b2d1cd2ad0
This is optimization is only for IPv4. It allocates a result buffer and writes the IPv4 octets as dotted decimal into it before converting it to a string just once, reducing allocations. Benchmark shows performance improvement: name old time/op new time/op delta IPString/IPv4-8 284ns ± 4% 144ns ± 6% -49.35% (p=0.000 n=19+17) IPString/IPv6-8 1.34µs ± 5% 1.14µs ± 5% -14.37% (p=0.000 n=19+20) name old alloc/op new alloc/op delta IPString/IPv4-8 24.0B ± 0% 16.0B ± 0% -33.33% (p=0.000 n=20+20) IPString/IPv6-8 232B ± 0% 224B ± 0% -3.45% (p=0.000 n=20+20) name old allocs/op new allocs/op delta IPString/IPv4-8 3.00 ± 0% 2.00 ± 0% -33.33% (p=0.000 n=20+20) IPString/IPv6-8 12.0 ± 0% 11.0 ± 0% -8.33% (p=0.000 n=20+20) Fixes #24306 Change-Id: I4e2d30d364e78183d55a42907d277744494b6df3 Reviewed-on: https://go-review.googlesource.com/99395 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> |
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