#pypy on 2021-10-10 — irc logs at libera.irclog.whitequark.org

2021-09-24 06:13 cfbolz changed the topic of #pypy to: #pypy PyPy, the flexible snake https://pypy.org | IRC logs: https://quodlibet.duckdns.org/irc/pypy/latest.log.html#irc-end and https://libera.irclog.whitequark.org/pypy | hacking on TLS is fun, way more fun than arguing over petty shit, turns out

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11:46 <cfbolz> arigato: so it's in the same tradition as namedtuple and I suspect dataclasses?

11:54 <mattip> did we do anything to make those fast in PyPy ?

11:54 <cfbolz> mattip: dataclasses? I think they are reasonablish by default

11:55 <cfbolz> might be worth checking

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13:32 <arigato> I'm identifying quadratic behaviours and trying to fix it

13:33 <arigato> it's very easy, just press Ctrl-C and you're in the bad loop

13:33 <arigato> fixed one but there is more actually

13:34 <arigato> enum.py is 1000 lines of Python, so the real issue there will be to make absolutely sure we're not breaking anybody's code

13:42 <arigato> OK fixed two places and it seems to be almost linear now

13:44 <arigato> I'm +0 to apply this fix in pypy now (provided of course all tests are happy)

13:46 <arigato> it does reduce the time to run a big "class" statement (1000 entries) from 0.86 seconds to 0.02 seconds

13:47 <arigato> CPython's performance is 0.11 s -> 0.03 s

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14:51 <cfbolz> arigato: looks good

14:51 <cfbolz> arigato: does it depend on the iteration order of set?

14:52 <cfbolz> Otherwise it's probably a good patch to CPython too?

14:56 <mattip> I will add it to the issue

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16:15 <cfbolz> arigato: I can volunteer to open a pr if you don't feel like it

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