| 21 Jan 2026 |
 Austin Horstman | i didn't even consider that... i've had issues with builds seemingly stuck and not pinned it down... maybe i shouldn't let everyone access everyone the same.. | 15:02:16 |
 Ihar Hrachyshka | oh for sure you shouldn't. | 15:02:41 |
 eveeifyeve | Any other prs that are related to these below?
- https://github.com/NixOS/nix/pull/11143 (load limit)
- https://github.com/NixOS/nix/issues/2457 (speedFactor)
- And stuff about parallel eval implementation movement
| 15:05:24 |
 Randy Eckenrode | Once Nix is building stuff, eval is done. | 15:08:07 |
 Alyssa Ross | https://github.com/ninja-build/ninja/commit/a5da6f98c72d161f766f44fd7cacdcabaaa045ab | 15:22:18 |
| Randy Eckenrode | I had no idea it finally got merged. | 15:23:07 |
 WeetHet | How does thin lto compare to full? | 15:23:26 |
| WeetHet | IIRC it wasn’t much worse when I tested rust | 15:23:44 |
| WeetHet | * | 15:23:58 |
| Randy Eckenrode | Thin LTO was still too slow with Swift. | 15:24:19 |
| WeetHet | Damn, I thought ThinLTO was supposed to be near no lto speed | 15:27:47 |
| WeetHet | But I was mainly thinking about firefox | 15:28:18 |
| WeetHet | They have full LTO enabled for some reason | 15:28:49 |
| Randy Eckenrode | I think it makes different trade-offs, which makes it amenable to parallelization. | 15:28:56 |
| Randy Eckenrode | * | 15:29:05 |
| Randy Eckenrode | * | 15:29:10 |
| Randy Eckenrode | But I guess there can be pathological cases. | 15:29:24 |
| Randy Eckenrode | Oh, only client support? The PR for server support is https://github.com/ninja-build/ninja/pull/2634. | 15:54:14 |
| Randy Eckenrode | Also looks like LLVM is getting support, which would benefit thin LTO. | 15:56:54 |
|  Hexo13 joined the room. | 19:18:26 |
|  Artemis Tosini (NixOS) joined the room. | 21:25:11 |
| Ihar Hrachyshka | interesting that another lto build for firefox took just 2h+: https://hydra.nixos.org/build/319482775 and passed. but sometimes it's at 4h in Hydra and then it times out. I guess Hydra sometimes just too busy? | 22:44:31 |
| 22 Jan 2026 |
| Ihar Hrachyshka | hydra timeout bump for mozilla apps on darwin: https://github.com/NixOS/nixpkgs/pull/482486 | 00:53:35 |
 niko ⚡️ | ah so that's the reason why my build was "stuck". Good to know. Is firefox-bin working on darwin, can I use it before hydra pushes firefox? | 01:35:01 |
| Ihar Hrachyshka | it should work. | 01:43:29 |
 Ivy | how can we sign binaries on macos? and applications? | 02:44:41 |
| Ivy | okay how the hell are we meant to get metal working | 11:04:34 |
| Ivy | or is it fundamentally impossible | 11:04:48 |
 K900 | I think it should be in stdenv? | 11:06:22 |
| K900 | Along with the rest of the SDK | 11:06:26 |
