7aacab8ae0
- 924ba2a3f9fca695d73c6bf491d20669e2b96b8e Changed RawPtr to use std::addressof() instead of operato... by Abseil Team <absl-team@google.com> - e8cf67f9fa74d4c5632da35547025ad2301c6819 Import of CCTZ from GitHub. by Alex Strelnikov <strel@google.com> - 2ece8a96611afcddd7b91e0197dadb896248250c Abandon ".inc" files in favor of ".h" headers. by Jorg Brown <jorg@google.com> - 37f5ed5da4058f90fb3e6a2733fce5b1fd0aaedf Add exception safety tests for absl::optional<T> by Abseil Team <absl-team@google.com> - 337f995a866b8f905f64ca6b271b5fec8f248a60 Update WORKSPACE to grab specific commits of dependencies... by Alex Strelnikov <strel@google.com> - 93e5b134607a554993387ad913e6c1621606004b Release Charmap microbenchmark. by Alex Strelnikov <strel@google.com> - 95c2e29b6d93ec1334484ee37d91f63101c45307 Release OStringStream microbenchmarks. by Alex Strelnikov <strel@google.com> - 250f51839ed26dd1e6b658d35aa291413e5f4825 Internal change by Greg Falcon <gfalcon@google.com> - ce34900fa3d1a95a8446bc943cdd801fac95be25 Improve compatibility of cctz cc_test targets for portabl... by Shaindel Schwartz <shaindel@google.com> - ce7e31dbf2c1ee93c79aae5b7dc7c603cb4babcf Improve portability of cc_tests. (Mark more tests that ca... by Abseil Team <absl-team@google.com> - dfcd4e455923703c1a1dcd523c5f915f7990fa2a Accept strings with custom allocators as arguments to abs... by Greg Falcon <gfalcon@google.com> - 2946b41ed3d5b8b5a8dc11182e443cf1ab6e3bde Link against benchmark_main instead of using BENCHMARK_MA... by Alex Strelnikov <strel@google.com> - f09de9e03bf8edd363069c4b352d8009423f531c Adds link to doc about the formats allowed by SimpleAtof(... by Greg Miller <jgm@google.com> - 59b0977e7a308e0800277886cf60226b2cc426a1 Simplify the HideMask() calculation so that it doesn't us... by Jorg Brown <jorg@google.com> GitOrigin-RevId: e2f6b8ac647271815b4fed2991f405524dd762c3 Change-Id: Ib9c8547ed7fe217fad6cb3ab1362e96181aa5cfa
61 lines
2 KiB
C++
61 lines
2 KiB
C++
// Copyright 2017 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "absl/strings/internal/char_map.h"
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#include <cstdint>
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#include "benchmark/benchmark.h"
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namespace {
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absl::strings_internal::Charmap MakeBenchmarkMap() {
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absl::strings_internal::Charmap m;
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uint32_t x[] = {0x0, 0x1, 0x2, 0x3, 0xf, 0xe, 0xd, 0xc};
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for (uint32_t& t : x) t *= static_cast<uint32_t>(0x11111111UL);
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for (uint32_t i = 0; i < 256; ++i) {
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if ((x[i / 32] >> (i % 32)) & 1)
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m = m | absl::strings_internal::Charmap::Char(i);
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}
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return m;
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}
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// Micro-benchmark for Charmap::contains.
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void BM_Contains(benchmark::State& state) {
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// Loop-body replicated 10 times to increase time per iteration.
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// Argument continuously changed to avoid generating common subexpressions.
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const absl::strings_internal::Charmap benchmark_map = MakeBenchmarkMap();
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unsigned char c = 0;
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int ops = 0;
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for (auto _ : state) {
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ops += benchmark_map.contains(c++);
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ops += benchmark_map.contains(c++);
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ops += benchmark_map.contains(c++);
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ops += benchmark_map.contains(c++);
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ops += benchmark_map.contains(c++);
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ops += benchmark_map.contains(c++);
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ops += benchmark_map.contains(c++);
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ops += benchmark_map.contains(c++);
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ops += benchmark_map.contains(c++);
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ops += benchmark_map.contains(c++);
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}
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benchmark::DoNotOptimize(ops);
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}
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BENCHMARK(BM_Contains);
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// We don't bother benchmarking Charmap::IsZero or Charmap::IntersectsWith;
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// their running time is data-dependent and it is not worth characterizing
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// "typical" data.
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} // namespace
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