Runewidth speedup by markus-oberhumer · Pull Request #47 · mattn/go-runewidth (original) (raw)

This results in a 6x speedup for the common case RuneWidth768.

name old time/op new time/op delta RuneWidth768-4 21.5µs ± 0% 2.7µs ± 0% -87.27% (p=0.029 n=4+4) RuneWidthAll-4 51.1ms ± 0% 45.3ms ± 0% -11.38% (p=0.029 n=4+4) String1Width768-4 219µs ± 2% 198µs ± 2% -9.73% (p=0.029 n=4+4) RuneWidth768EastAsian-4 35.6µs ± 0% 34.2µs ± 0% -3.86% (p=0.029 n=4+4) RuneWidthAllEastAsian-4 71.5ms ± 0% 69.1ms ± 0% -3.26% (p=0.029 n=4+4) String1WidthAll-4 356ms ± 1% 353ms ± 2% ~ (p=0.343 n=4+4) String1WidthAllEastAsian-4 378ms ± 1% 378ms ± 2% ~ (p=0.886 n=4+4) String1Width768EastAsian-4 236µs ± 1% 235µs ± 2% ~ (p=0.886 n=4+4) [Geo mean] 3.44ms 2.56ms -25.63%