https://oscourse.win

Looks like fedora is compiling cpython with the -o3 flag, which does aggressive function inlining among other optimizations.

This seems to improve python benchmarks performance by at most 1.16x at a cost of an extra 3MB in binary size (text segment). Although it does seem to slow down some benchmarks as well though not significantly.

O1 - local register allocation, subexpression elimination

O2 - Function inlining only small functions

O3 - Agressive inlining, SMID

0:00 Intro

1:00 Fedora Linux gets Fast Python

5:40 What is Compiling?

9:00 Compiling with No Optimization

12:10 Compiling with -O1

15:30 Compiling with -O2

20:00 Compiling with -O3

23:20 Showing Numbers

Backend Troubleshooting Course

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