Dominik Meyer
f637c3cee6
git-subtree-dir: libs/loguru git-subtree-split: 9c2fea0d4530657f23259be4132f8101c98b579e
122 lines
3.2 KiB
C++
122 lines
3.2 KiB
C++
#include <chrono>
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#include <cmath>
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#include <iomanip>
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#include <iostream>
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#include <vector>
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#define LOGURU_WITH_STREAMS 1
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#define LOGURU_REDEFINE_ASSERT 1
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#include "../loguru.cpp"
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const size_t kNumRuns = 10;
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const double kPi = 3.1415926535897932384626433;
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static long long now_ns()
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{
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using namespace std::chrono;
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return duration_cast<nanoseconds>(high_resolution_clock::now().time_since_epoch()).count();
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}
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template<typename Function>
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void bench(const std::string& name, const Function& function, size_t num_iterations)
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{
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function(num_iterations); // Warm-up.
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printf("%-30s ", name.c_str());
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fflush(stdout);
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std::vector<double> times;
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double sum = 0;
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for (size_t i = 0; i < kNumRuns; ++i) {
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auto start_ns = now_ns();
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function(num_iterations);
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double total_time_sec = (now_ns() - start_ns) * 1e-9;
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times.push_back(total_time_sec / num_iterations);
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sum += times.back();
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}
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double mean = sum / kNumRuns;
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double std_dev_sum = 0;
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for (double time : times) {
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std_dev_sum += (time - mean) * (time - mean);
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}
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double variance = std::sqrt(std_dev_sum / kNumRuns);
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printf("%6.3f ± %.3f μs per call\n", mean * 1e6, variance * 1e6);
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fflush(stdout);
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}
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// ----------------------------------------------------------------------------
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void format_strings(size_t num_iterations)
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{
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for (size_t i = 0; i < num_iterations; ++i) {
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LOG_F(WARNING, "Some long, complex message.");
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}
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loguru::flush();
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}
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void format_float(size_t num_iterations)
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{
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for (size_t i = 0; i < num_iterations; ++i) {
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LOG_F(WARNING, "%+05.3f", kPi);
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}
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loguru::flush();
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}
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void stream_strings(size_t num_iterations)
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{
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for (size_t i = 0; i < num_iterations; ++i) {
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LOG_S(WARNING) << "Some long, complex message.";
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}
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loguru::flush();
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}
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void stream_float(size_t num_iterations)
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{
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for (size_t i = 0; i < num_iterations; ++i) {
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LOG_S(WARNING) << std::setfill('0') << std::setw(5) << std::setprecision(3) << kPi;
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}
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loguru::flush();
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}
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void raw_string_float(size_t num_iterations)
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{
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for (size_t i = 0; i < num_iterations; ++i) {
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RAW_LOG_F(WARNING, "Some long, complex message.");
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}
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loguru::flush();
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}
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void error_context(size_t num_iterations)
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{
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for (size_t i = 0; i < num_iterations; ++i) {
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ERROR_CONTEXT("key", "value");
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}
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}
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int main(int argc, char* argv[])
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{
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const size_t kNumIterations = 50 * 1000;
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loguru::init(argc, argv);
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loguru::add_file("loguru_bench.log", loguru::Truncate, loguru::Verbosity_INFO);
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bench("ERROR_CONTEXT", error_context, kNumIterations * 100);
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loguru::g_flush_interval_ms = 200;
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bench("LOG_F string (buffered):", format_strings, kNumIterations);
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bench("LOG_F float (buffered):", format_float, kNumIterations);
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bench("LOG_S string (buffered):", stream_strings, kNumIterations);
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bench("LOG_S float (buffered):", stream_float, kNumIterations);
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bench("RAW_LOG_F (buffered):", raw_string_float, kNumIterations);
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loguru::g_flush_interval_ms = 0;
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bench("LOG_F string (unbuffered):", format_strings, kNumIterations);
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bench("LOG_F float (unbuffered):", format_float, kNumIterations);
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bench("LOG_S string (unbuffered):", stream_strings, kNumIterations);
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bench("LOG_S float (unbuffered):", stream_float, kNumIterations);
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bench("RAW_LOG_F (unbuffered):", raw_string_float, kNumIterations);
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}
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