// Copyright (c) 2015 The Bitcoin Core developers // Distributed under the MIT software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. #ifndef BITCOIN_BENCH_BENCH_H #define BITCOIN_BENCH_BENCH_H #include #include #include #include #include // Simple micro-benchmarking framework; API mostly matches a subset of the Google Benchmark // framework (see https://github.com/google/benchmark) // Wny not use the Google Benchmark framework? Because adding Yet Another Dependency // (that uses cmake as its build system and has lots of features we don't need) isn't // worth it. /* * Usage: static void CODE_TO_TIME(benchmark::State& state) { ... do any setup needed... while (state.KeepRunning()) { ... do stuff you want to time... } ... do any cleanup needed... } BENCHMARK(CODE_TO_TIME); */ namespace benchmark { class State { std::string name; double maxElapsed; double beginTime; double lastTime, minTime, maxTime, countMaskInv; int64_t count; int64_t countMask; public: State(std::string _name, double _maxElapsed) : name(_name), maxElapsed(_maxElapsed), count(0) { minTime = std::numeric_limits::max(); maxTime = std::numeric_limits::min(); countMask = 1; countMaskInv = 1./(countMask + 1); } bool KeepRunning(); }; typedef boost::function BenchFunction; class BenchRunner { static std::map<:string benchfunction> benchmarks; public: BenchRunner(std::string name, BenchFunction func); static void RunAll(double elapsedTimeForOne=1.0); }; } // BENCHMARK(foo) expands to: benchmark::BenchRunner bench_11foo("foo", foo); #define BENCHMARK(n) \ benchmark::BenchRunner BOOST_PP_CAT(bench_, BOOST_PP_CAT(__LINE__, n))(BOOST_PP_STRINGIZE(n), n); #endif // BITCOIN_BENCH_BENCH_H