| 21 Jan 2026 |
 Winter | * running into the same silly “writeTextFiles from my system build are taking longer than i expect to build” again, where “longer than i expect” = like a second per drv… 🤨
can reliably ish repro at least… but still very weird
| 02:07:14 |
| Winter | am i going insane, or are NixOS system closures Just Like That | 02:07:25 |
 raitobezarius | In reply to @winter:catgirl.cloud
running into the same silly “writeTextFiles from my system build are taking longer than i expect to build” again, where “longer than i expect” = like a second per drv… 🤨
can reliably ish repro at least… but still very weird
Sandbox setup time grows with respect to the number of derivations that you are building overall | 06:32:46 |
| raitobezarius | As you have more derivations, forking takes more time even if the derivation is trivial to build | 06:33:20 |
| raitobezarius | It's on our radar to fix this | 06:33:28 |
| raitobezarius | Because it's impossible to build 1M of trivial drvs due to that | 06:33:38 |
 Sofie 🏳️⚧️ (she/her) | btw, thank you so much for build-vm! nixos really plays well with Qemu | 08:36:03 |
| raitobezarius | lmk once you have one, i'm interested | 08:54:46 |
| Sofie 🏳️⚧️ (she/her) | 
Download PXL_20260121_115557999.jpg | 11:56:17 |
| Sofie 🏳️⚧️ (she/her) | Booting of the NixOS image straight from the internet | 11:57:44 |
| Sofie 🏳️⚧️ (she/her) | Like, the provided one on the website | 11:57:53 |
 delroth | off-topic? | 12:01:38 |
 K900 | How did you write it? | 12:01:47 |
| Sofie 🏳️⚧️ (she/her) | dd | 12:19:15 |
| Sofie 🏳️⚧️ (she/her) | Can this be because of the stick? | 12:42:02 |
| Sofie 🏳️⚧️ (she/her) | Like, a hardware error | 12:42:08 |
| Sofie 🏳️⚧️ (she/her) | Anyways offtopic | 12:42:16 |
 antifuchs | this is fascinating! is there a writeup of this somewhere / an issue? I'd love to understand that more. | 19:53:06 |
| raitobezarius | The wiki may talk about it around the concept of "zygote" | 21:01:10 |
| raitobezarius | I think looking at docs on Android zygote might be the more efficient way to learn about the problem space | 21:01:46 |
 piegames | In reply to @raitobezarius:matrix.org
The wiki may talk about it around the concept of "zygote" No search results for that keyword | 22:21:21 |
| raitobezarius | https://source.android.com/docs/core/runtime/zygote | 22:41:52 |
| raitobezarius | i figured out another piece of docs to explain the problem than the obscure piece of docs of zygote of Android | 23:51:28 |
| raitobezarius | https://unikraft.org/blog/2025-05-15-multiprocess#posix-and-the-challenges-of-multiprocess | 23:51:29 |
| raitobezarius | another plan we have to solve this is to be able to use vfork | 23:51:40 |
| raitobezarius | (the path is being slowly opened by the recent chains on reworking libexec helpers in https://gerrit.lix.systems/c/lix/+/4994) | 23:51:56 |
| raitobezarius | the important piece is | 23:52:42 |
| raitobezarius |
given that before COW fork() was too slow as the kernel had to copy the parent's context.
| 23:52:44 |
| 22 Jan 2026 |
| antifuchs | Ah, the classic fork-copies-everything issue, eh. Thanks for linking that! | 01:00:45 |
 Rutile (rootile) | https://lix.dev/blog/introducing-lix/
Ohno | 08:29:06 |
