Here is a detailed guide on Performance Testing. Learn how to perform Application Performance Testing, followed best practices, and more. Best Performance Testing Tutorial and Site which helps to provide the core and in-depth knowledge of Performance Testing. What is performance testing? Know this technique used to determine speed, scalability of an application, learn types and process of performance testing too! What is Software Performance Testing? The performance testing is performed to analyze the performance, quality, ability, and scalability of a software. It identifies the issues, and gauges the software performance under different loads, and situations.