benchmark minimum and maximum execution time of functions

Signed-off-by: Anjan Roy <[email protected]>

benchmarks/bench_common.hpp

@@ -0,0 +1,12 @@
+#pragma once
+
+#include <algorithm>
+#include <vector>
+
+const auto compute_min = [](const std::vector<double>& v) -> double {
+  return *std::min_element(v.begin(), v.end());
+};
+
+const auto compute_max = [](const std::vector<double>& v) -> double {
+  return *std::max_element(v.begin(), v.end());
+};

benchmarks/bench_hashing.cpp

@@ -1,9 +1,9 @@
+#include "bench_common.hpp"
 #include "sha3_224.hpp"
 #include "sha3_256.hpp"
 #include "sha3_384.hpp"
 #include "sha3_512.hpp"
 #include <benchmark/benchmark.h>
-#include <vector>
 
 // Benchmarks SHA3-224 hash function with variable length input message.
 void
@@ -136,16 +136,24 @@ bench_sha3_512(benchmark::State& state)
 BENCHMARK(bench_sha3_224)
   ->RangeMultiplier(4)
   ->Range(64, 16384)
-  ->Name("sha3_224");
+  ->Name("sha3_224")
+  ->ComputeStatistics("min", compute_min)
+  ->ComputeStatistics("max", compute_max);
 BENCHMARK(bench_sha3_256)
   ->RangeMultiplier(4)
   ->Range(64, 16384)
-  ->Name("sha3_256");
+  ->Name("sha3_256")
+  ->ComputeStatistics("min", compute_min)
+  ->ComputeStatistics("max", compute_max);
 BENCHMARK(bench_sha3_384)
   ->RangeMultiplier(4)
   ->Range(64, 16384)
-  ->Name("sha3_384");
+  ->Name("sha3_384")
+  ->ComputeStatistics("min", compute_min)
+  ->ComputeStatistics("max", compute_max);
 BENCHMARK(bench_sha3_512)
   ->RangeMultiplier(4)
   ->Range(64, 16384)
-  ->Name("sha3_512");
+  ->Name("sha3_512")
+  ->ComputeStatistics("min", compute_min)
+  ->ComputeStatistics("max", compute_max);

benchmarks/bench_keccak.cpp

@@ -1,3 +1,4 @@
+#include "bench_common.hpp"
 #include "keccak.hpp"
 #include "utils.hpp"
 #include <benchmark/benchmark.h>
@@ -24,4 +25,7 @@ bench_keccak_permutation(benchmark::State& state)
 #endif
 }
 
-BENCHMARK(bench_keccak_permutation)->Name("keccak-p[1600, 24]");
+BENCHMARK(bench_keccak_permutation)
+  ->Name("keccak-p[1600, 24]")
+  ->ComputeStatistics("min", compute_min)
+  ->ComputeStatistics("max", compute_max);

benchmarks/bench_xof.cpp

@@ -1,7 +1,7 @@
+#include "bench_common.hpp"
 #include "shake128.hpp"
 #include "shake256.hpp"
 #include <benchmark/benchmark.h>
-#include <vector>
 
 // Benchmarks SHAKE-128 extendable output function with variable length input
 // and squeezed output.
@@ -77,7 +77,11 @@ bench_shake256(benchmark::State& state)
 
 BENCHMARK(bench_shake128)
   ->ArgsProduct({ benchmark::CreateRange(64, 16384, 4), { 64 } })
-  ->Name("shake128");
+  ->Name("shake128")
+  ->ComputeStatistics("min", compute_min)
+  ->ComputeStatistics("max", compute_max);
 BENCHMARK(bench_shake256)
   ->ArgsProduct({ benchmark::CreateRange(64, 16384, 4), { 64 } })
-  ->Name("shake256");
+  ->Name("shake256")
+  ->ComputeStatistics("min", compute_min)
+  ->ComputeStatistics("max", compute_max);