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Nix Package Manager development

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For people hacking on Nix: https://github.com/NixOS/nix Nix maintainers can be reached here.180 Servers

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28 Jul 2025
@Ericson2314:matrix.orgJohn Ericsonyes, parsing does become more expensive14:16:48
@Ericson2314:matrix.orgJohn Ericsonbut other things become less expensive14:16:53
@Ericson2314:matrix.orgJohn Ericsonand it should be some O(drvs) thing either way14:17:06
@xokdvium:matrix.orgSergei Zimmerman (xokdvium)
In reply to @Ericson2314:matrix.org
well my argument above is microbenchmarks would kinda miss the point
But that change would affect store derivation instantiations, right? Or is that not the case?
15:54:37
@Ericson2314:matrix.orgJohn Ericsonwhat do you mean by instantiations?16:05:59
@Ericson2314:matrix.orgJohn Ericsoncreating them in the evaluator?16:06:05
29 Jul 2025
@joerg:thalheim.ioMic92 John Ericson: Sergei Zimmerman (xokdvium) https://github.com/NixOS/nix/pull/13569 07:42:09
@joerg:thalheim.ioMic92Microbenchmarks for derivation parsing07:42:58
@Ericson2314:matrix.orgJohn Ericson thanks Mic92! 14:58:04
31 Jul 2025
@sammy:cherrykitten.devSammy (It/Its) left the room.10:11:40
29 Jul 2025
@Ericson2314:matrix.orgJohn Ericsonhttps://github.com/NixOS/nix/issues/13570 issue I am curious about14:58:08
@joerg:thalheim.ioMic92Left a comment.15:17:42
@Ericson2314:matrix.orgJohn Ericsonthanks!15:24:40
@Ericson2314:matrix.orgJohn Ericsondidn't think of that angle15:24:43
@Ericson2314:matrix.orgJohn Ericson Mic92: any idea where we would get a nice meaty real-world structured attrs derivation? 20:17:00
@Ericson2314:matrix.orgJohn EricsonI'll need that to test my PR20:17:26
@Ericson2314:matrix.orgJohn Ericsonnevermind20:35:30
@Ericson2314:matrix.orgJohn Ericson firefox.overrideAttrs (_: { __structuredAttrs = true; }) that works 20:35:44
@Ericson2314:matrix.orgJohn Ericsonoh nevermind i grepped wrong, it was already structured attrs!20:38:06
@Ericson2314:matrix.orgJohn Ericson Mic92 Sergei Zimmerman (xokdvium) OK yeah firefox parses 4 times slower 20:39:21
@xokdvium:matrix.orgSergei Zimmerman (xokdvium)
In reply to @Ericson2314:matrix.org
Mic92 Sergei Zimmerman (xokdvium) OK yeah firefox parses 4 times slower
So doing the lazy thing is worth it certainly.
20:40:10
@Ericson2314:matrix.orgJohn EricsonOK!20:40:17

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