From 7aacab8ae05d7115049923da9cfbf584dc1f8338 Mon Sep 17 00:00:00 2001 From: Abseil Team Date: Thu, 31 May 2018 12:26:35 -0700 Subject: - e2f6b8ac647271815b4fed2991f405524dd762c3 Release cctz microbenchmarks. by Alex Strelnikov - 924ba2a3f9fca695d73c6bf491d20669e2b96b8e Changed RawPtr to use std::addressof() instead of operato... by Abseil Team - e8cf67f9fa74d4c5632da35547025ad2301c6819 Import of CCTZ from GitHub. by Alex Strelnikov - 2ece8a96611afcddd7b91e0197dadb896248250c Abandon ".inc" files in favor of ".h" headers. by Jorg Brown - 37f5ed5da4058f90fb3e6a2733fce5b1fd0aaedf Add exception safety tests for absl::optional by Abseil Team - 337f995a866b8f905f64ca6b271b5fec8f248a60 Update WORKSPACE to grab specific commits of dependencies... by Alex Strelnikov - 93e5b134607a554993387ad913e6c1621606004b Release Charmap microbenchmark. by Alex Strelnikov - 95c2e29b6d93ec1334484ee37d91f63101c45307 Release OStringStream microbenchmarks. by Alex Strelnikov - 250f51839ed26dd1e6b658d35aa291413e5f4825 Internal change by Greg Falcon - ce34900fa3d1a95a8446bc943cdd801fac95be25 Improve compatibility of cctz cc_test targets for portabl... by Shaindel Schwartz - ce7e31dbf2c1ee93c79aae5b7dc7c603cb4babcf Improve portability of cc_tests. (Mark more tests that ca... by Abseil Team - dfcd4e455923703c1a1dcd523c5f915f7990fa2a Accept strings with custom allocators as arguments to abs... by Greg Falcon - 2946b41ed3d5b8b5a8dc11182e443cf1ab6e3bde Link against benchmark_main instead of using BENCHMARK_MA... by Alex Strelnikov - f09de9e03bf8edd363069c4b352d8009423f531c Adds link to doc about the formats allowed by SimpleAtof(... by Greg Miller - 59b0977e7a308e0800277886cf60226b2cc426a1 Simplify the HideMask() calculation so that it doesn't us... by Jorg Brown GitOrigin-RevId: e2f6b8ac647271815b4fed2991f405524dd762c3 Change-Id: Ib9c8547ed7fe217fad6cb3ab1362e96181aa5cfa --- absl/strings/internal/char_map_benchmark.cc | 61 +++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 absl/strings/internal/char_map_benchmark.cc (limited to 'absl/strings/internal/char_map_benchmark.cc') diff --git a/absl/strings/internal/char_map_benchmark.cc b/absl/strings/internal/char_map_benchmark.cc new file mode 100644 index 000000000000..c45f3157c291 --- /dev/null +++ b/absl/strings/internal/char_map_benchmark.cc @@ -0,0 +1,61 @@ +// Copyright 2017 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 +// +// http://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/strings/internal/char_map.h" + +#include + +#include "benchmark/benchmark.h" + +namespace { + +absl::strings_internal::Charmap MakeBenchmarkMap() { + absl::strings_internal::Charmap m; + uint32_t x[] = {0x0, 0x1, 0x2, 0x3, 0xf, 0xe, 0xd, 0xc}; + for (uint32_t& t : x) t *= static_cast(0x11111111UL); + for (uint32_t i = 0; i < 256; ++i) { + if ((x[i / 32] >> (i % 32)) & 1) + m = m | absl::strings_internal::Charmap::Char(i); + } + return m; +} + +// Micro-benchmark for Charmap::contains. +void BM_Contains(benchmark::State& state) { + // Loop-body replicated 10 times to increase time per iteration. + // Argument continuously changed to avoid generating common subexpressions. + const absl::strings_internal::Charmap benchmark_map = MakeBenchmarkMap(); + unsigned char c = 0; + int ops = 0; + for (auto _ : state) { + ops += benchmark_map.contains(c++); + ops += benchmark_map.contains(c++); + ops += benchmark_map.contains(c++); + ops += benchmark_map.contains(c++); + ops += benchmark_map.contains(c++); + ops += benchmark_map.contains(c++); + ops += benchmark_map.contains(c++); + ops += benchmark_map.contains(c++); + ops += benchmark_map.contains(c++); + ops += benchmark_map.contains(c++); + } + benchmark::DoNotOptimize(ops); +} +BENCHMARK(BM_Contains); + +// We don't bother benchmarking Charmap::IsZero or Charmap::IntersectsWith; +// their running time is data-dependent and it is not worth characterizing +// "typical" data. + +} // namespace -- cgit 1.4.1