forked from lix-project/lix
bench: add benchmarks to show off string perf improvements
Change-Id: I6d032706e1e8b6fa39502276ac2018cb69de6ce5
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@ -50,6 +50,10 @@ cases=(
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[rebuild]="{BUILD}/bin/nix $flake_args eval --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'"
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[rebuild-lh]="GC_INITIAL_HEAP_SIZE=10g {BUILD}/bin/nix eval $flake_args --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'"
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[parse]="{BUILD}/bin/nix $flake_args eval -f bench/nixpkgs/pkgs/development/haskell-modules/hackage-packages.nix"
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[substr100k]="{BUILD}/bin/nix eval --no-eval-cache -f bench/substring.nix --apply 'f: f.bench 100000'"
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[substr200k]="{BUILD}/bin/nix eval --no-eval-cache -f bench/substring.nix --apply 'f: f.bench 200000'"
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[substr300k]="{BUILD}/bin/nix eval --no-eval-cache -f bench/substring.nix --apply 'f: f.bench 300000'"
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[substr400k]="{BUILD}/bin/nix eval --no-eval-cache -f bench/substring.nix --apply 'f: f.bench 400000'"
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)
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defaultBenches=(
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19
bench/substring.nix
Normal file
19
bench/substring.nix
Normal file
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@ -0,0 +1,19 @@
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# Tests stringLength and substring performance
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with builtins;
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{
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bench =
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baseStrLen:
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let
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# a big string
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baseStr = concatStringsSep "" (genList (_: "x") baseStrLen);
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# a way to force the values
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sum = ns: foldl' (acc: n: acc + n) 0 ns;
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forceOpTimes =
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range: # Int
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op: # Int -> Int
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sum (genList (ix: op ix) range);
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benchOp = ix: stringLength (substring ix 1 baseStr);
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in
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forceOpTimes baseStrLen benchOp;
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}
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