6 best C++ Performance Testing libraries in 2025

Testing applications for performance issues, known as performance testing, is essential to project success. A performance test replicates real-life conditions by simulating production loads on the application to see how the application behaves and responds. Performance testing reveals potential issues that could cause performance problems or downtime in production environments, so these issues can be addressed before they impact end users. There are many tools you can use for benchmarking in C++. Some are open-source and available for free, while others are proprietary tools that must be purchased to access their full functionality. Here is a list of the six best C++ performance testing libraries in 2022 sltbench - C benchmark tool; StronglyUniversalStringHashing - Benchmark showing the we can randomly hash strings.