31c96fc227
Optimize DecodeString for the common case where most of the input isn't a newline or a padding character. Also add some testcases found when fuzzing this implementation against upstream. Change Decode benchmark to run with different input sizes. name old time/op new time/op delta DecodeString/2-4 71.5ns ± 4% 70.0ns ± 6% ~ (p=0.246 n=5+5) DecodeString/4-4 112ns ±25% 91ns ± 2% ~ (p=0.056 n=5+5) DecodeString/8-4 136ns ± 5% 126ns ± 5% -7.33% (p=0.016 n=5+5) DecodeString/64-4 872ns ±29% 652ns ±21% -25.23% (p=0.032 n=5+5) DecodeString/8192-4 90.9µs ±21% 61.0µs ±13% -32.87% (p=0.008 n=5+5) name old speed new speed delta DecodeString/2-4 56.0MB/s ± 4% 57.2MB/s ± 6% ~ (p=0.310 n=5+5) DecodeString/4-4 73.4MB/s ±23% 87.7MB/s ± 2% ~ (p=0.056 n=5+5) DecodeString/8-4 87.8MB/s ± 5% 94.8MB/s ± 5% +7.98% (p=0.016 n=5+5) DecodeString/64-4 103MB/s ±24% 136MB/s ±19% +32.63% (p=0.032 n=5+5) DecodeString/8192-4 122MB/s ±19% 180MB/s ±11% +47.75% (p=0.008 n=5+5) Improves #19636 Change-Id: I39667f4fb682a12b3137946d017ad999553c5780 Reviewed-on: https://go-review.googlesource.com/34950 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> |
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