Improved microbenchmarking with multiple features.

* inline performance critical code
* Average runtime is specified and used to calculate iterations.
* Console: show median of multiple runs
* plot: show box plot
* filter benchmarks
* specify scaling factor
* ignore src/test and src/bench in command line check script
* number of iterations instead of time
* Replaced runtime in BENCHMARK makro number of iterations.
* Added -? to bench_bitcoin
* Benchmark plotly.js URL, width, height can be customized
* Fixed incorrect precision warning

1 files changed, 15 insertions, 20 deletions

diff --git a/src/bench/crypto_hash.cpp b/src/bench/crypto_hash.cpp
index b37b5cad62..bb89718074 100644
--- a/src/bench/crypto_hash.cpp
+++ b/src/bench/crypto_hash.cpp
@@ -46,9 +46,9 @@ static void SHA256_32b(benchmark::State& state)
 {
     std::vector<uint8_t> in(32,0);
     while (state.KeepRunning()) {
-        for (int i = 0; i < 1000000; i++) {
-            CSHA256().Write(in.data(), in.size()).Finalize(in.data());
-        }
+        CSHA256()
+            .Write(in.data(), in.size())
+            .Finalize(in.data());
     }
 }
 
@@ -63,10 +63,9 @@ static void SHA512(benchmark::State& state)
 static void SipHash_32b(benchmark::State& state)
 {
     uint256 x;
+    uint64_t k1 = 0;
     while (state.KeepRunning()) {
-        for (int i = 0; i < 1000000; i++) {
-            *((uint64_t*)x.begin()) = SipHashUint256(0, i, x);
-        }
+        *((uint64_t*)x.begin()) = SipHashUint256(0, ++k1, x);
     }
 }
 
@@ -75,9 +74,7 @@ static void FastRandom_32bit(benchmark::State& state)
     FastRandomContext rng(true);
     uint32_t x = 0;
     while (state.KeepRunning()) {
-        for (int i = 0; i < 1000000; i++) {
-            x += rng.rand32();
-        }
+        x += rng.rand32();
     }
 }
 
@@ -86,18 +83,16 @@ static void FastRandom_1bit(benchmark::State& state)
     FastRandomContext rng(true);
     uint32_t x = 0;
     while (state.KeepRunning()) {
-        for (int i = 0; i < 1000000; i++) {
-            x += rng.randbool();
-        }
+        x += rng.randbool();
     }
 }
 
-BENCHMARK(RIPEMD160);
-BENCHMARK(SHA1);
-BENCHMARK(SHA256);
-BENCHMARK(SHA512);
+BENCHMARK(RIPEMD160, 440);
+BENCHMARK(SHA1, 570);
+BENCHMARK(SHA256, 340);
+BENCHMARK(SHA512, 330);
 
-BENCHMARK(SHA256_32b);
-BENCHMARK(SipHash_32b);
-BENCHMARK(FastRandom_32bit);
-BENCHMARK(FastRandom_1bit);
+BENCHMARK(SHA256_32b, 4700 * 1000);
+BENCHMARK(SipHash_32b, 40 * 1000 * 1000);
+BENCHMARK(FastRandom_32bit, 110 * 1000 * 1000);
+BENCHMARK(FastRandom_1bit, 440 * 1000 * 1000);