32_t, Int128);
OFFSET_BENCHMARK(BM_OffsetConstantHeadroom, 82, Int128, int32_t, int16_t,
int8_t);
OFFSET_BENCHMARK(BM_OffsetConstant, 82, Int128, int32_t, int16_t, int8_t);
OFFSET_BENCHMARK(BM_OffsetVariableHeadroom, 48, int8_t, int16_t, int32_t,
Int128);
OFFSET_BENCHMARK(BM_OffsetVariable, 48, int8_t, int16_t, int32_t, Int128);
OFFSET_BENCHMARK(BM_OffsetVariableHeadroom, 82, Int128, int32_t, int16_t,
int8_t);
OFFSET_BENCHMARK(BM_OffsetVariable, 82, Int128, int32_t, int16_t, int8_t);
} // namespace
} // namespace container_internal
ABSL_NAMESPACE_END
} // namespace absl

@ -0,0 +1,396 @@
// Copyright 2018 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "absl/container/internal/raw_hash_set.h"
#include <numeric>
#include <random>
#include "absl/base/internal/raw_logging.h"
#include "absl/container/internal/hash_function_defaults.h"
#include "absl/strings/str_format.h"
#include "benchmark/benchmark.h"
namespace absl {
ABSL_NAMESPACE_BEGIN
namespace container_internal {
struct RawHashSetTestOnlyAccess {
template <typename C>
static auto GetSlots(const C& c) -> decltype(c.slots_) {
return c.slots_;
}
};
namespace {
struct IntPolicy {
using slot_type = int64_t;
using key_type = int64_t;
using init_type = int64_t;
static void construct(void*, int64_t* slot, int64_t v) { *slot = v; }
static void destroy(void*, int64_t*) {}
static void transfer(void*, int64_t* new_slot, int64_t* old_slot) {
*new_slot = *old_slot;
}
static int64_t& element(slot_type* slot) { return *slot; }
template <class F>
static auto apply(F&& f, int64_t x) -> decltype(std::forward<F>(f)(x, x)) {
return std::forward<F>(f)(x, x);
}
};
class StringPolicy {
template <class F, class K, class V,
class = typename std::enable_if<
std::is_convertible<const K&, absl::string_view>::value>::type>
decltype(std::declval<F>()(
std::declval<const absl::string_view&>(), std::piecewise_construct,
std::declval<std::tuple<K>>(),
std::declval<V>())) static apply_impl(F&& f,
std::pair<std::tuple<K>, V> p) {
const absl::string_view& key = std::get<0>(p.first);
return std::forward<F>(f)(key, std::piecewise_construct, std::move(p.first),
std::move(p.second));
}
public:
struct slot_type {
struct ctor {};
template <class... Ts>
slot_type(ctor, Ts&&... ts) : pair(std::forward<Ts>(ts)...) {}
std::pair<std::string, std::string> pair;
};
using key_type = std::string;
using init_type = std::pair<std::string, std::string>;
template <class allocator_type, class... Args>
static void construct(allocator_type* alloc, slot_type* slot, Args... args) {
std::allocator_traits<allocator_type>::construct(
*alloc, slot, typename slot_type::ctor(), std::forward<Args>(args)...);
}
template <class allocator_type>
static void destroy(allocator_type* alloc, slot_type* slot) {
std::allocator_traits<allocator_type>::destroy(*alloc, slot);
}
template <class allocator_type>
static void transfer(allocator_type* alloc, slot_type* new_slot,
slot_type* old_slot) {
construct(alloc, new_slot, std::move(old_slot->pair));
destroy(alloc, old_slot);
}
static std::pair<std::string, std::string>& element(slot_type* slot) {
return slot->pair;
}
template <class F, class... Args>
static auto apply(F&& f, Args&&... args)
-> decltype(apply_impl(std::forward<F>(f),
PairArgs(std::forward<Args>(args)...))) {
return apply_impl(std::forward<F>(f),
PairArgs(std::forward<Args>(args)...));
}
};
struct StringHash : container_internal::hash_default_hash<absl::string_view> {
using is_transparent = void;
};
struct StringEq : std::equal_to<absl::string_view> {
using is_transparent = void;
};
struct StringTable
: raw_hash_set<StringPolicy, StringHash, StringEq, std::allocator<int>> {
using Base = typename StringTable::raw_hash_set;
StringTable() {}
using Base::Base;
};
struct IntTable
: raw_hash_set<IntPolicy, container_internal::hash_default_hash<int64_t>,
std::equal_to<int64_t>, std::allocator<int64_t>> {
using Base = typename IntTable::raw_hash_set;
IntTable() {}
using Base::Base;
};
struct string_generator {
template <class RNG>
std::string operator()(RNG& rng) const {
std::string res;
res.resize(12);
std::uniform_int_distribution<uint32_t> printable_ascii(0x20, 0x7E);
std::generate(res.begin(), res.end(), [&] { return printable_ascii(rng); });
return res;
}
size_t size;
};
// Model a cache in steady state.
//
// On a table of size N, keep deleting the LRU entry and add a random one.
void BM_CacheInSteadyState(benchmark::State& state) {
std::random_device rd;
std::mt19937 rng(rd());
string_generator gen{12};
StringTable t;
std::deque<std::string> keys;
while (t.size() < state.range(0)) {
auto x = t.emplace(gen(rng), gen(rng));
if (x.second) keys.push_back(x.first->first);
}
ABSL_RAW_CHECK(state.range(0) >= 10, "");
while (state.KeepRunning()) {
// Some cache hits.
std::deque<std::string>::const_iterator it;
for (int i = 0; i != 90; ++i) {
if (i % 10 == 0) it = keys.end();
::benchmark::DoNotOptimize(t.find(*--it));
}
// Some cache misses.
for (int i = 0; i != 10; ++i) ::benchmark::DoNotOptimize(t.find(gen(rng)));
ABSL_RAW_CHECK(t.erase(keys.front()), keys.front().c_str());
keys.pop_front();
while (true) {
auto x = t.emplace(gen(rng), gen(rng));
if (x.second) {
keys.push_back(x.first->first);
break;
}
}
}
state.SetItemsProcessed(state.iterations());
state.SetLabel(absl::StrFormat("load_factor=%.2f", t.load_factor()));
}
template <typename Benchmark>
void CacheInSteadyStateArgs(Benchmark* bm) {
// The default.
const float max_load_factor = 0.875;
// When the cache is at the steady state, the probe sequence will equal
// capacity if there is no reclamation of deleted slots. Pick a number large
// enough to make the benchmark slow for that case.
const size_t capacity = 1 << 10;
// Check N data points to cover load factors in [0.4, 0.8).
const size_t kNumPoints = 10;
for (size_t i = 0; i != kNumPoints; ++i)
bm->Arg(std::ceil(
capacity * (max_load_factor + i * max_load_factor / kNumPoints) / 2));
}
BENCHMARK(BM_CacheInSteadyState)->Apply(CacheInSteadyStateArgs);
void BM_EndComparison(benchmark::State& state) {
std::random_device rd;
std::mt19937 rng(rd());
string_generator gen{12};
StringTable t;
while (t.size() < state.range(0)) {
t.emplace(gen(rng), gen(rng));
}
for (auto _ : state) {
for (auto it = t.begin(); it != t.end(); ++it) {
benchmark::DoNotOptimize(it);
benchmark::DoNotOptimize(t);
benchmark::DoNotOptimize(it != t.end());
}
}
}
BENCHMARK(BM_EndComparison)->Arg(400);
void BM_CopyCtor(benchmark::State& state) {
std::random_device rd;
std::mt19937 rng(rd());
IntTable t;
std::uniform_int_distribution<uint64_t> dist(0, ~uint64_t{});
while (t.size() < state.range(0)) {
t.emplace(dist(rng));
}
for (auto _ : state) {
IntTable t2 = t;
benchmark::DoNotOptimize(t2);
}
}
BENCHMARK(BM_CopyCtor)->Range(128, 4096);
void BM_CopyAssign(benchmark::State& state) {
std::random_device rd;
std::mt19937 rng(rd());
IntTable t;
std::uniform_int_distribution<uint64_t> dist(0, ~uint64_t{});
while (t.size() < state.range(0)) {
t.emplace(dist(rng));
}
IntTable t2;
for (auto _ : state) {
t2 = t;
benchmark::DoNotOptimize(t2);
}
}
BENCHMARK(BM_CopyAssign)->Range(128, 4096);
void BM_NoOpReserveIntTable(benchmark::State& state) {
IntTable t;
t.reserve(100000);
for (auto _ : state) {
benchmark::DoNotOptimize(t);
t.reserve(100000);
}
}
BENCHMARK(BM_NoOpReserveIntTable);
void BM_NoOpReserveStringTable(benchmark::State& state) {
StringTable t;
t.reserve(100000);
for (auto _ : state) {
benchmark::DoNotOptimize(t);
t.reserve(100000);
}
}
BENCHMARK(BM_NoOpReserveStringTable);
void BM_ReserveIntTable(benchmark::State& state) {
int reserve_size = state.range(0);
for (auto _ : state) {
state.PauseTiming();
IntTable t;
state.ResumeTiming();
benchmark::DoNotOptimize(t);
t.reserve(reserve_size);
}
}
BENCHMARK(BM_ReserveIntTable)->Range(128, 4096);
void BM_ReserveStringTable(benchmark::State& state) {
int reserve_size = state.range(0);
for (auto _ : state) {
state.PauseTiming();
StringTable t;
state.ResumeTiming();
benchmark::DoNotOptimize(t);
t.reserve(reserve_size);
}
}
BENCHMARK(BM_ReserveStringTable)->Range(128, 4096);
void BM_Group_Match(benchmark::State& state) {
std::array<ctrl_t, Group::kWidth> group;
std::iota(group.begin(), group.end(), -4);
Group g{group.data()};
h2_t h = 1;
for (auto _ : state) {
::benchmark::DoNotOptimize(h);
::benchmark::DoNotOptimize(g.Match(h));
}
}
BENCHMARK(BM_Group_Match);
void BM_Group_MatchEmpty(benchmark::State& state) {
std::array<ctrl_t, Group::kWidth> group;
std::iota(group.begin(), group.end(), -4);
Group g{group.data()};
for (auto _ : state) ::benchmark::DoNotOptimize(g.MatchEmpty());
}
BENCHMARK(BM_Group_MatchEmpty);
void BM_Group_MatchEmptyOrDeleted(benchmark::State& state) {
std::array<ctrl_t, Group::kWidth> group;
std::iota(group.begin(), group.end(), -4);
Group g{group.data()};
for (auto _ : state) ::benchmark::DoNotOptimize(g.MatchEmptyOrDeleted());
}
BENCHMARK(BM_Group_MatchEmptyOrDeleted);
void BM_Group_CountLeadingEmptyOrDeleted(benchmark::State& state) {
std::array<ctrl_t, Group::kWidth> group;
std::iota(group.begin(), group.end(), -2);
Group g{group.data()};
for (auto _ : state)
::benchmark::DoNotOptimize(g.CountLeadingEmptyOrDeleted());
}
BENCHMARK(BM_Group_CountLeadingEmptyOrDeleted);
void BM_Group_MatchFirstEmptyOrDeleted(benchmark::State& state) {
std::array<ctrl_t, Group::kWidth> group;
std::iota(group.begin(), group.end(), -2);
Group g{group.data()};
for (auto _ : state) ::benchmark::DoNotOptimize(*g.MatchEmptyOrDeleted());
}
BENCHMARK(BM_Group_MatchFirstEmptyOrDeleted);
void BM_DropDeletes(benchmark::State& state) {
constexpr size_t capacity = (1 << 20) - 1;
std::vector<ctrl_t> ctrl(capacity + 1 + Group::kWidth);
ctrl[capacity] = kSentinel;
std::vector<ctrl_t> pattern = {kEmpty, 2, kDeleted, 2, kEmpty, 1, kDeleted};
for (size_t i = 0; i != capacity; ++i) {
ctrl[i] = pattern[i % pattern.size()];
}
while (state.KeepRunning()) {
state.PauseTiming();
std::vector<ctrl_t> ctrl_copy = ctrl;
state.ResumeTiming();
ConvertDeletedToEmptyAndFullToDeleted(ctrl_copy.data(), capacity);
::benchmark::DoNotOptimize(ctrl_copy[capacity]);
}
}
BENCHMARK(BM_DropDeletes);
} // namespace
} // namespace container_internal
ABSL_NAMESPACE_END
} // namespace absl
// These methods are here to make it easy to examine the assembly for targeted
// parts of the API.
auto CodegenAbslRawHashSetInt64Find(absl::container_internal::IntTable* table,
int64_t key) -> decltype(table->find(key)) {
return table->find(key);
}
bool CodegenAbslRawHashSetInt64FindNeEnd(
absl::container_internal::IntTable* table, int64_t key) {
return table->find(key) != table->end();
}
bool CodegenAbslRawHashSetInt64Contains(
absl::container_internal::IntTable* table, int64_t key) {
return table->contains(key);
}
void CodegenAbslRawHashSetInt64Iterate(
absl::container_internal::IntTable* table) {
for (auto x : *table) benchmark::DoNotOptimize(x);
}
int odr =
(::benchmark::DoNotOptimize(std::make_tuple(
&CodegenAbslRawHashSetInt64Find, &CodegenAbslRawHashSetInt64FindNeEnd,
&CodegenAbslRawHashSetInt64Contains,
&CodegenAbslRawHashSetInt64Iterate)),
1);

@ -0,0 +1,590 @@
// Copyright 2018 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Generates probe length statistics for many combinations of key types and key
// distributions, all using the default hash function for swisstable.
#include <memory>
#include <regex> // NOLINT
#include <vector>
#include "absl/container/flat_hash_map.h"
#include "absl/container/internal/hash_function_defaults.h"
#include "absl/container/internal/hashtable_debug.h"
#include "absl/container/internal/raw_hash_set.h"
#include "absl/random/distributions.h"
#include "absl/random/random.h"
#include "absl/strings/str_cat.h"
#include "absl/strings/str_format.h"
#include "absl/strings/string_view.h"
#include "absl/strings/strip.h"
namespace {
enum class OutputStyle { kRegular, kBenchmark };
// The --benchmark command line flag.
// This is populated from main().
// When run in "benchmark" mode, we have different output. This allows
// A/B comparisons with tools like `benchy`.
absl::string_view benchmarks;
OutputStyle output() {
return !benchmarks.empty() ? OutputStyle::kBenchmark : OutputStyle::kRegular;
}
template <class T>
struct Policy {
using slot_type = T;
using key_type = T;
using init_type = T;
template <class allocator_type, class Arg>
static void construct(allocator_type* alloc, slot_type* slot,
const Arg& arg) {
std::allocator_traits<allocator_type>::construct(*alloc, slot, arg);
}
template <class allocator_type>
static void destroy(allocator_type* alloc, slot_type* slot) {
std::allocator_traits<allocator_type>::destroy(*alloc, slot);
}
static slot_type& element(slot_type* slot) { return *slot; }
template <class F, class... Args>
static auto apply(F&& f, const slot_type& arg)
-> decltype(std::forward<F>(f)(arg, arg)) {
return std::forward<F>(f)(arg, arg);
}
};
absl::BitGen& GlobalBitGen() {
static auto* value = new absl::BitGen;
return *value;
}
// Keeps a pool of allocations and randomly gives one out.
// This introduces more randomization to the addresses given to swisstable and
// should help smooth out this factor from probe length calculation.
template <class T>
class RandomizedAllocator {
public:
using value_type = T;
RandomizedAllocator() = default;
template <typename U>
RandomizedAllocator(RandomizedAllocator<U>) {} // NOLINT
static T* allocate(size_t n) {
auto& pointers = GetPointers(n);
// Fill the pool
while (pointers.size() < kRandomPool) {
pointers.push_back(std::allocator<T>{}.allocate(n));
}
// Choose a random one.
size_t i = absl::Uniform<size_t>(GlobalBitGen(), 0, pointers.size());
T* result = pointers[i];
pointers[i] = pointers.back();
pointers.pop_back();
return result;
}
static void deallocate(T* p, size_t n) {
// Just put it back on the pool. No need to release the memory.
GetPointers(n).push_back(p);
}
private:
// We keep at least kRandomPool allocations for each size.
static constexpr size_t kRandomPool = 20;
static std::vector<T*>& GetPointers(size_t n) {
static auto* m = new absl::flat_hash_map<size_t, std::vector<T*>>();
return (*m)[n];
}
};
template <class T>
struct DefaultHash {
using type = absl::container_internal::hash_default_hash<T>;
};
template <class T>
using DefaultHashT = typename DefaultHash<T>::type;
template <class T>
struct Table : absl::container_internal::raw_hash_set<
Policy<T>, DefaultHashT<T>,
absl::container_internal::hash_default_eq<T>,
RandomizedAllocator<T>> {};
struct LoadSizes {
size_t min_load;
size_t max_load;
};
LoadSizes GetMinMaxLoadSizes() {
static const auto sizes = [] {
Table<int> t;
// First, fill enough to have a good distribution.
constexpr size_t kMinSize = 10000;
while (t.size() < kMinSize) t.insert(t.size());
const auto reach_min_load_factor = [&] {
const double lf = t.load_factor();
while (lf <= t.load_factor()) t.insert(t.size());
};
// Then, insert until we reach min load factor.
reach_min_load_factor();
const size_t min_load_size = t.size();
// Keep going until we hit min load factor again, then go back one.
t.insert(t.size());
reach_min_load_factor();
return LoadSizes{min_load_size, t.size() - 1};
}();
return sizes;
}
struct Ratios {
double min_load;
double avg_load;
double max_load;
};
// See absl/container/internal/hashtable_debug.h for details on
// probe length calculation.
template <class ElemFn>
Ratios CollectMeanProbeLengths() {
const auto min_max_sizes = GetMinMaxLoadSizes();
ElemFn elem;
using Key = decltype(elem());
Table<Key> t;
Ratios result;
while (t.size() < min_max_sizes.min_load) t.insert(elem());
result.min_load =
absl::container_internal::GetHashtableDebugProbeSummary(t).mean;
while (t.size() < (min_max_sizes.min_load + min_max_sizes.max_load) / 2)
t.insert(elem());
result.avg_load =
absl::container_internal::GetHashtableDebugProbeSummary(t).mean;
while (t.size() < min_max_sizes.max_load) t.insert(elem());
result.max_load =
absl::container_internal::GetHashtableDebugProbeSummary(t).mean;
return result;
}
template <int Align>
uintptr_t PointerForAlignment() {
alignas(Align) static constexpr uintptr_t kInitPointer = 0;
return reinterpret_cast<uintptr_t>(&kInitPointer);
}
// This incomplete type is used for testing hash of pointers of different
// alignments.
// NOTE: We are generating invalid pointer values on the fly with
// reinterpret_cast. There are not "safely derived" pointers so using them is
// technically UB. It is unlikely to be a problem, though.
template <int Align>
struct Ptr;
template <int Align>
Ptr<Align>* MakePtr(uintptr_t v) {
if (sizeof(v) == 8) {
constexpr int kCopyBits = 16;
// Ensure high bits are all the same.
v = static_cast<uintptr_t>(static_cast<intptr_t>(v << kCopyBits) >>
kCopyBits);
}
return reinterpret_cast<Ptr<Align>*>(v);
}
struct IntIdentity {
uint64_t i;
friend bool operator==(IntIdentity a, IntIdentity b) { return a.i == b.i; }
IntIdentity operator++(int) { return IntIdentity{i++}; }
};
template <int Align>
struct PtrIdentity {
explicit PtrIdentity(uintptr_t val = PointerForAlignment<Align>()) : i(val) {}
uintptr_t i;
friend bool operator==(PtrIdentity a, PtrIdentity b) { return a.i == b.i; }
PtrIdentity operator++(int) {
PtrIdentity p(i);
i += Align;
return p;
}
};
constexpr char kStringFormat[] = "/path/to/file/name-%07d-of-9999999.txt";
template <bool small>
struct String {
std::string value;
static std::string Make(uint32_t v) {
return {small ? absl::StrCat(v) : absl::StrFormat(kStringFormat, v)};
}
};
template <>
struct DefaultHash<IntIdentity> {
struct type {
size_t operator()(IntIdentity t) const { return t.i; }
};
};
template <int Align>
struct DefaultHash<PtrIdentity<Align>> {
struct type {
size_t operator()(PtrIdentity<Align> t) const { return t.i; }
};
};
template <class T>
struct Sequential {
T operator()() const { return current++; }
mutable T current{};
};
template <int Align>
struct Sequential<Ptr<Align>*> {
Ptr<Align>* operator()() const {
auto* result = MakePtr<Align>(current);
current += Align;
return result;
}
mutable uintptr_t current = PointerForAlignment<Align>();
};
template <bool small>
struct Sequential<String<small>> {
std::string operator()() const { return String<small>::Make(current++); }
mutable uint32_t current = 0;
};
template <class T, class U>
struct Sequential<std::pair<T, U>> {
mutable Sequential<T> tseq;
mutable Sequential<U> useq;
using RealT = decltype(tseq());
using RealU = decltype(useq());
mutable std::vector<RealT> ts;
mutable std::vector<RealU> us;
mutable size_t ti = 0, ui = 0;
std::pair<RealT, RealU> operator()() const {
std::pair<RealT, RealU> value{get_t(), get_u()};
if (ti == 0) {
ti = ui + 1;
ui = 0;
} else {
--ti;
++ui;
}
return value;
}
RealT get_t() const {
while (ti >= ts.size()) ts.push_back(tseq());
return ts[ti];
}
RealU get_u() const {
while (ui >= us.size()) us.push_back(useq());
return us[ui];
}
};
template <class T, int percent_skip>
struct AlmostSequential {
mutable Sequential<T> current;
auto operator()() const -> decltype(current()) {
while (absl::Uniform(GlobalBitGen(), 0.0, 1.0) <= percent_skip / 100.)
current();
return current();
}
};
struct Uniform {
template <typename T>
T operator()(T) const {
return absl::Uniform<T>(absl::IntervalClosed, GlobalBitGen(), T{0}, ~T{0});
}
};
struct Gaussian {
template <typename T>
T operator()(T) const {
double d;
do {
d = absl::Gaussian<double>(GlobalBitGen(), 1e6, 1e4);
} while (d <= 0 || d > std::numeric_limits<T>::max() / 2);
return static_cast<T>(d);
}
};
struct Zipf {
template <typename T>
T operator()(T) const {
return absl::Zipf<T>(GlobalBitGen(), std::numeric_limits<T>::max(), 1.6);
}
};
template <class T, class Dist>
struct Random {
T operator()() const { return Dist{}(T{}); }
};
template <class Dist, int Align>
struct Random<Ptr<Align>*, Dist> {
Ptr<Align>* operator()() const {
return MakePtr<Align>(Random<uintptr_t, Dist>{}() * Align);
}
};
template <class Dist>
struct Random<IntIdentity, Dist> {
IntIdentity operator()() const {
return IntIdentity{Random<uint64_t, Dist>{}()};
}
};
template <class Dist, int Align>
struct Random<PtrIdentity<Align>, Dist> {
PtrIdentity<Align> operator()() const {
return PtrIdentity<Align>{Random<uintptr_t, Dist>{}() * Align};
}
};
template <class Dist, bool small>
struct Random<String<small>, Dist> {
std::string operator()() const {
return String<small>::Make(Random<uint32_t, Dist>{}());
}
};
template <class T, class U, class Dist>
struct Random<std::pair<T, U>, Dist> {
auto operator()() const
-> decltype(std::make_pair(Random<T, Dist>{}(), Random<U, Dist>{}())) {
return std::make_pair(Random<T, Dist>{}(), Random<U, Dist>{}());
}
};
template <typename>
std::string Name();
std::string Name(uint32_t*) { return "u32"; }
std::string Name(uint64_t*) { return "u64"; }
std::string Name(IntIdentity*) { return "IntIdentity"; }
template <int Align>
std::string Name(Ptr<Align>**) {
return absl::StrCat("Ptr", Align);
}
template <int Align>
std::string Name(PtrIdentity<Align>*) {
return absl::StrCat("PtrIdentity", Align);
}
template <bool small>
std::string Name(String<small>*) {
return small ? "StrS" : "StrL";
}
template <class T, class U>
std::string Name(std::pair<T, U>*) {
if (output() == OutputStyle::kBenchmark)
return absl::StrCat("P_", Name<T>(), "_", Name<U>());
return absl::StrCat("P<", Name<T>(), ",", Name<U>(), ">");
}
template <class T>
std::string Name(Sequential<T>*) {
return "Sequential";
}
template <class T, int P>
std::string Name(AlmostSequential<T, P>*) {
return absl::StrCat("AlmostSeq_", P);
}
template <class T>
std::string Name(Random<T, Uniform>*) {
return "UnifRand";
}
template <class T>
std::string Name(Random<T, Gaussian>*) {
return "GausRand";
}
template <class T>
std::string Name(Random<T, Zipf>*) {
return "ZipfRand";
}
template <typename T>
std::string Name() {
return Name(static_cast<T*>(nullptr));
}
constexpr int kNameWidth = 15;
constexpr int kDistWidth = 16;
bool CanRunBenchmark(absl::string_view name) {
static std::regex* const filter = []() -> std::regex* {
return benchmarks.empty() || benchmarks == "all"
? nullptr
: new std::regex(std::string(benchmarks));
}();
return filter == nullptr || std::regex_search(std::string(name), *filter);
}
struct Result {
std::string name;
std::string dist_name;
Ratios ratios;
};
template <typename T, typename Dist>
void RunForTypeAndDistribution(std::vector<Result>& results) {
std::string name = absl::StrCat(Name<T>(), "/", Name<Dist>());
// We have to check against all three names (min/avg/max) before we run it.
// If any of them is enabled, we run it.
if (!CanRunBenchmark(absl::StrCat(name, "/min")) &&
!CanRunBenchmark(absl::StrCat(name, "/avg")) &&
!CanRunBenchmark(absl::StrCat(name, "/max"))) {
return;
}
results.push_back({Name<T>(), Name<Dist>(), CollectMeanProbeLengths<Dist>()});
}
template <class T>
void RunForType(std::vector<Result>& results) {
RunForTypeAndDistribution<T, Sequential<T>>(results);
RunForTypeAndDistribution<T, AlmostSequential<T, 20>>(results);
RunForTypeAndDistribution<T, AlmostSequential<T, 50>>(results);
RunForTypeAndDistribution<T, Random<T, Uniform>>(results);
#ifdef NDEBUG
// Disable these in non-opt mode because they take too long.
RunForTypeAndDistribution<T, Random<T, Gaussian>>(results);
RunForTypeAndDistribution<T, Random<T, Zipf>>(results);
#endif // NDEBUG
}
} // namespace
int main(int argc, char** argv) {
// Parse the benchmark flags. Ignore all of them except the regex pattern.
for (int i = 1; i < argc; ++i) {
absl::string_view arg = argv[i];
const auto next = [&] { return argv[std::min(i + 1, argc - 1)]; };
if (absl::ConsumePrefix(&arg, "--benchmark_filter")) {
if (arg == "") {
// --benchmark_filter X
benchmarks = next();
} else if (absl::ConsumePrefix(&arg, "=")) {
// --benchmark_filter=X
benchmarks = arg;
}
}
// Any --benchmark flag turns on the mode.
if (absl::ConsumePrefix(&arg, "--benchmark")) {
if (benchmarks.empty()) benchmarks="all";
}
}
std::vector<Result> results;
RunForType<uint64_t>(results);
RunForType<IntIdentity>(results);
RunForType<Ptr<8>*>(results);
RunForType<Ptr<16>*>(results);
RunForType<Ptr<32>*>(results);
RunForType<Ptr<64>*>(results);
RunForType<PtrIdentity<8>>(results);
RunForType<PtrIdentity<16>>(results);
RunForType<PtrIdentity<32>>(results);
RunForType<PtrIdentity<64>>(results);
RunForType<std::pair<uint32_t, uint32_t>>(results);
RunForType<String<true>>(results);
RunForType<String<false>>(results);
RunForType<std::pair<uint64_t, String<true>>>(results);
RunForType<std::pair<String<true>, uint64_t>>(results);
RunForType<std::pair<uint64_t, String<false>>>(results);
RunForType<std::pair<String<false>, uint64_t>>(results);
switch (output()) {
case OutputStyle::kRegular:
absl::PrintF("%-*s%-*s Min Avg Max\n%s\n", kNameWidth,
"Type", kDistWidth, "Distribution",
std::string(kNameWidth + kDistWidth + 10 * 3, '-'));
for (const auto& result : results) {
absl::PrintF("%-*s%-*s %8.4f %8.4f %8.4f\n", kNameWidth, result.name,
kDistWidth, result.dist_name, result.ratios.min_load,
result.ratios.avg_load, result.ratios.max_load);
}
break;
case OutputStyle::kBenchmark: {
absl::PrintF("{\n");
absl::PrintF(" \"benchmarks\": [\n");
absl::string_view comma;
for (const auto& result : results) {
auto print = [&](absl::string_view stat, double Ratios::*val) {
std::string name =
absl::StrCat(result.name, "/", result.dist_name, "/", stat);
// Check the regex again. We might had have enabled only one of the
// stats for the benchmark.
if (!CanRunBenchmark(name)) return;
absl::PrintF(" %s{\n", comma);
absl::PrintF(" \"cpu_time\": %f,\n", 1e9 * result.ratios.*val);
absl::PrintF(" \"real_time\": %f,\n", 1e9 * result.ratios.*val);
absl::PrintF(" \"iterations\": 1,\n");
absl::PrintF(" \"name\": \"%s\",\n", name);
absl::PrintF(" \"time_unit\": \"ns\"\n");
absl::PrintF(" }\n");
comma = ",";
};
print("min", &Ratios::min_load);
print("avg", &Ratios::avg_load);
print("max", &Ratios::max_load);
}
absl::PrintF(" ],\n");
absl::PrintF(" \"context\": {\n");
absl::PrintF(" }\n");
absl::PrintF("}\n");
break;
}
}
return 0;
}

@ -82,6 +82,24 @@ cc_test(
],
)
cc_binary(
name = "hash_benchmark",
testonly = 1,
srcs = ["hash_benchmark.cc"],
copts = ABSL_TEST_COPTS,
linkopts = ABSL_DEFAULT_LINKOPTS,
tags = ["benchmark"],
visibility = ["//visibility:private"],
deps = [
":hash",
"//absl/base:core_headers",
"//absl/random",
"//absl/strings:cord",
"//absl/strings:cord_test_helpers",
"@com_github_google_benchmark//:benchmark_main",
],
)
cc_library(
name = "spy_hash_state",
testonly = 1,

@ -0,0 +1,249 @@
// Copyright 2018 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <typeindex>
#include "absl/base/attributes.h"
#include "absl/hash/hash.h"
#include "absl/random/random.h"
#include "absl/strings/cord.h"
#include "absl/strings/cord_test_helpers.h"
#include "benchmark/benchmark.h"
namespace {
using absl::Hash;
template <template <typename> class H, typename T>
void RunBenchmark(benchmark::State& state, T value) {
H<T> h;
for (auto _ : state) {
benchmark::DoNotOptimize(value);
benchmark::DoNotOptimize(h(value));
}
}
} // namespace
template <typename T>
using AbslHash = absl::Hash<T>;
class TypeErasedInterface {
public:
virtual ~TypeErasedInterface() = default;
template <typename H>
friend H AbslHashValue(H state, const TypeErasedInterface& wrapper) {
state = H::combine(std::move(state), std::type_index(typeid(wrapper)));
wrapper.HashValue(absl::HashState::Create(&state));
return state;
}
private:
virtual void HashValue(absl::HashState state) const = 0;
};
template <typename T>
struct TypeErasedAbslHash {
class Wrapper : public TypeErasedInterface {
public:
explicit Wrapper(const T& value) : value_(value) {}
private:
void HashValue(absl::HashState state) const override {
absl::HashState::combine(std::move(state), value_);
}
const T& value_;
};
size_t operator()(const T& value) {
return absl::Hash<Wrapper>{}(Wrapper(value));
}
};
template <typename FuncType>
inline FuncType* ODRUseFunction(FuncType* ptr) {
volatile FuncType* dummy = ptr;
return dummy;
}
absl::Cord FlatCord(size_t size) {
absl::Cord result(std::string(size, 'a'));
result.Flatten();
return result;
}
absl::Cord FragmentedCord(size_t size) {
const size_t orig_size = size;
std::vector<std::string> chunks;
size_t chunk_size = std::max<size_t>(1, size / 10);
while (size > chunk_size) {
chunks.push_back(std::string(chunk_size, 'a'));
size -= chunk_size;
}
if (size > 0) {
chunks.push_back(std::string(size, 'a'));
}
absl::Cord result = absl::MakeFragmentedCord(chunks);
(void) orig_size;
assert(result.size() == orig_size);
return result;
}
// Generates a benchmark and a codegen method for the provided types. The
// codegen method provides a well known entrypoint for dumping assembly.
#define MAKE_BENCHMARK(hash, name, ...) \
namespace { \
void BM_##hash##_##name(benchmark::State& state) { \
RunBenchmark<hash>(state, __VA_ARGS__); \
} \
BENCHMARK(BM_##hash##_##name); \
} \
size_t Codegen##hash##name(const decltype(__VA_ARGS__)& arg); \
size_t Codegen##hash##name(const decltype(__VA_ARGS__)& arg) { \
return hash<decltype(__VA_ARGS__)>{}(arg); \
} \
bool absl_hash_test_odr_use##hash##name = \
ODRUseFunction(&Codegen##hash##name);
MAKE_BENCHMARK(AbslHash, Int32, int32_t{});
MAKE_BENCHMARK(AbslHash, Int64, int64_t{});
MAKE_BENCHMARK(AbslHash, Double, 1.2);
MAKE_BENCHMARK(AbslHash, DoubleZero, 0.0);
MAKE_BENCHMARK(AbslHash, PairInt32Int32, std::pair<int32_t, int32_t>{});
MAKE_BENCHMARK(AbslHash, PairInt64Int64, std::pair<int64_t, int64_t>{});
MAKE_BENCHMARK(AbslHash, TupleInt32BoolInt64,
std::tuple<int32_t, bool, int64_t>{});
MAKE_BENCHMARK(AbslHash, String_0, std::string());
MAKE_BENCHMARK(AbslHash, String_10, std::string(10, 'a'));
MAKE_BENCHMARK(AbslHash, String_30, std::string(30, 'a'));
MAKE_BENCHMARK(AbslHash, String_90, std::string(90, 'a'));
MAKE_BENCHMARK(AbslHash, String_200, std::string(200, 'a'));
MAKE_BENCHMARK(AbslHash, String_5000, std::string(5000, 'a'));
MAKE_BENCHMARK(AbslHash, Cord_Flat_0, absl::Cord());
MAKE_BENCHMARK(AbslHash, Cord_Flat_10, FlatCord(10));
MAKE_BENCHMARK(AbslHash, Cord_Flat_30, FlatCord(30));
MAKE_BENCHMARK(AbslHash, Cord_Flat_90, FlatCord(90));
MAKE_BENCHMARK(AbslHash, Cord_Flat_200, FlatCord(200));
MAKE_BENCHMARK(AbslHash, Cord_Flat_5000, FlatCord(5000));
MAKE_BENCHMARK(AbslHash, Cord_Fragmented_200, FragmentedCord(200));
MAKE_BENCHMARK(AbslHash, Cord_Fragmented_5000, FragmentedCord(5000));
MAKE_BENCHMARK(AbslHash, VectorInt64_10, std::vector<int64_t>(10));
MAKE_BENCHMARK(AbslHash, VectorInt64_100, std::vector<int64_t>(100));
MAKE_BENCHMARK(AbslHash, VectorDouble_10, std::vector<double>(10, 1.1));
MAKE_BENCHMARK(AbslHash, VectorDouble_100, std::vector<double>(100, 1.1));
MAKE_BENCHMARK(AbslHash, PairStringString_0,
std::make_pair(std::string(), std::string()));
MAKE_BENCHMARK(AbslHash, PairStringString_10,
std::make_pair(std::string(10, 'a'), std::string(10, 'b')));
MAKE_BENCHMARK(AbslHash, PairStringString_30,
std::make_pair(std::string(30, 'a'), std::string(30, 'b')));
MAKE_BENCHMARK(AbslHash, PairStringString_90,
std::make_pair(std::string(90, 'a'), std::string(90, 'b')));
MAKE_BENCHMARK(AbslHash, PairStringString_200,
std::make_pair(std::string(200, 'a'), std::string(200, 'b')));
MAKE_BENCHMARK(AbslHash, PairStringString_5000,
std::make_pair(std::string(5000, 'a'), std::string(5000, 'b')));
MAKE_BENCHMARK(TypeErasedAbslHash, Int32, int32_t{});
MAKE_BENCHMARK(TypeErasedAbslHash, Int64, int64_t{});
MAKE_BENCHMARK(TypeErasedAbslHash, PairInt32Int32,
std::pair<int32_t, int32_t>{});
MAKE_BENCHMARK(TypeErasedAbslHash, PairInt64Int64,
std::pair<int64_t, int64_t>{});
MAKE_BENCHMARK(TypeErasedAbslHash, TupleInt32BoolInt64,
std::tuple<int32_t, bool, int64_t>{});
MAKE_BENCHMARK(TypeErasedAbslHash, String_0, std::string());
MAKE_BENCHMARK(TypeErasedAbslHash, String_10, std::string(10, 'a'));
MAKE_BENCHMARK(TypeErasedAbslHash, String_30, std::string(30, 'a'));
MAKE_BENCHMARK(TypeErasedAbslHash, String_90, std::string(90, 'a'));
MAKE_BENCHMARK(TypeErasedAbslHash, String_200, std::string(200, 'a'));
MAKE_BENCHMARK(TypeErasedAbslHash, String_5000, std::string(5000, 'a'));
MAKE_BENCHMARK(TypeErasedAbslHash, VectorDouble_10,
std::vector<double>(10, 1.1));
MAKE_BENCHMARK(TypeErasedAbslHash, VectorDouble_100,
std::vector<double>(100, 1.1));
// The latency benchmark attempts to model the speed of the hash function in
// production. When a hash function is used for hashtable lookups it is rarely
// used to hash N items in a tight loop nor on constant sized strings. Instead,
// after hashing there is a potential equality test plus a (usually) large
// amount of user code. To simulate this effectively we introduce a data
// dependency between elements we hash by using the hash of the Nth element as
// the selector of the N+1th element to hash. This isolates the hash function
// code much like in production. As a bonus we use the hash to generate strings
// of size [1,N] (instead of fixed N) to disable perfect branch predictions in
// hash function implementations.
namespace {
// 16kb fits in L1 cache of most CPUs we care about. Keeping memory latency low
// will allow us to attribute most time to CPU which means more accurate
// measurements.
static constexpr size_t kEntropySize = 16 << 10;
static char entropy[kEntropySize + 1024];
ABSL_ATTRIBUTE_UNUSED static const bool kInitialized = [] {
absl::BitGen gen;
static_assert(sizeof(entropy) % sizeof(uint64_t) == 0, "");
for (int i = 0; i != sizeof(entropy); i += sizeof(uint64_t)) {
auto rand = absl::Uniform<uint64_t>(gen);
memcpy(&entropy[i], &rand, sizeof(uint64_t));
}
return true;
}();
} // namespace
template <class T>
struct PodRand {
static_assert(std::is_pod<T>::value, "");
static_assert(kEntropySize + sizeof(T) < sizeof(entropy), "");
T Get(size_t i) const {
T v;
memcpy(&v, &entropy[i % kEntropySize], sizeof(T));
return v;
}
};
template <size_t N>
struct StringRand {
static_assert(kEntropySize + N < sizeof(entropy), "");
absl::string_view Get(size_t i) const {
// This has a small bias towards small numbers. Because max N is ~200 this
// is very small and prefer to be very fast instead of absolutely accurate.
// Also we pass N = 2^K+1 so that mod reduces to a bitand.
size_t s = (i % (N - 1)) + 1;
return {&entropy[i % kEntropySize], s};
}
};
#define MAKE_LATENCY_BENCHMARK(hash, name, ...) \
namespace { \
void BM_latency_##hash##_##name(benchmark::State& state) { \
__VA_ARGS__ r; \
hash<decltype(r.Get(0))> h; \
size_t i = 871401241; \
for (auto _ : state) { \
benchmark::DoNotOptimize(i = h(r.Get(i))); \
} \
} \
BENCHMARK(BM_latency_##hash##_##name); \
} // namespace
MAKE_LATENCY_BENCHMARK(AbslHash, Int32, PodRand<int32_t>);
MAKE_LATENCY_BENCHMARK(AbslHash, Int64, PodRand<int64_t>);
MAKE_LATENCY_BENCHMARK(AbslHash, String9, StringRand<9>);
MAKE_LATENCY_BENCHMARK(AbslHash, String33, StringRand<33>);
MAKE_LATENCY_BENCHMARK(AbslHash, String65, StringRand<65>);
MAKE_LATENCY_BENCHMARK(AbslHash, String257, StringRand<257>);

@ -58,7 +58,6 @@ using ::absl::cord_internal::kMaxFlatLength;
using ::absl::cord_internal::CONCAT;
using ::absl::cord_internal::EXTERNAL;
using ::absl::cord_internal::FLAT;
using ::absl::cord_internal::MAX_FLAT_TAG;
using ::absl::cord_internal::SUBSTRING;
namespace cord_internal {
@ -93,6 +92,15 @@ inline const CordRepExternal* CordRep::external() const {
return static_cast<const CordRepExternal*>(this);
}
inline CordRepFlat* CordRep::flat() {
assert(tag >= FLAT);
return static_cast<CordRepFlat*>(this);
}
inline const CordRepFlat* CordRep::flat() const {
assert(tag >= FLAT);
return static_cast<const CordRepFlat*>(this);
}
} // namespace cord_internal
// Prefer copying blocks of at most this size, otherwise reference count.
@ -457,7 +465,7 @@ static inline bool PrepareAppendRegion(CordRep* root, char** region,
}
const size_t in_use = dst->length;
const size_t capacity = static_cast<CordRepFlat*>(dst)->Capacity();
const size_t capacity = dst->flat()->Capacity();
if (in_use == capacity) {
*region = nullptr;
*size = 0;
@ -539,7 +547,7 @@ void Cord::InlineRep::GetAppendRegion(char** region, size_t* size) {
// will return true.
static bool RepMemoryUsageLeaf(const CordRep* rep, size_t* total_mem_usage) {
if (rep->tag >= FLAT) {
*total_mem_usage += static_cast<const CordRepFlat*>(rep)->AllocatedSize();
*total_mem_usage += rep->flat()->AllocatedSize();
return true;
}
if (rep->tag == EXTERNAL) {
@ -637,7 +645,7 @@ Cord& Cord::operator=(absl::string_view src) {
return *this;
}
if (tree != nullptr && tree->tag >= FLAT &&
static_cast<CordRepFlat*>(tree)->Capacity() >= length &&
tree->flat()->Capacity() >= length &&
tree->refcount.IsOne()) {
// Copy in place if the existing FLAT node is reusable.
memmove(tree->data, data, length);
@ -694,7 +702,7 @@ void Cord::InlineRep::AppendArray(const char* src_data, size_t src_size) {
const size_t size2 = inline_length + src_size / 10;
root = CordRepFlat::New(std::max<size_t>(size1, size2));
appended = std::min(
src_size, static_cast<CordRepFlat*>(root)->Capacity() - inline_length);
src_size, root->flat()->Capacity() - inline_length);
memcpy(root->data, data_.as_chars, inline_length);
memcpy(root->data + inline_length, src_data, appended);
root->length = inline_length + appended;
@ -1785,7 +1793,7 @@ static void DumpNode(CordRep* rep, bool include_data, std::ostream* os) {
*os << absl::CEscape(std::string(rep->external()->base, rep->length));
*os << "]\n";
} else {
*os << "FLAT cap=" << static_cast<CordRepFlat*>(rep)->Capacity()
*os << "FLAT cap=" << rep->flat()->Capacity()
<< " [";
if (include_data)
*os << absl::CEscape(std::string(rep->data, rep->length));
@ -1835,7 +1843,7 @@ static bool VerifyNode(CordRep* root, CordRep* start_node,
}
} else if (node->tag >= FLAT) {
ABSL_INTERNAL_CHECK(
node->length <= static_cast<CordRepFlat*>(node)->Capacity(),
node->length <= node->flat()->Capacity(),
ReportError(root, node));
} else if (node->tag == EXTERNAL) {
ABSL_INTERNAL_CHECK(node->external()->base != nullptr,

@ -149,6 +149,8 @@ struct CordRep {
inline const CordRepSubstring* substring() const;
inline CordRepExternal* external();
inline const CordRepExternal* external() const;
inline CordRepFlat* flat();
inline const CordRepFlat* flat() const;
};
struct CordRepConcat : public CordRep {

@ -43,7 +43,7 @@ static constexpr size_t kMaxFlatSize = 4096;
static constexpr size_t kMaxFlatLength = kMaxFlatSize - kFlatOverhead;
static constexpr size_t kMinFlatLength = kMinFlatSize - kFlatOverhead;
static constexpr size_t AllocatedSizeToTagUnchecked(size_t size) {
constexpr size_t AllocatedSizeToTagUnchecked(size_t size) {
return (size <= 1024) ? size / 8 : 128 + size / 32 - 1024 / 32;
}
@ -51,12 +51,12 @@ static_assert(kMinFlatSize / 8 >= FLAT, "");
static_assert(AllocatedSizeToTagUnchecked(kMaxFlatSize) <= MAX_FLAT_TAG, "");
// Helper functions for rounded div, and rounding to exact sizes.
static size_t DivUp(size_t n, size_t m) { return (n + m - 1) / m; }
static size_t RoundUp(size_t n, size_t m) { return DivUp(n, m) * m; }
constexpr size_t DivUp(size_t n, size_t m) { return (n + m - 1) / m; }
constexpr size_t RoundUp(size_t n, size_t m) { return DivUp(n, m) * m; }
// Returns the size to the nearest equal or larger value that can be
// expressed exactly as a tag value.
static size_t RoundUpForTag(size_t size) {
inline size_t RoundUpForTag(size_t size) {
return RoundUp(size, (size <= 1024) ? 8 : 32);
}
@ -64,19 +64,19 @@ static size_t RoundUpForTag(size_t size) {
// does not exactly match a 'tag expressible' size value. The result is
// undefined if the size exceeds the maximum size that can be encoded in
// a tag, i.e., if size is larger than TagToAllocatedSize(<max tag>).
static uint8_t AllocatedSizeToTag(size_t size) {
inline uint8_t AllocatedSizeToTag(size_t size) {
const size_t tag = AllocatedSizeToTagUnchecked(size);
assert(tag <= MAX_FLAT_TAG);
return tag;
}
// Converts the provided tag to the corresponding allocated size
static constexpr size_t TagToAllocatedSize(uint8_t tag) {
constexpr size_t TagToAllocatedSize(uint8_t tag) {
return (tag <= 128) ? (tag * 8) : (1024 + (tag - 128) * 32);
}
// Converts the provided tag to the corresponding available data length
static constexpr size_t TagToLength(uint8_t tag) {
constexpr size_t TagToLength(uint8_t tag) {
return TagToAllocatedSize(tag) - kFlatOverhead;
}

@ -19,19 +19,22 @@
namespace absl {
ABSL_NAMESPACE_BEGIN
bool EqualsIgnoreCase(absl::string_view piece1, absl::string_view piece2) {
bool EqualsIgnoreCase(absl::string_view piece1,
absl::string_view piece2) noexcept {
return (piece1.size() == piece2.size() &&
0 == absl::strings_internal::memcasecmp(piece1.data(), piece2.data(),
piece1.size()));
// memcasecmp uses absl::ascii_tolower().
}
bool StartsWithIgnoreCase(absl::string_view text, absl::string_view prefix) {
bool StartsWithIgnoreCase(absl::string_view text,
absl::string_view prefix) noexcept {
return (text.size() >= prefix.size()) &&
EqualsIgnoreCase(text.substr(0, prefix.size()), prefix);
}
bool EndsWithIgnoreCase(absl::string_view text, absl::string_view suffix) {
bool EndsWithIgnoreCase(absl::string_view text,
absl::string_view suffix) noexcept {
return (text.size() >= suffix.size()) &&
EqualsIgnoreCase(text.substr(text.size() - suffix.size()), suffix);
}

@ -43,14 +43,20 @@ ABSL_NAMESPACE_BEGIN
// StrContains()
//
// Returns whether a given string `haystack` contains the substring `needle`.
inline bool StrContains(absl::string_view haystack, absl::string_view needle) {
inline bool StrContains(absl::string_view haystack,
absl::string_view needle) noexcept {
return haystack.find(needle, 0) != haystack.npos;
}
inline bool StrContains(absl::string_view haystack, char needle) noexcept {
return haystack.find(needle) != haystack.npos;
}
// StartsWith()
//
// Returns whether a given string `text` begins with `prefix`.
inline bool StartsWith(absl::string_view text, absl::string_view prefix) {
inline bool StartsWith(absl::string_view text,
absl::string_view prefix) noexcept {
return prefix.empty() ||
(text.size() >= prefix.size() &&
memcmp(text.data(), prefix.data(), prefix.size()) == 0);
@ -59,7 +65,8 @@ inline bool StartsWith(absl::string_view text, absl::string_view prefix) {
// EndsWith()
//
// Returns whether a given string `text` ends with `suffix`.
inline bool EndsWith(absl::string_view text, absl::string_view suffix) {
inline bool EndsWith(absl::string_view text,
absl::string_view suffix) noexcept {
return suffix.empty() ||
(text.size() >= suffix.size() &&
memcmp(text.data() + (text.size() - suffix.size()), suffix.data(),
@ -70,19 +77,22 @@ inline bool EndsWith(absl::string_view text, absl::string_view suffix) {
//
// Returns whether given ASCII strings `piece1` and `piece2` are equal, ignoring
// case in the comparison.
bool EqualsIgnoreCase(absl::string_view piece1, absl::string_view piece2);
bool EqualsIgnoreCase(absl::string_view piece1,
absl::string_view piece2) noexcept;
// StartsWithIgnoreCase()
//
// Returns whether a given ASCII string `text` starts with `prefix`,
// ignoring case in the comparison.
bool StartsWithIgnoreCase(absl::string_view text, absl::string_view prefix);
bool StartsWithIgnoreCase(absl::string_view text,
absl::string_view prefix) noexcept;
// EndsWithIgnoreCase()
//
// Returns whether a given ASCII string `text` ends with `suffix`, ignoring
// case in the comparison.
bool EndsWithIgnoreCase(absl::string_view text, absl::string_view suffix);
bool EndsWithIgnoreCase(absl::string_view text,
absl::string_view suffix) noexcept;
ABSL_NAMESPACE_END
} // namespace absl

@ -66,6 +66,23 @@ TEST(MatchTest, Contains) {
EXPECT_FALSE(absl::StrContains("", "a"));
}
TEST(MatchTest, ContainsChar) {
absl::string_view a("abcdefg");
absl::string_view b("abcd");
EXPECT_TRUE(absl::StrContains(a, 'a'));
EXPECT_TRUE(absl::StrContains(a, 'b'));
EXPECT_TRUE(absl::StrContains(a, 'e'));
EXPECT_FALSE(absl::StrContains(a, 'h'));
EXPECT_TRUE(absl::StrContains(b, 'a'));
EXPECT_TRUE(absl::StrContains(b, 'b'));
EXPECT_FALSE(absl::StrContains(b, 'e'));
EXPECT_FALSE(absl::StrContains(b, 'h'));
EXPECT_FALSE(absl::StrContains("", 'a'));
EXPECT_FALSE(absl::StrContains("", 'a'));
}
TEST(MatchTest, ContainsNull) {
const std::string s = "foo";
const char* cs = "foo";

@ -52,6 +52,7 @@ def _UpdateAbseilInChromium(abseil_dir, chromium_dir):
logging.info('Syncing abseil in chromium/src/third_party...')
exclude = [
'*BUILD.gn',
'DIR_METADATA',
'README.chromium',
'OWNERS',
'.gitignore',

@ -84,17 +84,19 @@ EXPORTS
??$?0AEA_KAEBV?$allocator@PEAUCordRep@cord_internal@absl@@@__1@std@@@?$CompressedTupleImpl@V?$CompressedTuple@_KV?$allocator@PEAUCordRep@cord_internal@absl@@@__1@std@@@container_internal@absl@@U?$integer_sequence@_K$0A@$00@3@$00@internal_compressed_tuple@container_internal@absl@@QEAA@Uin_place_t@3@AEA_KAEBV?$allocator@PEAUCordRep@cord_internal@absl@@@__1@std@@@Z
??$?0AEBV?$allocator@PEAUCordRep@cord_internal@absl@@@__1@std@@@?$Storage@V?$allocator@PEAUCordRep@cord_internal@absl@@@__1@std@@$00$00@internal_compressed_tuple@container_internal@absl@@QEAA@Uin_place_t@3@AEBV?$allocator@PEAUCordRep@cord_internal@absl@@@__1@std@@@Z
??$?0AEBV?$allocator@PEAUCordRep@cord_internal@absl@@@__1@std@@@?$Storage@V?$allocator@PEAUCordRep@cord_internal@absl@@@__1@std@@$0A@$00@internal_compressed_tuple@container_internal@absl@@QEAA@Uin_place_t@3@AEBV?$allocator@PEAUCordRep@cord_internal@absl@@@__1@std@@@Z
??$?0AEBV?$allocator@PEAUCordRep@cord_internal@absl@@@__1@std@@AEB_K@?$CompressedTupleImpl@V?$CompressedTuple@V?$allocator@PEAUCordRep@cord_internal@absl@@@__1@std@@_K@container_internal@absl@@U?$integer_sequence@_K$0A@$00@3@$00@internal_compressed_tuple@container_internal@absl@@QEAA@Uin_place_t@3@AEBV?$allocator@PEAUCordRep@cord_internal@absl@@@__1@std@@AEB_K@Z
??$?0AEBV?$allocator@PEAUCordRep@cord_internal@absl@@@__1@std@@H$00@?$CompressedTuple@V?$allocator@PEAUCordRep@cord_internal@absl@@@__1@std@@_K@container_internal@absl@@QEAA@AEBV?$allocator@PEAUCordRep@cord_internal@absl@@@__1@std@@$$QEAH@Z
??$?0AEBV?$allocator@PEAUCordRep@cord_internal@absl@@@__1@std@@H@?$CompressedTupleImpl@V?$CompressedTuple@V?$allocator@PEAUCordRep@cord_internal@absl@@@__1@std@@_K@container_internal@absl@@U?$integer_sequence@_K$0A@$00@3@$00@internal_compressed_tuple@container_internal@absl@@QEAA@Uin_place_t@3@AEBV?$allocator@PEAUCordRep@cord_internal@absl@@@__1@std@@$$QEAH@Z
??$?0AEBV?$allocator@UPayload@status_internal@absl@@@__1@std@@@?$Storage@V?$allocator@UPayload@status_internal@absl@@@__1@std@@$0A@$00@internal_compressed_tuple@container_internal@absl@@QEAA@Uin_place_t@3@AEBV?$allocator@UPayload@status_internal@absl@@@__1@std@@@Z
??$?0AEBV?$allocator@UPayload@status_internal@absl@@@__1@std@@AEB_K@?$CompressedTupleImpl@V?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@__1@std@@_K@container_internal@absl@@U?$integer_sequence@_K$0A@$00@3@$00@internal_compressed_tuple@container_internal@absl@@QEAA@Uin_place_t@3@AEBV?$allocator@UPayload@status_internal@absl@@@__1@std@@AEB_K@Z
??$?0AEBV?$allocator@UPayload@status_internal@absl@@@__1@std@@H$00@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@__1@std@@_K@container_internal@absl@@QEAA@AEBV?$allocator@UPayload@status_internal@absl@@@__1@std@@$$QEAH@Z
??$?0AEBV?$allocator@UPayload@status_internal@absl@@@__1@std@@H@?$CompressedTupleImpl@V?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@__1@std@@_K@container_internal@absl@@U?$integer_sequence@_K$0A@$00@3@$00@internal_compressed_tuple@container_internal@absl@@QEAA@Uin_place_t@3@AEBV?$allocator@UPayload@status_internal@absl@@@__1@std@@$$QEAH@Z
??$?0AEBV?$basic_string@DU?$char_traits@D@__1@std@@V?$allocator@D@23@@__1@std@@$$Z$$V$$Z$0A@$$Z$S@?$pair@$$CBV?$basic_string@DU?$char_traits@D@__1@std@@V?$allocator@D@23@@__1@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@__1@std@@AEAA@Upiecewise_construct_t@12@AEAV?$tuple@AEBV?$basic_string@DU?$char_traits@D@__1@std@@V?$allocator@D@23@@__1@std@@@12@AEAV?$tuple@$$V@12@U?$__tuple_indices@$0A@@12@U?$__tuple_indices@$S@12@@Z
??$?0AEBV?$basic_string@DU?$char_traits@D@__1@std@@V?$allocator@D@23@@__1@std@@$$Z$$V@?$pair@$$CBV?$basic_string@DU?$char_traits@D@__1@std@@V?$allocator@D@23@@__1@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@__1@std@@QEAA@Upiecewise_construct_t@12@V?$tuple@AEBV?$basic_string@DU?$char_traits@D@__1@std@@V?$allocator@D@23@@__1@std@@@12@V?$tuple@$$V@12@@Z
??$?0AEBVCord@absl@@$0A@@?$optional@VCord@absl@@@absl@@QEAA@AEBVCord@1@@Z
??$?0AEBVCord@absl@@@?$optional_data_dtor_base@VCord@absl@@$0A@@optional_internal@absl@@IEAA@Uin_place_t@2@AEBVCord@2@@Z
??$?0AEB_K@?$Storage@_K$00$0A@@internal_compressed_tuple@container_internal@absl@@QEAA@Uin_place_t@3@AEB_K@Z
??$?0H$00@?$__compressed_pair@_KV?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@__1@std@@V?$allocator@D@23@@__1@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@__1@std@@V?$allocator@D@23@@__1@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@__1@std@@V?$allocator@D@23@@__1@std@@@23@$00@__1@std@@@__1@std@@QEAA@$$QEAH@Z
??$?0H$00@?$__compressed_pair@_KV?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@__1@std@@V?$allocator@D@23@@__1@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@__1@std@@PEAX@__1@std@@@__1@std@@@__1@std@@@__1@std@@QEAA@$$QEAH@Z
??$?0H$00@?$__compressed_pair@_KV?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@__1@std@@@__1@std@@QEAA@$$QEAH@Z
??$?0H@?$Storage@_K$00$0A@@internal_compressed_tuple@container_internal@absl@@QEAA@Uin_place_t@3@$$QEAH@Z
??$?0H@FormatArgImpl@str_format_internal@absl@@QEAA@AEBH@Z
??$?0M$00@?$__compressed_pair@MV?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@__1@std@@V?$allocator@D@23@@__1@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@__1@std@@V?$allocator@D@23@@__1@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@__1@std@@V?$allocator@D@23@@__1@std@@@23@$00@__1@std@@@__1@std@@QEAA@$$QEAM@Z
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@ -619,7 +636,7 @@ EXPORTS
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@ -641,6 +658,11 @@ EXPORTS
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