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Nix, the purely functional package manager
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This avoids the quite costly copying of derivations to the daemon over the wire in case it already exists in the eval store. For a fresh instantiatation (after running nix-collect-garbage) this doesn't significantly slow down eval: taskset -c 2,3 hyperfine --reference "result-old/bin/nix eval -f ../nixpkgs hello --store unix:///tmp/nix_socket" --prepare "nix-collect-garbage --store /tmp/store1111 --no-keep-derivations" "result/bin/nix eval -f ../nixpkgs hello --store unix:///tmp/nix_socket" Benchmark 1: result-old/bin/nix eval -f ../nixpkgs hello --store unix:///tmp/nix_socket Time (mean ± σ): 388.7 ms ± 10.5 ms [User: 157.0 ms, System: 61.3 ms] Range (min … max): 379.4 ms … 415.9 ms 10 runs Benchmark 2: result/bin/nix eval -f ../nixpkgs hello --store unix:///tmp/nix_socket Time (mean ± σ): 389.2 ms ± 4.8 ms [User: 158.5 ms, System: 60.7 ms] Range (min … max): 381.2 ms … 397.6 ms 10 runs But if the derivations are already instantiated this shows a pretty neat speedup: taskset -c 2,3 hyperfine --reference "result-old/bin/nix eval -f ../nixpkgs hello --store unix:///tmp/nix_socket" "result/bin/nix eval -f ../nixpkgs hello --store unix:///tmp/nix_socket" Benchmark 1: result-old/bin/nix eval -f ../nixpkgs hello --store unix:///tmp/nix_socket Time (mean ± σ): 240.4 ms ± 3.1 ms [User: 148.1 ms, System: 57.0 ms] Range (min … max): 233.8 ms … 245.0 ms 12 runs Benchmark 2: result/bin/nix eval -f ../nixpkgs hello --store unix:///tmp/nix_socket Time (mean ± σ): 226.5 ms ± 4.5 ms [User: 147.8 ms, System: 55.2 ms] Range (min … max): 214.0 ms … 231.2 ms 13 runs Co-authored-by: Sergei Zimmerman <sergei@zimmerman.foo> |
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Nix
Nix is a powerful package manager for Linux and other Unix systems that makes package management reliable and reproducible. Please refer to the Nix manual for more details.
Installation and first steps
Visit nix.dev for installation instructions and beginner tutorials.
Full reference documentation can be found in the Nix manual.
Building and developing
Follow instructions in the Nix reference manual to set up a development environment and build Nix from source.
Contributing
Check the contributing guide if you want to get involved with developing Nix.
Additional resources
Nix was created by Eelco Dolstra and developed as the subject of his PhD thesis The Purely Functional Software Deployment Model, published 2006. Today, a world-wide developer community contributes to Nix and the ecosystem that has grown around it.
- The Nix, Nixpkgs, NixOS Community on nixos.org
- Official documentation on nix.dev
- Nixpkgs is the largest, most up-to-date free software repository in the world
- NixOS is a Linux distribution that can be configured fully declaratively
- Discourse
- Matrix: #users:nixos.org for user support and #nix-dev:nixos.org for development
License
Nix is released under the LGPL v2.1.