Merge pull request #6733

7072c54 Support very-fast-running benchmarks (Gavin Andresen)
535ed92 Simple benchmarking framework (Gavin Andresen)

1 files changed, 34 insertions, 0 deletions

diff --git a/src/bench/Examples.cpp b/src/bench/Examples.cpp
new file mode 100644
index 0000000000..b6b020a971
--- /dev/null
+++ b/src/bench/Examples.cpp
@@ -0,0 +1,34 @@
+// 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.
+
+#include "bench.h"
+#include "main.h"
+#include "utiltime.h"
+
+// Sanity test: this should loop ten times, and
+// min/max/average should be close to 100ms.
+static void Sleep100ms(benchmark::State& state)
+{
+    while (state.KeepRunning()) {
+        MilliSleep(100);
+    }
+}
+
+BENCHMARK(Sleep100ms);
+
+// Extremely fast-running benchmark:
+#include <math.h>
+
+volatile double sum = 0.0; // volatile, global so not optimized away
+
+static void Trig(benchmark::State& state)
+{
+    double d = 0.01;
+    while (state.KeepRunning()) {
+        sum += sin(d);
+        d += 0.000001;
+    }
+}
+
+BENCHMARK(Trig);