Run per-host/per-package nix eval and dry-run build concurrently #35

Merged

beatzaplenty merged 1 commits from worktree-parallel-host-eval into main

2026-07-22 02:05:59 +00:00

Author	SHA1	Message	Date
beatzaplentyandClaude Sonnet 5	f237a6a3d2	Run per-host/per-package nix eval and dry-run build concurrently Check NixOS configurations / eval-hosts (pull_request) Successful in 10m20s Details codex-maintenance.sh evaluated each affected host/package one at a time, even though those calls are independent. Added scripts/lib/nix-parallel.sh (run_nix_parallel) and wired it into the host-eval, package-eval, and dry-run-build loops. Concurrency defaults to core count capped by available memory (~1GB/job) rather than plain nproc: empirically, nproc-many concurrent full-flake evals OOM-killed each other on a 4GB/6-core box, while 3-4 ran clean and were still ~2x faster than serial. Override via NIX_PARALLEL_JOBS. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>	2026-07-22 02:04:21 +00:00

Author

SHA1

Message

Date

beatzaplentyandClaude Sonnet 5

f237a6a3d2

Run per-host/per-package nix eval and dry-run build concurrently

Check NixOS configurations / eval-hosts (pull_request) Successful in 10m20s

Details

codex-maintenance.sh evaluated each affected host/package one at a time,
even though those calls are independent. Added scripts/lib/nix-parallel.sh
(run_nix_parallel) and wired it into the host-eval, package-eval, and
dry-run-build loops.

Concurrency defaults to core count capped by available memory (~1GB/job)
rather than plain nproc: empirically, nproc-many concurrent full-flake
evals OOM-killed each other on a 4GB/6-core box, while 3-4 ran clean and
were still ~2x faster than serial. Override via NIX_PARALLEL_JOBS.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

2026-07-22 02:04:21 +00:00