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This commits ports a fast C-implementation from https://github.com/namazso/QuickXorHash It uses new crypto/subtle code from go1.20 to avoid the use of unsafe. Typical speedups are about 25x when using go1.20 goos: linux goarch: amd64 cpu: Intel(R) Celeron(R) N5105 @ 2.00GHz QuickXorHash-Before 2.49ms 422MB/s ±11% 100.00% QuickXorHash-Subtle 87.9µs 11932MB/s ± 5% +2730.83% + 42.17% Co-Author: @namazso
21 lines
299 B
Go
21 lines
299 B
Go
//go:build !go1.20
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package quickxorhash
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func xorBytes(dst, src []byte) int {
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n := len(dst)
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if len(src) < n {
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n = len(src)
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}
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if n == 0 {
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return 0
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}
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dst = dst[:n]
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//src = src[:n]
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src = src[:len(dst)] // remove bounds check in loop
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for i := range dst {
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dst[i] ^= src[i]
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}
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return n
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}
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