PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML. Performance testing is a very important and integral part of any software development project. It’s a process in which the application is tested under real-life conditions that imitate the production environment to determine how it behaves when subjected to different loads. The main goal of this type of testing is to find and fix issues before they happen in production, preventing performance issues in production and possible downtime.
This PHP Performance Testing Open Source libraries then this list will show you how to get started with some of the most popular ones Phoronix - Test Suite opensource, crossplatform automated testing; doctrine-test-bundle - Symfony bundle to isolate your app's doctrine database tests; daytona - applicationagnostic framework for automated performance testing.