FastRandom benchmark

Author: sipa

src/bench/crypto_hash.cpp

@@ -7,6 +7,7 @@
 #include "bench.h"
 #include "bloom.h"
 #include "hash.h"
+#include "random.h"
 #include "uint256.h"
 #include "utiltime.h"
 #include "crypto/ripemd160.h"
@@ -69,10 +70,34 @@ static void SipHash_32b(benchmark::State& state)
     }
 }
 
+static void FastRandom_32bit(benchmark::State& state)
+{
+    FastRandomContext rng(true);
+    uint32_t x;
+    while (state.KeepRunning()) {
+        for (int i = 0; i < 1000000; i++) {
+            x += rng.rand32();
+        }
+    }
+}
+
+static void FastRandom_1bit(benchmark::State& state)
+{
+    FastRandomContext rng(true);
+    uint32_t x;
+    while (state.KeepRunning()) {
+        for (int i = 0; i < 1000000; i++) {
+            x += rng.randbool();
+        }
+    }
+}
+
 BENCHMARK(RIPEMD160);
 BENCHMARK(SHA1);
 BENCHMARK(SHA256);
 BENCHMARK(SHA512);
 
 BENCHMARK(SHA256_32b);
 BENCHMARK(SipHash_32b);
+BENCHMARK(FastRandom_32bit);
+BENCHMARK(FastRandom_1bit);