WTF is FDO ?

According to wikipedia

Profile-guided optimization (PGO, sometimes pronounced as pogo), also known as profile-directed feedback (PDF) and feedback-directed optimization (FDO) is a compiler optimization technique in computer programming that uses profiling to improve program runtime performance.

What it really means

again from wikipedia:- Optimization techniques based on analysis of the source code.

How to do it ?

Read it AutoFDO tutorial

PostScript

For ML/DL Fanatics But Not Compiler Stuff
Some things I just know

• I know it was really brief, but it was written in a very less time. Because someone told me, “You started really late if you are not disappointed from your first blog. LOL”
• Next time you visit this might be more detailed along with code snippets and internals.