perf: avoid unnecessary byteslice->string before fmt %s verb #10364
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@@ Coverage Diff @@
## master #10364 +/- ##
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- Coverage 64.27% 64.24% -0.04%
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Files 572 572
Lines 54158 54158
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- Hits 34811 34793 -18
- Misses 17366 17385 +19
+ Partials 1981 1980 -1
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fmt.Printf or fmt.Sprintf already know how to convert a byteslice into a string when building the output; we shouldn't incur the unnecessary string(byteslice) conversion. Using Bencher, we can see improvements such as https://dashboard.github.orijtech.com/benchmark/3245b8e4bbbd44a597480319aaa4b9fe which in independent experiments show: * time/op (ns/op) FormatIt-8 1.2µs ± 2% 1.1µs ± 10% -11.77% (p=0.000 n=10+9) * speed (MB/s) FormatIt-8 0.71GB/s ± 2% 0.80GB/s ± 9% +13.59% (p=0.000 n=10+9) * allocs/op (B/op) FormatIt-8 2.0kB ± 0% 1.1kB ± 0% -45.62% (p=0.000 n=10+10) * allocs/op (count/op) FormatIt-8 11 ± 0% 9.0 ± 0% -18.18% (p=0.000 n=10+10) Fixes #10363
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Oct 14, 2021
This was referenced Oct 13, 2024
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fmt.Printf or fmt.Sprintf already know how to convert a
byteslice into a string when building the output; we shouldn't
incur the unnecessary string(byteslice) conversion.
Using Bencher, we can see improvements such as
https://dashboard.github.orijtech.com/benchmark/3245b8e4bbbd44a597480319aaa4b9fe
which in independent experiments show:
time/op (ns/op)
FormatIt-8 1.2µs ± 2% 1.1µs ± 10% -11.77% (p=0.000 n=10+9)
speed (MB/s)
FormatIt-8 0.71GB/s ± 2% 0.80GB/s ± 9% +13.59% (p=0.000 n=10+9)
allocs/op (B/op)
FormatIt-8 2.0kB ± 0% 1.1kB ± 0% -45.62% (p=0.000 n=10+10)
allocs/op (count/op)
FormatIt-8 11 ± 0% 9.0 ± 0% -18.18% (p=0.000 n=10+10)
Fixes #10363