126 lines
3.4 KiB
C++
126 lines
3.4 KiB
C++
// X20-BenchmarkingMacros.cpp
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// Test that the benchmarking support macros compile properly with the single header
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#define CATCH_CONFIG_MAIN
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#include <catch2/catch.hpp>
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namespace {
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std::uint64_t factorial(std::uint64_t number) {
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if (number < 2) {
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return 1;
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}
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return number * factorial(number - 1);
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}
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}
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TEST_CASE("Benchmark factorial", "[benchmark]") {
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CHECK(factorial(0) == 1);
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// some more asserts..
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CHECK(factorial(10) == 3628800);
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BENCHMARK("factorial 10") {
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return factorial(10);
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};
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CHECK(factorial(14) == 87178291200ull);
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BENCHMARK("factorial 14") {
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return factorial(14);
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};
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}
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TEST_CASE("Benchmark containers", "[.][benchmark]") {
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static const int size = 100;
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std::vector<int> v;
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std::map<int, int> m;
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SECTION("without generator") {
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BENCHMARK("Load up a vector") {
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v = std::vector<int>();
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for (int i = 0; i < size; ++i)
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v.push_back(i);
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};
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REQUIRE(v.size() == size);
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// test optimizer control
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BENCHMARK("Add up a vector's content") {
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uint64_t add = 0;
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for (int i = 0; i < size; ++i)
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add += v[i];
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return add;
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};
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BENCHMARK("Load up a map") {
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m = std::map<int, int>();
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for (int i = 0; i < size; ++i)
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m.insert({ i, i + 1 });
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};
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REQUIRE(m.size() == size);
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BENCHMARK("Reserved vector") {
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v = std::vector<int>();
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v.reserve(size);
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for (int i = 0; i < size; ++i)
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v.push_back(i);
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};
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REQUIRE(v.size() == size);
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BENCHMARK("Resized vector") {
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v = std::vector<int>();
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v.resize(size);
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for (int i = 0; i < size; ++i)
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v[i] = i;
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};
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REQUIRE(v.size() == size);
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int array[size];
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BENCHMARK("A fixed size array that should require no allocations") {
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for (int i = 0; i < size; ++i)
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array[i] = i;
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};
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int sum = 0;
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for (int i = 0; i < size; ++i)
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sum += array[i];
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REQUIRE(sum > size);
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SECTION("XYZ") {
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BENCHMARK_ADVANCED("Load up vector with chronometer")(Catch::Benchmark::Chronometer meter) {
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std::vector<int> k;
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meter.measure([&](int idx) {
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k = std::vector<int>();
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for (int i = 0; i < size; ++i)
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k.push_back(idx);
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});
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REQUIRE(k.size() == size);
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};
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int runs = 0;
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BENCHMARK("Fill vector indexed", benchmarkIndex) {
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v = std::vector<int>();
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v.resize(size);
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for (int i = 0; i < size; ++i)
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v[i] = benchmarkIndex;
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runs = benchmarkIndex;
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};
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for (size_t i = 0; i < v.size(); ++i) {
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REQUIRE(v[i] == runs);
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}
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}
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}
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SECTION("with generator") {
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auto generated = GENERATE(range(0, 10));
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BENCHMARK("Fill vector generated") {
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v = std::vector<int>();
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v.resize(size);
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for (int i = 0; i < size; ++i)
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v[i] = generated;
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};
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for (size_t i = 0; i < v.size(); ++i) {
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REQUIRE(v[i] == generated);
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}
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}
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}
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