Compiler Flags and Optimization

Lesson overview

Topics covered: -O0 -O1 -O2 -O3 -Os -Og, profile guided optimization, strict aliasing.

Compiler Flags and Optimization

-O0 - no optimization, debugging friendly
-O1 - some optimization, faster than -O0
-O2 - aggressive optimization (default)
-O3 - maximum optimization
-Os - optimize for size
-Og - optimize for debugging
-ffast-math - faster math (may break standards compliance)

Article author: Arthur Isaev