We've read the PEP on making the Global Interpreter Lock optional so you don't have to.

Timestamps

(00:00:00 ) Intro

(00:00:50 ) CURRENT STATE OF THINGS

(00:00:58 ) Reference counting

(00:01:35 ) Garbage collection

(00:02:33 ) What is the Global Interpreter Lock?

(00:03:57 ) The GIL and threading

(00:07:24 ) Current ways around the GIL

(00:09:26 ) HISTORICAL ATTEMPTS TO REMOVE THE GIL

(00:09:46 ) 1999: Greg Stein's attempt at Python 1.6

(00:10:46 ) Jython doesn't have the GIL

(00:11:19 ) 2015: Larry Hastings' Gilectomy at Python 3.5

(00:12:34 ) Pablo says removing the GIL is actually very easy

(00:13:24 ) Łukasz is skeptical

(00:14:20 ) 2021: Sam Gross' nogil at Python 3.9

(00:18:22 ) 2023: PEP 703 for Python 3.13

(00:20:05 ) PEP 703 IN DETAIL

(00:20:20 ) Biased Reference Counting

(00:25:19 ) Other needed speedups: deferred refcounts, immortalization, GC

(00:28:41 ) mimalloc

(00:34:46 ) More GC changes

(00:38:20 ) eval breaker

(00:42:08 ) Thread-safe standard collections

(00:45:26 ) Fast paths vs. slow paths

(00:49:47 ) Reading freed memory with mimalloc is kinda okay?

(00:58:06 ) Specializations become harder to implement without the GIL

(01:01:27 ) PEP 703 terms of acceptance

(01:04:08 ) No free lunch

(01:09:25 ) It's now or never

(01:11:59 ) Outro