c81bfc61da
``` --------------------------------------------------- Benchmark old new --------------------------------------------------- bm_for_each/1 3.00 ns 2.98 ns bm_for_each/2 4.53 ns 4.57 ns bm_for_each/3 5.82 ns 5.82 ns bm_for_each/4 6.94 ns 6.91 ns bm_for_each/5 7.55 ns 7.75 ns bm_for_each/6 7.06 ns 7.45 ns bm_for_each/7 6.69 ns 7.14 ns bm_for_each/8 6.86 ns 4.06 ns bm_for_each/16 11.5 ns 5.73 ns bm_for_each/64 43.7 ns 4.06 ns bm_for_each/512 356 ns 7.98 ns bm_for_each/4096 2787 ns 53.6 ns bm_for_each/32768 20836 ns 438 ns bm_for_each/262144 195362 ns 4945 ns bm_for_each/1048576 685482 ns 19822 ns ``` Reviewed By: ldionne, Mordante, #libc Spies: bgraur, sberg, arichardson, libcxx-commits Differential Revision: https://reviews.llvm.org/D151274
24 lines
835 B
C++
24 lines
835 B
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include <algorithm>
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#include <benchmark/benchmark.h>
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#include <deque>
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static void bm_deque_for_each(benchmark::State& state) {
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std::deque<char> vec1(state.range(), '1');
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for (auto _ : state) {
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benchmark::DoNotOptimize(vec1);
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benchmark::DoNotOptimize(
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std::for_each(vec1.begin(), vec1.end(), [](char& v) { v = std::clamp(v, (char)10, (char)100); }));
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}
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}
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BENCHMARK(bm_deque_for_each)->DenseRange(1, 8)->Range(16, 1 << 20);
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BENCHMARK_MAIN();
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