optimize further WriteToSlice with len<32#213
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holiman merged 1 commit intoholiman:masterfrom Feb 28, 2026
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goos: linux
goarch: amd64
pkg: github.com/holiman/uint256
cpu: AMD Ryzen 5 3600 6-Core Processor
│ old.txt │ new.txt │
│ sec/op │ sec/op vs base │
WriteTo/fixed-20-12 0.7865n ± 1% 0.7819n ± 4% ~ (p=0.089 n=10)
WriteTo/fixed-32-12 1.049n ± 0% 1.035n ± 3% ~ (p=0.062 n=10)
WriteTo/slice-12 2.587n ± 2% 2.321n ± 1% -10.26% (p=0.000 n=10)
WriteTo/put256-12 1.038n ± 5% 1.048n ± 0% ~ (p=0.196 n=10)
geomean 1.220n 1.184n -2.91%
│ old.txt │ new.txt │
│ B/op │ B/op vs base │
WriteTo/fixed-20-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
WriteTo/fixed-32-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
WriteTo/slice-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
WriteTo/put256-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
geomean ² +0.00% ²
¹ all samples are equal
² summaries must be >0 to compute geomean
│ old.txt │ new.txt │
│ allocs/op │ allocs/op vs base │
WriteTo/fixed-20-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
WriteTo/fixed-32-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
WriteTo/slice-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
WriteTo/put256-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
geomean ² +0.00% ²
¹ all samples are equal
² summaries must be >0 to compute geomean
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It may or may not make sense, I just did it out of fun after looking at #212