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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,30 @@ | ||
| # Observable Library | ||
| # Copyright (C) 2018 David Capello | ||
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| include(ExternalProject) | ||
| ExternalProject_Add(googlebenchmark-project | ||
| URL https://github.com/google/benchmark/archive/master.zip | ||
| PREFIX "${CMAKE_BINARY_DIR}/googlebenchmark" | ||
| INSTALL_DIR "${CMAKE_BINARY_DIR}/googlebenchmark" | ||
| BUILD_BYPRODUCTS "${CMAKE_BINARY_DIR}/googlebenchmark/lib/${CMAKE_STATIC_LIBRARY_PREFIX}benchmark${CMAKE_STATIC_LIBRARY_SUFFIX}" | ||
| CMAKE_CACHE_ARGS | ||
| -DBENCHMARK_ENABLE_GTEST_TESTS:BOOL=OFF | ||
| -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE} | ||
| -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR> | ||
| -DCMAKE_INSTALL_LIBDIR:PATH=<INSTALL_DIR>/lib) | ||
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| ExternalProject_Get_Property(googlebenchmark-project install_dir) | ||
| set(GOOGLEBENCHMARK_INCLUDE_DIRS ${install_dir}/include) | ||
| set(GOOGLEBENCHMARK_LIBRARY ${install_dir}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}benchmark${CMAKE_STATIC_LIBRARY_SUFFIX}) | ||
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| # Create the directory so changing INTERFACE_INCLUDE_DIRECTORIES doesn't fail | ||
| file(MAKE_DIRECTORY ${GOOGLEBENCHMARK_INCLUDE_DIRS}) | ||
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| add_library(googlebenchmark STATIC IMPORTED) | ||
| set_target_properties(googlebenchmark PROPERTIES | ||
| IMPORTED_LOCATION ${GOOGLEBENCHMARK_LIBRARY} | ||
| INTERFACE_INCLUDE_DIRECTORIES ${GOOGLEBENCHMARK_INCLUDE_DIRS}) | ||
| add_dependencies(googlebenchmark googlebenchmark-project) | ||
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| add_executable(obs_benchmarks obs_benchmarks.cpp) | ||
| target_link_libraries(obs_benchmarks obs googlebenchmark) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| // Observable Library | ||
| // Copyright (c) 2018 David Capello | ||
| // | ||
| // This file is released under the terms of the MIT license. | ||
| // Read LICENSE.txt for more information. | ||
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| #include "obs.h" | ||
| #include <benchmark/benchmark.h> | ||
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| #include <atomic> | ||
| #include <condition_variable> | ||
| #include <future> | ||
| #include <thread> | ||
| #include <vector> | ||
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| static void BM_ObsCreation(benchmark::State& state) { | ||
| for (auto _ : state) { | ||
| state.PauseTiming(); | ||
| { | ||
| obs::signal<void()> sig; | ||
| state.ResumeTiming(); | ||
| } | ||
| } | ||
| } | ||
| BENCHMARK(BM_ObsCreation); | ||
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| static void BM_ObsConnect(benchmark::State& state) { | ||
| obs::signal<void()> sig; | ||
| for (auto _ : state) | ||
| sig.connect([]{ }); | ||
| } | ||
| BENCHMARK(BM_ObsConnect); | ||
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| static void BM_ObsDisconnect(benchmark::State& state) { | ||
| obs::signal<void()> sig; | ||
| for (auto _ : state) { | ||
| state.PauseTiming(); | ||
| obs::connection c = sig.connect([]{ }); | ||
| state.ResumeTiming(); | ||
| c.disconnect(); | ||
| } | ||
| } | ||
| BENCHMARK(BM_ObsDisconnect); | ||
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| static void BM_ObsSignal(benchmark::State& state) { | ||
| obs::signal<void()> sig; | ||
| std::vector<obs::scoped_connection> conns(state.range(0)); | ||
| for (auto& c : conns) | ||
| c = sig.connect([]{ }); | ||
| for (auto _ : state) { | ||
| sig(); | ||
| } | ||
| } | ||
| BENCHMARK(BM_ObsSignal)->Range(1, 1024); | ||
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| static void BM_ObsThreads(benchmark::State& state) { | ||
| obs::signal<void()> sig; | ||
| for (auto _ : state) { | ||
| state.PauseTiming(); | ||
| std::vector<std::thread> threads; | ||
| std::atomic<int> count = { 0 }; | ||
| for (int i=0; i<state.range(0); ++i) { | ||
| threads.emplace_back( | ||
| [&sig, &count]{ | ||
| std::mutex m; | ||
| std::unique_lock<std::mutex> l(m); | ||
| std::condition_variable cv; | ||
| obs::scoped_connection c = | ||
| sig.connect( | ||
| [&m, &cv]{ | ||
| std::unique_lock<std::mutex> l(m); | ||
| cv.notify_one(); | ||
| }); | ||
| ++count; | ||
| cv.wait(l); | ||
| }); | ||
| } | ||
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| // Wait that all threads are created and waiting for the signal. | ||
| while (count < state.range(0)) | ||
| std::this_thread::yield(); | ||
| state.ResumeTiming(); | ||
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| sig(); | ||
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| state.PauseTiming(); | ||
| for (auto& t : threads) | ||
| t.join(); | ||
| state.ResumeTiming(); | ||
| } | ||
| } | ||
| BENCHMARK(BM_ObsThreads)->Range(1, 1024); | ||
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| BENCHMARK_MAIN(); |