Overview

Benchmark is a lightweight C++ library for reliable benchmarking your code. Features:

• Variable arguments
• Auto CPU warm up
• "Do not optimize" macro
• CPU frequency scaling detection
• CMake support

Platforms: Linux. Not tested on Windows.

Quick start

Example

#include <benchmark/benchmark.h>

BENCHMARK("My vector") {
    std::vector<int> v;
    v.reserve(N);
    
    MEASURE(
        REPEAT(64) { v.push_back(i); }
    )
}

BENCHMARK_MAIN

Notes

Things that may interfere with a benchmark

• Heavy applications such as a browser, IDE, VM. Better to shut those down before running a benchmark.

• Notebook unplugged to power source.

• CPU frequency scaling, powersafe mode

  sudo cpupower frequency-set --governor performance

  You may also know your real current frequency on: Linux: i7z Windows: Task Manager, Performance tab.

• Swapping.

• Compiler optimizations.