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52 lines
3.3 KiB
Markdown
52 lines
3.3 KiB
Markdown
# gofastTEA
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TEA 编码算法的 PLAN9 汇编优化实现
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## 1.17 版本及以上
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速度已经达到最优，代码与[MiraiGo](https://github.com/Mrs4s/MiraiGo/blob/574c4e57b1467225f03936342e477ee0d587a2dc/binary/tea.go)完全相同。
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## 1.16 版本及以下
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使用 PLAN9 汇编编写`Encrypt`，内联编写`Decrypt`，与[MiraiGo](https://github.com/Mrs4s/MiraiGo/blob/574c4e57b1467225f03936342e477ee0d587a2dc/binary/tea.go)代码相比，在`1.16`版本下编译提升速度如下（new16.txt）。
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```css
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name old time/op new time/op delta
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TEAen/16-8 252ns ± 0% 240ns ± 1% -4.50% (p=0.000 n=9+10)
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TEAen/256-8 1.77µs ± 1% 1.67µs ± 1% -5.66% (p=0.000 n=9+10)
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TEAen/4K-8 25.9µs ± 0% 24.8µs ± 0% -4.00% (p=0.000 n=10+9)
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TEAen/32K-8 208µs ± 1% 201µs ± 0% -3.34% (p=0.000 n=10+10)
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TEAde/16-8 216ns ± 1% 211ns ± 1% -2.68% (p=0.000 n=10+10)
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TEAde/256-8 1.71µs ± 1% 1.66µs ± 1% -2.69% (p=0.000 n=10+10)
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TEAde/4K-8 25.4µs ± 1% 24.7µs ± 1% -2.73% (p=0.000 n=10+10)
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TEAde/32K-8 206µs ± 0% 200µs ± 0% -2.59% (p=0.000 n=9+10)
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name old speed new speed delta
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TEAen/16-8 63.5MB/s ± 0% 66.5MB/s ± 1% +4.70% (p=0.000 n=9+10)
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TEAen/256-8 145MB/s ± 1% 153MB/s ± 1% +5.98% (p=0.000 n=9+10)
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TEAen/4K-8 158MB/s ± 0% 165MB/s ± 0% +4.16% (p=0.000 n=10+9)
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TEAen/32K-8 158MB/s ± 1% 163MB/s ± 0% +3.45% (p=0.000 n=10+10)
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TEAde/16-8 148MB/s ± 1% 152MB/s ± 1% +2.75% (p=0.000 n=10+10)
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TEAde/256-8 160MB/s ± 1% 164MB/s ± 1% +2.77% (p=0.000 n=10+10)
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TEAde/4K-8 162MB/s ± 1% 167MB/s ± 1% +2.80% (p=0.000 n=10+10)
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TEAde/32K-8 159MB/s ± 0% 164MB/s ± 0% +2.66% (p=0.000 n=9+10)
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```
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另外升级到`go1.17`后，即与[MiraiGo](https://github.com/Mrs4s/MiraiGo/blob/574c4e57b1467225f03936342e477ee0d587a2dc/binary/tea.go)代码相同时，在`1.16`版本下编译提升速度如下（new17.txt）。
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```css
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name old time/op new time/op delta
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TEAen/16-8 252ns ± 0% 241ns ± 1% -4.09% (p=0.000 n=9+10)
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TEAen/256-8 1.77µs ± 1% 1.70µs ± 0% -3.85% (p=0.000 n=9+10)
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TEAen/4K-8 25.9µs ± 0% 24.9µs ± 1% -3.59% (p=0.000 n=10+10)
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TEAen/32K-8 208µs ± 1% 200µs ± 1% -3.78% (p=0.000 n=10+10)
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TEAde/16-8 216ns ± 1% 208ns ± 1% -3.80% (p=0.000 n=10+10)
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TEAde/256-8 1.71µs ± 1% 1.65µs ± 1% -3.44% (p=0.000 n=10+10)
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TEAde/4K-8 25.4µs ± 1% 24.5µs ± 0% -3.40% (p=0.000 n=10+10)
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TEAde/32K-8 206µs ± 0% 199µs ± 0% -3.36% (p=0.000 n=9+10)
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name old speed new speed delta
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TEAen/16-8 63.5MB/s ± 0% 66.3MB/s ± 1% +4.27% (p=0.000 n=9+10)
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TEAen/256-8 145MB/s ± 1% 150MB/s ± 0% +4.01% (p=0.000 n=9+10)
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TEAen/4K-8 158MB/s ± 0% 164MB/s ± 1% +3.73% (p=0.000 n=10+10)
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TEAen/32K-8 158MB/s ± 1% 164MB/s ± 1% +3.93% (p=0.000 n=10+10)
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TEAde/16-8 148MB/s ± 1% 154MB/s ± 1% +3.95% (p=0.000 n=10+10)
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TEAde/256-8 160MB/s ± 1% 165MB/s ± 1% +3.55% (p=0.000 n=10+10)
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TEAde/4K-8 162MB/s ± 1% 168MB/s ± 0% +3.52% (p=0.000 n=10+10)
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TEAde/32K-8 159MB/s ± 0% 165MB/s ± 0% +3.45% (p=0.000 n=9+9)
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```
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可见在编码时，在某些时候`go1.16`版本下速度比`go1.17`版本更快，而整体来看，在优化后`go1.16`版本下的执行效率已经可以与`go1.17`版本持平。 |