src/bench/Examples.cpp

   1 // Copyright (c) 2015-2017 The Bitcoin Core developers
   2 // Distributed under the MIT software license, see the accompanying
   3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   4
   5 #include <bench/bench.h>
   6 #include <validation.h>
   7 #include <utiltime.h>
   8
   9 // Sanity test: this should loop ten times, and
  10 // min/max/average should be close to 100ms.
  11 static void Sleep100ms(benchmark::State& state)
  12 {
  13     while (state.KeepRunning()) {
  14         MilliSleep(100);
  15     }
  16 }
  17
  18 BENCHMARK(Sleep100ms, 10);
  19
  20 // Extremely fast-running benchmark:
  21 #include <math.h>
  22
  23 volatile double sum = 0.0; // volatile, global so not optimized away
  24
  25 static void Trig(benchmark::State& state)
  26 {
  27     double d = 0.01;
  28     while (state.KeepRunning()) {
  29         sum += sin(d);
  30         d += 0.000001;
  31     }
  32 }
  33
  34 BENCHMARK(Trig, 12 * 1000 * 1000);