Jerod is joined by the co-hosts of core.py , Pablo Galindo & Łukasz Langa, a podcast about Python internals by people who work on Python internals. Python 3.13 is right around the corner, which means the Global Interpeter Lock (GIL) is now experimentally optional! This is a huge deal as Python is finally free-threaded. There’s more to discuss, of course, so we get into all the gory details.
Featuring
Sponsors
Sentry – Code breaks, fix it faster. Don’t just observe. Take action. Sentry is the only app monitoring platform built for developers that gets to the root cause for every issue. 100,000+ growing teams use sentry to find problems fast. Use the code CHANGELOG when you sign up to get $100 OFF the team plan.
Fly.io – The home of Changelog.com — Deploy your apps close to your users — global Anycast load-balancing, zero-configuration private networking, hardware isolation, and instant WireGuard VPN connections. Push-button deployments that scale to thousands of instances. Check out the speedrun to get started in minutes.
Coder.com – Instantly launch fully configured cloud development environments (CDE) and make your first commit in minutes. No need to traverse README files or await onboarding queues. Learn more at Coder.com
Unblocked – Other developer tools can’t tell you how your codebase works and why. Unblocked can. We augment your code with context from Slack, Confluence, Jira, and more, so you get accurate answers without having to search for them. Sign up for free at getunblocked.com
Notes & Links
Chapters
| Chapter Number | Chapter Start Time | Chapter Title | Chapter Duration |
| 1 | 00:00 | This is The Changelog | 02:01 |
| 2 | 02:01 | Sponsor: Sentry | 01:42 |
| 3 | 03:43 | Start the show! | 00:43 |
| 4 | 04:27 | Starting core.py | 02:55 |
| 5 | 07:22 | Keeping up with Pablo | 01:41 |
| 6 | 09:03 | Magical closed captioning | 01:57 |
| 7 | 11:00 | Shout out to Christian Clauss! | 00:35 |
| 8 | 11:35 | What is the GIL | 02:11 |
| 9 | 13:46 | Working around it | 03:11 |
| 10 | 16:56 | Causes of Python slowness | 04:47 |
| 11 | 21:44 | Sponsor: Fly.io | 03:27 |
| 12 | 25:11 | Sponsor: Coder.com | 02:04 |
| 13 | 27:15 | Worth the effort? | 01:02 |
| 14 | 28:17 | A separate executable | 02:29 |
| 15 | 30:46 | Slower for now or for good? | 03:49 |
| 16 | 34:35 | Early indicators | 04:57 |
| 17 | 39:33 | Time to adopt? | 04:44 |
| 18 | 44:17 | Just-in-time (JIT) compiler | 08:09 |
| 19 | 52:26 | Sponsor: Unblocked | 03:01 |
| 20 | 55:27 | The 1-year release cadence | 14:59 |
| 21 | 1:10:26 | iOS compatibility | 08:16 |
| 22 | 1:18:42 | Wishlists for 3.14 | 04:59 |
| 23 | 1:23:41 | Flyyyy free-threaded (yeah) | 00:54 |
| 24 | 1:24:35 | Coming up next | 02:16 |