pennae 8168a4cf4a shrink Attr by 8 bytes on 64bit machines ... with position and symbol tables in place we can now shrink Attr by a full pointer with some simple field reordering. since Attr is a very hot struct this has substantial impact on memory use, decreasing GC allocations and heap size by 10-15% each. we also get a ~15% performance improvement due to reduced GC loading. pure parsing has taken a hit over the branch base because positions are now slightly more expensive to create, but overall we get a noticeable improvement. before (on memory-friendliness): Benchmark 1: nix search --no-eval-cache --offline ../nixpkgs hello Time (mean ± σ): 6.960 s ± 0.028 s [User: 5.832 s, System: 0.897 s] Range (min … max): 6.886 s … 7.005 s 20 runs Benchmark 2: nix eval -f ../nixpkgs/pkgs/development/haskell-modules/hackage-packages.nix Time (mean ± σ): 328.1 ms ± 1.7 ms [User: 295.8 ms, System: 32.2 ms] Range (min … max): 324.9 ms … 331.2 ms 20 runs Benchmark 3: nix eval --raw --impure --expr 'with import <nixpkgs/nixos> {}; system' Time (mean ± σ): 2.688 s ± 0.029 s [User: 2.365 s, System: 0.238 s] Range (min … max): 2.642 s … 2.742 s 20 runs after: Benchmark 1: nix search --no-eval-cache --offline ../nixpkgs hello Time (mean ± σ): 6.902 s ± 0.039 s [User: 5.844 s, System: 0.783 s] Range (min … max): 6.820 s … 6.956 s 20 runs Benchmark 2: nix eval -f ../nixpkgs/pkgs/development/haskell-modules/hackage-packages.nix Time (mean ± σ): 330.7 ms ± 2.2 ms [User: 300.6 ms, System: 30.0 ms] Range (min … max): 327.5 ms … 334.5 ms 20 runs Benchmark 3: nix eval --raw --impure --expr 'with import <nixpkgs/nixos> {}; system' Time (mean ± σ): 2.330 s ± 0.027 s [User: 2.040 s, System: 0.234 s] Range (min … max): 2.272 s … 2.383 s 20 runs		2022-04-21 21:56:34 +02:00
..
build-remote	Generalize DerivationType in preparation for impure derivations	2022-03-18 14:59:56 +00:00
libcmd	store Symbols in a table as well, like positions	2022-04-21 21:56:31 +02:00
libexpr	shrink Attr by 8 bytes on 64bit machines	2022-04-21 21:56:34 +02:00
libfetchers	Avoid fmt when constructor already does it	2022-04-19 01:44:11 +00:00
libmain	Avoid fmt when constructor already does it	2022-04-19 01:44:11 +00:00
libstore	Merge pull request #6431 from NixOS/unbreak-my-build	2022-04-21 10:41:07 +02:00
libutil	store Symbols in a table as well, like positions	2022-04-21 21:56:31 +02:00
nix	store Symbols in a table as well, like positions	2022-04-21 21:56:31 +02:00
nix-build	Desugar StorePathWithOutputs in nix-build implementation	2022-03-11 20:50:52 +00:00
nix-channel	Fix segfault in headerCallback()	2022-03-03 11:11:16 +01:00
nix-collect-garbage	Deduplicate the Store downcasting with a template	2022-03-11 13:32:33 +00:00
nix-copy-closure	copyPaths: Pass store by reference	2021-07-22 09:59:51 +02:00
nix-env	store Symbols in a table as well, like positions	2022-04-21 21:56:31 +02:00
nix-instantiate	store Symbols in a table as well, like positions	2022-04-21 21:56:31 +02:00
nix-store	Deduplicate the Store downcasting with a template	2022-03-11 13:32:33 +00:00
resolve-system-dependencies	Fix macOS build	2022-02-21 17:14:22 +01:00
toml11	Replace cpptoml with toml11	2021-12-17 22:03:33 +01:00