Stats benchmarks

nano/benchmarks/CMakeLists.txt

@@ -1,4 +1,4 @@
-add_executable(benchmarks entry.cpp)
+add_executable(benchmarks entry.cpp stats.cpp)
 
 target_link_libraries(benchmarks test_common benchmark::benchmark)
 

nano/benchmarks/stats.cpp

@@ -0,0 +1,49 @@
+#include <nano/lib/enum_util.hpp>
+#include <nano/lib/logging.hpp>
+#include <nano/lib/stats.hpp>
+
+#include <random>
+
+#include <benchmark/benchmark.h>
+
+static void BM_stats_inc_single (benchmark::State & state)
+{
+	nano::logger logger;
+	nano::stats stats{ logger };
+
+	for (auto _ : state)
+	{
+		stats.inc (nano::stat::type::ledger, nano::stat::detail::open);
+	}
+}
+
+BENCHMARK (BM_stats_inc_single);
+BENCHMARK (BM_stats_inc_single)->Threads (10);
+
+static void BM_stats_inc_random (benchmark::State & state)
+{
+	nano::logger logger;
+	nano::stats stats{ logger };
+
+	auto random_subset = [] (auto elements, size_t count) -> std::vector<typename decltype (elements)::value_type> {
+		std::shuffle (elements.begin (), elements.end (), std::mt19937 (std::random_device () ()));
+		return { elements.begin (), elements.begin () + std::min (count, elements.size ()) };
+	};
+
+	auto stat_types = random_subset (nano::enum_util::values<nano::stat::type> (), state.range (0));
+	auto stat_details = random_subset (nano::enum_util::values<nano::stat::detail> (), state.range (1));
+
+	size_t type_index = 0;
+	size_t detail_index = 0;
+
+	for (auto _ : state)
+	{
+		stats.inc (stat_types[type_index], stat_details[detail_index]);
+
+		type_index = (type_index + 1) % stat_types.size ();
+		detail_index = (detail_index + 1) % stat_details.size ();
+	}
+}
+
+BENCHMARK (BM_stats_inc_random)->Args ({ 32, 32 });
+BENCHMARK (BM_stats_inc_random)->Args ({ 32, 32 })->Threads (10);