Python 3.14? That's old news. Let's talk about the first big feature of Python 3.15 -- a built-in sampling profiler for Linux, macOS, and Windows. We also cover improvements in perf support, discuss memory.python.org, and as usual, recent changes in the codebase.
## Timestamps
(00:00:00) INTRO
(00:02:43) PART 1: THE SAMPLING PROFILER
(00:05:07) Built-in profile is bad, long live cProfile
(00:10:54) Out-of-process profiling
(00:12:18) Shortcuts Compromise Accuracy, Leading Eventually to Numerous Errors
(00:16:07) Selfish Łukasz vs benevolent Pablo
(00:23:11) How does a sampling profiler even work?
(00:30:42) One meeellion huuurtzzz
(00:32:40) Free threading makes it extra spicy
(00:41:26) AsyncIO makes it even spicier
(00:49:49) You made this? I made this
(00:54:06) What if the profiled process changes during sampling?
(00:57:33) Coming in October 2026
(01:04:30) PART 2: PR OF THE WEEEEEEK
(01:14:14) memory.python.org launched
(01:23:15) PART 3: WHAT'S GOING ON IN CPYTHON
(01:26:45) Performance updates
(01:30:24) Features & Curiosities
(01:41:45) OUTRO
