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Diffstat (limited to 'src/bench/bench.h')
-rw-r--r-- | src/bench/bench.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/src/bench/bench.h b/src/bench/bench.h new file mode 100644 index 0000000000..5ce13c642b --- /dev/null +++ b/src/bench/bench.h @@ -0,0 +1,72 @@ +// 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 <map> +#include <string> + +#include <boost/function.hpp> +#include <boost/preprocessor/cat.hpp> +#include <boost/preprocessor/stringize.hpp> + +// 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; + int64_t count; + int64_t timeCheckCount; + public: + State(std::string _name, double _maxElapsed) : name(_name), maxElapsed(_maxElapsed), count(0) { + minTime = std::numeric_limits<double>::max(); + maxTime = std::numeric_limits<double>::min(); + timeCheckCount = 1; + } + bool KeepRunning(); + }; + + typedef boost::function<void(State&)> BenchFunction; + + class BenchRunner + { + static std::map<std::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 |