library/cpp/pop_count/benchmark/main.cpp


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#include <util/stream/output.h> 
#include <util/datetime/cputimer.h> 
#include <util/system/type_name.h>
 
#include <library/cpp/pop_count/popcount.h>
#include <library/cpp/testing/benchmark/bench.h>
 
template <class F, class I> 
inline void DoRun(F&& f, I&& i) { 
    const ui64 n = i.Iterations(); 
 
    for (ui64 j = 0; j < n; ++j) {
        Y_DO_NOT_OPTIMIZE_AWAY(f(j * (ui64)123456 + (ui64)1));
    } 
} 
 
Y_CPU_BENCHMARK(PopCount_8, iface) { 
    DoRun([](ui8 x) { 
        return PopCount<ui8>(x); 
    }, 
          iface); 
} 
 
Y_CPU_BENCHMARK(PopCount_16, iface) { 
    DoRun([](ui16 x) { 
        return PopCount<ui16>(x); 
    }, 
          iface); 
} 
 
Y_CPU_BENCHMARK(PopCount_32, iface) { 
    DoRun([](ui32 x) { 
        return PopCount<ui32>(x); 
    }, 
          iface); 
} 
 
Y_CPU_BENCHMARK(PopCount_64, iface) { 
    DoRun([](ui64 x) { 
        return PopCount<ui64>(x); 
    }, 
          iface); 
} 
 
#if !defined(_MSC_VER) 
Y_CPU_BENCHMARK(BUILTIN_64, iface) { 
    DoRun([](ui64 x) { 
        return __builtin_popcountll(x); 
    }, 
          iface); 
} 
#endif