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| author | Robert Hensing <robert@roberthensing.nl> | 2025-07-07 20:36:26 +0200 |
|---|---|---|
| committer | Robert Hensing <robert@roberthensing.nl> | 2025-07-07 21:02:23 +0200 |
| commit | b78a8c9109b481e559c7b350695e671b3fbc37db (patch) | |
| tree | cc845c39064ef309e2fc027adaa71a0d5a31bc87 /flake.nix | |
| parent | pkgs/impure-overlays.nix: Factor out from impure.nix (diff) | |
| download | nixpkgs-b78a8c9109b481e559c7b350695e671b3fbc37db.tar.gz | |
flake.nix: Construct legacyPackages in one go
This saves the construction of an unused `pkgs` attrset and all that
is required to reach that, which is not a lot, but still significant.
Benchmark 1: nix eval .?ref=42608bc8e65c5bf596d6155ad2f0ded6253b1e69#hello.outPath --no-eval-cache
Time (mean ± σ): 1.062 s ± 0.011 s [User: 0.674 s, System: 0.226 s]
Range (min … max): 1.040 s … 1.080 s 10 runs
Benchmark 2: nix eval .?ref=8a7e18b270cb2256a0526b9cda1d9e410aacd440#hello.outPath --no-eval-cache
Time (mean ± σ): 1.317 s ± 0.033 s [User: 0.835 s, System: 0.270 s]
Range (min … max): 1.282 s … 1.371 s 10 runs
Summary
nix eval .?ref=42608bc8e65c5bf596d6155ad2f0ded6253b1e69#hello.outPath --no-eval-cache ran
1.24 ± 0.03 times faster than nix eval .?ref=8a7e18b270cb2256a0526b9cda1d9e410aacd440#hello.outPath --no-eval-cache
(where 42608bc had the same tree as this commit)
Diffstat (limited to 'flake.nix')
| -rw-r--r-- | flake.nix | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/flake.nix b/flake.nix index 3bd0a48a5cce..3d01030806fb 100644 --- a/flake.nix +++ b/flake.nix @@ -209,11 +209,14 @@ */ legacyPackages = forAllSystems ( system: - (import ./. { inherit system; }).extend ( - final: prev: { - lib = prev.lib.extend libVersionInfoOverlay; - } - ) + (import ./. { + inherit system; + overlays = import ./pkgs/top-level/impure-overlays.nix ++ [ + (final: prev: { + lib = prev.lib.extend libVersionInfoOverlay; + }) + ]; + }) ); /** |