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e340ab8db6
* Units from <ratio> are no longer redeclared in our own namespace * The default clock is `steady_clock`, not `high_resolution_clock`, because, as HH says "high_resolution_clock is useless. If you want measure the passing of time, use steady_clock. If you want user friendly time, use system_clock". * Benchmarking support is opt-in, not opt-out, to avoid the large (~10%) compile time penalty. * Benchmarking-related options in CLI are always present, to decrease the amount of code that is only compiled conditionally and making the whole shebang more maintainble.
406 lines
13 KiB
C++
406 lines
13 KiB
C++
/*
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* Created by Joachim on 16/04/2019.
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* Adapted from donated nonius code.
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*
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* Distributed under the Boost Software License, Version 1.0. (See accompanying
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* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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*/
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#include "catch.hpp"
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#if defined(CATCH_CONFIG_ENABLE_BENCHMARKING)
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namespace {
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struct manual_clock {
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public:
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using duration = std::chrono::nanoseconds;
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using time_point = std::chrono::time_point<manual_clock, duration>;
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using rep = duration::rep;
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using period = duration::period;
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enum { is_steady = true };
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static time_point now() {
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return time_point(duration(tick()));
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}
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static void advance(int ticks = 1) {
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tick() += ticks;
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}
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private:
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static rep& tick() {
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static rep the_tick = 0;
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return the_tick;
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}
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};
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struct counting_clock {
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public:
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using duration = std::chrono::nanoseconds;
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using time_point = std::chrono::time_point<counting_clock, duration>;
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using rep = duration::rep;
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using period = duration::period;
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enum { is_steady = true };
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static time_point now() {
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static rep ticks = 0;
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return time_point(duration(ticks += rate()));
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}
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static void set_rate(rep new_rate) { rate() = new_rate; }
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private:
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static rep& rate() {
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static rep the_rate = 1;
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return the_rate;
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}
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};
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struct TestChronometerModel : Catch::Benchmark::Detail::ChronometerConcept {
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int started = 0;
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int finished = 0;
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void start() override { ++started; }
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void finish() override { ++finished; }
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};
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} // namespace
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TEST_CASE("warmup", "[benchmark]") {
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auto rate = 1000;
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counting_clock::set_rate(rate);
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auto start = counting_clock::now();
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auto iterations = Catch::Benchmark::Detail::warmup<counting_clock>();
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auto end = counting_clock::now();
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REQUIRE((iterations * rate) > Catch::Benchmark::Detail::warmup_time.count());
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REQUIRE((end - start) > Catch::Benchmark::Detail::warmup_time);
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}
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TEST_CASE("resolution", "[benchmark]") {
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auto rate = 1000;
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counting_clock::set_rate(rate);
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size_t count = 10;
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auto res = Catch::Benchmark::Detail::resolution<counting_clock>(static_cast<int>(count));
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REQUIRE(res.size() == count);
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for (size_t i = 1; i < count; ++i) {
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REQUIRE(res[i] == rate);
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}
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}
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TEST_CASE("estimate_clock_resolution", "[benchmark]") {
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auto rate = 1000;
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counting_clock::set_rate(rate);
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int iters = 160000;
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auto res = Catch::Benchmark::Detail::estimate_clock_resolution<counting_clock>(iters);
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REQUIRE(res.mean.count() == rate);
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REQUIRE(res.outliers.total() == 0);
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}
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TEST_CASE("benchmark function call", "[benchmark]") {
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SECTION("without chronometer") {
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auto called = 0;
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auto model = TestChronometerModel{};
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auto meter = Catch::Benchmark::Chronometer{ model, 1 };
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auto fn = Catch::Benchmark::Detail::BenchmarkFunction{ [&] {
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CHECK(model.started == 1);
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CHECK(model.finished == 0);
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++called;
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} };
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fn(meter);
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CHECK(model.started == 1);
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CHECK(model.finished == 1);
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CHECK(called == 1);
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}
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SECTION("with chronometer") {
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auto called = 0;
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auto model = TestChronometerModel{};
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auto meter = Catch::Benchmark::Chronometer{ model, 1 };
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auto fn = Catch::Benchmark::Detail::BenchmarkFunction{ [&](Catch::Benchmark::Chronometer) {
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CHECK(model.started == 0);
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CHECK(model.finished == 0);
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++called;
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} };
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fn(meter);
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CHECK(model.started == 0);
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CHECK(model.finished == 0);
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CHECK(called == 1);
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}
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}
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TEST_CASE("uniform samples", "[benchmark]") {
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std::vector<double> samples(100);
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std::fill(samples.begin(), samples.end(), 23);
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using it = std::vector<double>::iterator;
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auto e = Catch::Benchmark::Detail::bootstrap(0.95, samples.begin(), samples.end(), samples, [](it a, it b) {
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auto sum = std::accumulate(a, b, 0.);
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return sum / (b - a);
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});
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CHECK(e.point == 23);
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CHECK(e.upper_bound == 23);
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CHECK(e.lower_bound == 23);
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CHECK(e.confidence_interval == 0.95);
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}
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TEST_CASE("normal_cdf", "[benchmark]") {
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using Catch::Benchmark::Detail::normal_cdf;
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CHECK(normal_cdf(0.000000) == Approx(0.50000000000000000));
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CHECK(normal_cdf(1.000000) == Approx(0.84134474606854293));
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CHECK(normal_cdf(-1.000000) == Approx(0.15865525393145705));
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CHECK(normal_cdf(2.809729) == Approx(0.99752083845315409));
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CHECK(normal_cdf(-1.352570) == Approx(0.08809652095066035));
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}
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TEST_CASE("erfc_inv", "[benchmark]") {
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using Catch::Benchmark::Detail::erfc_inv;
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CHECK(erfc_inv(1.103560) == Approx(-0.09203687623843015));
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CHECK(erfc_inv(1.067400) == Approx(-0.05980291115763361));
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CHECK(erfc_inv(0.050000) == Approx(1.38590382434967796));
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}
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TEST_CASE("normal_quantile", "[benchmark]") {
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using Catch::Benchmark::Detail::normal_quantile;
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CHECK(normal_quantile(0.551780) == Approx(0.13015979861484198));
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CHECK(normal_quantile(0.533700) == Approx(0.08457408802851875));
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CHECK(normal_quantile(0.025000) == Approx(-1.95996398454005449));
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}
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TEST_CASE("mean", "[benchmark]") {
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std::vector<double> x{ 10., 20., 14., 16., 30., 24. };
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auto m = Catch::Benchmark::Detail::mean(x.begin(), x.end());
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REQUIRE(m == 19.);
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}
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TEST_CASE("weighted_average_quantile", "[benchmark]") {
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std::vector<double> x{ 10., 20., 14., 16., 30., 24. };
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auto q1 = Catch::Benchmark::Detail::weighted_average_quantile(1, 4, x.begin(), x.end());
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auto med = Catch::Benchmark::Detail::weighted_average_quantile(1, 2, x.begin(), x.end());
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auto q3 = Catch::Benchmark::Detail::weighted_average_quantile(3, 4, x.begin(), x.end());
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REQUIRE(q1 == 14.5);
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REQUIRE(med == 18.);
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REQUIRE(q3 == 23.);
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}
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TEST_CASE("classify_outliers", "[benchmark]") {
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auto require_outliers = [](Catch::Benchmark::OutlierClassification o, int los, int lom, int him, int his) {
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REQUIRE(o.low_severe == los);
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REQUIRE(o.low_mild == lom);
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REQUIRE(o.high_mild == him);
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REQUIRE(o.high_severe == his);
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REQUIRE(o.total() == los + lom + him + his);
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};
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SECTION("none") {
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std::vector<double> x{ 10., 20., 14., 16., 30., 24. };
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auto o = Catch::Benchmark::Detail::classify_outliers(x.begin(), x.end());
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REQUIRE(o.samples_seen == static_cast<int>(x.size()));
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require_outliers(o, 0, 0, 0, 0);
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}
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SECTION("low severe") {
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std::vector<double> x{ -12., 20., 14., 16., 30., 24. };
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auto o = Catch::Benchmark::Detail::classify_outliers(x.begin(), x.end());
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REQUIRE(o.samples_seen == static_cast<int>(x.size()));
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require_outliers(o, 1, 0, 0, 0);
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}
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SECTION("low mild") {
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std::vector<double> x{ 1., 20., 14., 16., 30., 24. };
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auto o = Catch::Benchmark::Detail::classify_outliers(x.begin(), x.end());
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REQUIRE(o.samples_seen == static_cast<int>(x.size()));
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require_outliers(o, 0, 1, 0, 0);
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}
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SECTION("high mild") {
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std::vector<double> x{ 10., 20., 14., 16., 36., 24. };
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auto o = Catch::Benchmark::Detail::classify_outliers(x.begin(), x.end());
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REQUIRE(o.samples_seen == static_cast<int>(x.size()));
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require_outliers(o, 0, 0, 1, 0);
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}
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SECTION("high severe") {
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std::vector<double> x{ 10., 20., 14., 16., 49., 24. };
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auto o = Catch::Benchmark::Detail::classify_outliers(x.begin(), x.end());
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REQUIRE(o.samples_seen == static_cast<int>(x.size()));
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require_outliers(o, 0, 0, 0, 1);
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}
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SECTION("mixed") {
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std::vector<double> x{ -20., 20., 14., 16., 39., 24. };
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auto o = Catch::Benchmark::Detail::classify_outliers(x.begin(), x.end());
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REQUIRE(o.samples_seen == static_cast<int>(x.size()));
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require_outliers(o, 1, 0, 1, 0);
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}
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}
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TEST_CASE("analyse", "[benchmark]") {
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Catch::ConfigData data{};
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data.benchmarkConfidenceInterval = 0.95;
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data.benchmarkNoAnalysis = false;
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data.benchmarkResamples = 1000;
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data.benchmarkSamples = 99;
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Catch::Config config{data};
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using Duration = Catch::Benchmark::FloatDuration<Catch::Benchmark::default_clock>;
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Catch::Benchmark::Environment<Duration> env;
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std::vector<Duration> samples(99);
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for (size_t i = 0; i < samples.size(); ++i) {
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samples[i] = Duration(23 + (i % 3 - 1));
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}
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auto analysis = Catch::Benchmark::Detail::analyse(config, env, samples.begin(), samples.end());
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CHECK(analysis.mean.point.count() == 23);
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CHECK(analysis.mean.lower_bound.count() < 23);
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CHECK(analysis.mean.lower_bound.count() > 22);
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CHECK(analysis.mean.upper_bound.count() > 23);
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CHECK(analysis.mean.upper_bound.count() < 24);
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CHECK(analysis.standard_deviation.point.count() > 0.5);
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CHECK(analysis.standard_deviation.point.count() < 1);
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CHECK(analysis.standard_deviation.lower_bound.count() > 0.5);
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CHECK(analysis.standard_deviation.lower_bound.count() < 1);
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CHECK(analysis.standard_deviation.upper_bound.count() > 0.5);
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CHECK(analysis.standard_deviation.upper_bound.count() < 1);
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CHECK(analysis.outliers.total() == 0);
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CHECK(analysis.outliers.low_mild == 0);
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CHECK(analysis.outliers.low_severe == 0);
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CHECK(analysis.outliers.high_mild == 0);
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CHECK(analysis.outliers.high_severe == 0);
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CHECK(analysis.outliers.samples_seen == samples.size());
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CHECK(analysis.outlier_variance < 0.5);
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CHECK(analysis.outlier_variance > 0);
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}
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TEST_CASE("analyse no analysis", "[benchmark]") {
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Catch::ConfigData data{};
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data.benchmarkConfidenceInterval = 0.95;
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data.benchmarkNoAnalysis = true;
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data.benchmarkResamples = 1000;
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data.benchmarkSamples = 99;
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Catch::Config config{ data };
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using Duration = Catch::Benchmark::FloatDuration<Catch::Benchmark::default_clock>;
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Catch::Benchmark::Environment<Duration> env;
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std::vector<Duration> samples(99);
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for (size_t i = 0; i < samples.size(); ++i) {
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samples[i] = Duration(23 + (i % 3 - 1));
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}
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auto analysis = Catch::Benchmark::Detail::analyse(config, env, samples.begin(), samples.end());
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CHECK(analysis.mean.point.count() == 23);
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CHECK(analysis.mean.lower_bound.count() == 23);
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CHECK(analysis.mean.upper_bound.count() == 23);
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CHECK(analysis.standard_deviation.point.count() == 0);
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CHECK(analysis.standard_deviation.lower_bound.count() == 0);
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CHECK(analysis.standard_deviation.upper_bound.count() == 0);
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CHECK(analysis.outliers.total() == 0);
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CHECK(analysis.outliers.low_mild == 0);
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CHECK(analysis.outliers.low_severe == 0);
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CHECK(analysis.outliers.high_mild == 0);
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CHECK(analysis.outliers.high_severe == 0);
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CHECK(analysis.outliers.samples_seen == 0);
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CHECK(analysis.outlier_variance == 0);
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}
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TEST_CASE("run_for_at_least, int", "[benchmark]") {
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manual_clock::duration time(100);
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int old_x = 1;
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auto Timing = Catch::Benchmark::Detail::run_for_at_least<manual_clock>(time, 1, [&old_x](int x) -> int {
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CHECK(x >= old_x);
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manual_clock::advance(x);
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old_x = x;
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return x + 17;
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});
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REQUIRE(Timing.elapsed >= time);
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REQUIRE(Timing.result == Timing.iterations + 17);
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REQUIRE(Timing.iterations >= time.count());
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}
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TEST_CASE("run_for_at_least, chronometer", "[benchmark]") {
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manual_clock::duration time(100);
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int old_runs = 1;
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auto Timing = Catch::Benchmark::Detail::run_for_at_least<manual_clock>(time, 1, [&old_runs](Catch::Benchmark::Chronometer meter) -> int {
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CHECK(meter.runs() >= old_runs);
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manual_clock::advance(100);
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meter.measure([] {
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manual_clock::advance(1);
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});
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old_runs = meter.runs();
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return meter.runs() + 17;
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});
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REQUIRE(Timing.elapsed >= time);
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REQUIRE(Timing.result == Timing.iterations + 17);
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REQUIRE(Timing.iterations >= time.count());
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}
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TEST_CASE("measure", "[benchmark]") {
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auto r = Catch::Benchmark::Detail::measure<manual_clock>([](int x) -> int {
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CHECK(x == 17);
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manual_clock::advance(42);
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return 23;
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}, 17);
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auto s = Catch::Benchmark::Detail::measure<manual_clock>([](int x) -> int {
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CHECK(x == 23);
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manual_clock::advance(69);
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return 17;
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}, 23);
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CHECK(r.elapsed.count() == 42);
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CHECK(r.result == 23);
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CHECK(r.iterations == 1);
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CHECK(s.elapsed.count() == 69);
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CHECK(s.result == 17);
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CHECK(s.iterations == 1);
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}
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TEST_CASE("run benchmark", "[benchmark]") {
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counting_clock::set_rate(1000);
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auto start = counting_clock::now();
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Catch::Benchmark::Benchmark bench{ "Test Benchmark", [](Catch::Benchmark::Chronometer meter) {
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counting_clock::set_rate(100000);
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meter.measure([] { return counting_clock::now(); });
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} };
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bench.run<counting_clock>();
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auto end = counting_clock::now();
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CHECK((end - start).count() == 2867251000);
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}
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#endif // CATCH_CONFIG_ENABLE_BENCHMARKING
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