Notices by CF Bolz-Tereick (cfbolz@mastodon.social)

"Profiling in production with function call traces" - https://yosefk.com/blog/profiling-in-production-with-function-call-traces.html

super interesting and opinionated blog post! It argues for an ideally very cheap, but always on tracing profiler. the profiler keeps a ring buffer of a bunch of function entries and exit and saves it out on user-triggered events. can be used to produce a trace from a core dump, or to debug tail latency ('this event was extra slow? let's dump the ring buffer').

I want to try or reimplement this!

@dalias @regehr @uecker some quick googling turned up this code here: https://github.com/jart/jtckdint uses the C23 intrinsics if available, otherwise has a dropin. is this what the youths call a polyfill?

@erl fascinating thread, thank you!

(this is a bit of a boring question, but what do astrophysicists make their plots with?)

I just merged the PyPy "known bits" JIT optimization that Nico Rittinghaus and I worked on in the last two years. It allows the JIT to reason about specific bits of integer variables that are known to be 0 or 1. This makes bit-manipulation code faster, sometimes significantly so.

A concrete example of something the JIT now knows, but didn't before: if you add two even integers together, you get an even result.

I suppose it's better than the usual news

This table of gestures is so quintessentially Wikipedia somehow 😆

https://en.wikipedia.org/wiki/Template:Gestures

Look, someone clicked 'inspect element' on the street!

@corbin I think what I don't quite understand is why you need a python2 that still gets security updates if it's used exclusively for bootstrapping pypy

@corbin my approach for a build that doesn't depend on "binaries you didn't build yourself" is to build cpython as a build dependency only, then build PyPy with that. That gives you purity, but yes, unfortunately not speed.

"Light from Uncommon Stars" by Ryka Aoki is as good as everyone says. I ended up reading it in one go and am now starting it from the beginning again.

Well dressed older guy at the main station casually chatting on his Motorola Razr, unbothered by all the Discourse

'If you know what a floppy disk is, then it's maybe time to think about burial insurance'

The website of the "Decompiler Explorer" is https://dogbolt.org 😆

@wingo oh yes, that would be excellent