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dfe0260754
* Support multiple ranges in the benchmark google-benchmark library allows to provide up to two ranges to the benchmark method (range_x and range_y). However, in many cases it's not sufficient. The patch introduces multi-range features, so user can easily define multiple ranges by passing a vector of integers, and access values through the method range(i). * Remove redundant API Functions State::range_x() and State::range_y() have been removed. They should be replaced by State::range(0) and State::range(1). Functions Benchmark::ArgPair() and Benchmark::RangePair() have been removed. They should be replaced by Benchmark::Args() and Benchmark::Ranges().
59 lines
1.3 KiB
C++
59 lines
1.3 KiB
C++
#include "benchmark/benchmark.h"
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#include <cstdlib>
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#include <map>
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namespace {
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std::map<int, int> ConstructRandomMap(int size) {
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std::map<int, int> m;
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for (int i = 0; i < size; ++i) {
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m.insert(std::make_pair(rand() % size, rand() % size));
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}
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return m;
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}
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} // namespace
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// Basic version.
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static void BM_MapLookup(benchmark::State& state) {
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const int size = state.range(0);
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while (state.KeepRunning()) {
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state.PauseTiming();
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std::map<int, int> m = ConstructRandomMap(size);
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state.ResumeTiming();
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for (int i = 0; i < size; ++i) {
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benchmark::DoNotOptimize(m.find(rand() % size));
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}
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}
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state.SetItemsProcessed(state.iterations() * size);
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}
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BENCHMARK(BM_MapLookup)->Range(1 << 3, 1 << 12);
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// Using fixtures.
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class MapFixture : public ::benchmark::Fixture {
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public:
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void SetUp(const ::benchmark::State& st) {
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m = ConstructRandomMap(st.range(0));
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}
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void TearDown(const ::benchmark::State&) {
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m.clear();
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}
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std::map<int, int> m;
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};
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BENCHMARK_DEFINE_F(MapFixture, Lookup)(benchmark::State& state) {
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const int size = state.range(0);
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while (state.KeepRunning()) {
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for (int i = 0; i < size; ++i) {
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benchmark::DoNotOptimize(m.find(rand() % size));
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}
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}
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state.SetItemsProcessed(state.iterations() * size);
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}
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BENCHMARK_REGISTER_F(MapFixture, Lookup)->Range(1<<3, 1<<12);
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BENCHMARK_MAIN()
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