Profile-guided optimization

In computer programming, profile-guided optimization (PGO, sometimes pronounced as pogo), also known as profile-directed feedback (PDF) or feedback-directed optimization (FDO), is the compiler optimization technique of using prior analyses of software artifacts or behaviors ("profiling") to improve the expected runtime performance of the program. == Method == Optimization techniques based on static program analysis of the source code consider code performance improvements without actually executing the program.

Source: Wikipedia — Profile-guided optimization (CC BY-SA 4.0)