Optimise allocations in ParseAccept #6
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goos: darwin
goarch: arm64
pkg: github.com/munnerz/goautoneg
│ original.txt │ step-2-slices-sort.txt │
│ sec/op │ sec/op vs base │
ParseAccept/#00-10 24.445n ± 0% 6.524n ± 0% -73.31% (p=0.002 n=6)
ParseAccept/application/json-10 90.67n ± 1% 65.66n ± 0% -27.58% (p=0.002 n=6)
ParseAccept/application/json,text/plain-10 152.7n ± 1% 125.3n ± 0% -17.94% (p=0.002 n=6)
ParseAccept/application/json;q=0.9,text/plain-10 214.5n ± 0% 188.1n ± 0% -12.28% (p=0.002 n=6)
ParseAccept/application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5-10 636.6n ± 1% 615.6n ± 1% -3.30% (p=0.002 n=6)
geomean 135.8n 90.93n -33.05%
│ original.txt │ step-2-slices-sort.txt │
│ B/op │ B/op vs base │
ParseAccept/#00-10 24.00 ± 0% 0.00 ± 0% -100.00% (p=0.002 n=6)
ParseAccept/application/json-10 72.00 ± 0% 48.00 ± 0% -33.33% (p=0.002 n=6)
ParseAccept/application/json,text/plain-10 120.00 ± 0% 96.00 ± 0% -20.00% (p=0.002 n=6)
ParseAccept/application/json;q=0.9,text/plain-10 168.0 ± 0% 144.0 ± 0% -14.29% (p=0.002 n=6)
ParseAccept/application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5-10 456.0 ± 0% 432.0 ± 0% -5.26% (p=0.002 n=6)
geomean 109.7 ? ¹ ²
¹ summaries must be >0 to compute geomean
² ratios must be >0 to compute geomean
│ original.txt │ step-2-slices-sort.txt │
│ allocs/op │ allocs/op vs base │
ParseAccept/#00-10 1.000 ± 0% 0.000 ± 0% -100.00% (p=0.002 n=6)
ParseAccept/application/json-10 2.000 ± 0% 1.000 ± 0% -50.00% (p=0.002 n=6)
ParseAccept/application/json,text/plain-10 2.000 ± 0% 1.000 ± 0% -50.00% (p=0.002 n=6)
ParseAccept/application/json;q=0.9,text/plain-10 3.000 ± 0% 2.000 ± 0% -33.33% (p=0.002 n=6)
ParseAccept/application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5-10 5.000 ± 0% 4.000 ± 0% -20.00% (p=0.002 n=6)
geomean 2.268 ? ¹ ²
¹ summaries must be >0 to compute geomean
² ratios must be >0 to compute geomean
According to https://httpwg.org/specs/rfc9110.html#field.accept, parsing parameters has been removed from the spec as it's no longer widely used. Removing parameter parsing means that Accept will only ever allocate once. Compared to the previous commit: goos: darwin goarch: arm64 pkg: github.com/munnerz/goautoneg │ step-2-slices-sort.txt │ step-4-without-params.txt │ │ sec/op │ sec/op vs base │ ParseAccept/#00-10 6.524n ± 0% 6.540n ± 1% ~ (p=0.056 n=6) ParseAccept/application/json-10 65.66n ± 0% 66.41n ± 1% +1.15% (p=0.009 n=6) ParseAccept/application/json,text/plain-10 125.3n ± 0% 123.7n ± 1% -1.28% (p=0.026 n=6) ParseAccept/application/json;q=0.9,text/plain-10 188.1n ± 0% 164.5n ± 1% -12.54% (p=0.002 n=6) ParseAccept/application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5-10 615.6n ± 1% 528.9n ± 0% -14.08% (p=0.002 n=6) geomean 90.93n 85.90n -5.54% │ step-2-slices-sort.txt │ step-4-without-params.txt │ │ B/op │ B/op vs base │ ParseAccept/#00-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=6) ¹ ParseAccept/application/json-10 48.00 ± 0% 48.00 ± 0% ~ (p=1.000 n=6) ¹ ParseAccept/application/json,text/plain-10 96.00 ± 0% 80.00 ± 0% -16.67% (p=0.002 n=6) ParseAccept/application/json;q=0.9,text/plain-10 144.00 ± 0% 80.00 ± 0% -44.44% (p=0.002 n=6) ParseAccept/application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5-10 432.0 ± 0% 240.0 ± 0% -44.44% (p=0.002 n=6) geomean ² -23.78% ² ¹ all samples are equal ² summaries must be >0 to compute geomean │ step-2-slices-sort.txt │ step-4-without-params.txt │ │ allocs/op │ allocs/op vs base │ ParseAccept/#00-10 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=6) ¹ ParseAccept/application/json-10 1.000 ± 0% 1.000 ± 0% ~ (p=1.000 n=6) ¹ ParseAccept/application/json,text/plain-10 1.000 ± 0% 1.000 ± 0% ~ (p=1.000 n=6) ¹ ParseAccept/application/json;q=0.9,text/plain-10 2.000 ± 0% 1.000 ± 0% -50.00% (p=0.002 n=6) ParseAccept/application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5-10 4.000 ± 0% 1.000 ± 0% -75.00% (p=0.002 n=6) geomean ² -34.02% ² ¹ all samples are equal ² summaries must be >0 to compute geomean
Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>
Signed-off-by: Marco Pracucci <marco@pracucci.com>
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@munnerz Any chance of getting this merged? |
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This PR is like #5 but reverting back the change that removed
Params, given it currently breaks https://github.com/prometheus/common.In this PR we propose to use
golang.org/x/exp/slices.SortFuncinstead ofsort.Sort. This requires Go 1.18+ as it uses generics.