aa9d7f4665
tstime: add Parse3339B, for byte slices
...
Use go4.org/mem for memory safety.
A slight performance hit, but a huge performance win
for clients who start with a []byte.
The perf hit is due largely to the MapHash call, which adds ~25ns.
That is necessary to keep the fast path allocation-free.
name old time/op new time/op delta
GoParse3339/Z-8 281ns ± 1% 283ns ± 2% ~ (p=0.366 n=9+9)
GoParse3339/TZ-8 509ns ± 0% 510ns ± 1% ~ (p=0.059 n=9+9)
GoParse3339InLocation-8 330ns ± 1% 330ns ± 0% ~ (p=0.802 n=10+6)
Parse3339/Z-8 69.3ns ± 1% 74.4ns ± 1% +7.45% (p=0.000 n=9+10)
Parse3339/TZ-8 110ns ± 1% 140ns ± 3% +27.42% (p=0.000 n=9+10)
ParseInt-8 8.20ns ± 1% 8.17ns ± 1% ~ (p=0.452 n=9+9)
name old alloc/op new alloc/op delta
GoParse3339/Z-8 0.00B 0.00B ~ (all equal)
GoParse3339/TZ-8 160B ± 0% 160B ± 0% ~ (all equal)
GoParse3339InLocation-8 0.00B 0.00B ~ (all equal)
Parse3339/Z-8 0.00B 0.00B ~ (all equal)
Parse3339/TZ-8 0.00B 0.00B ~ (all equal)
name old allocs/op new allocs/op delta
GoParse3339/Z-8 0.00 0.00 ~ (all equal)
GoParse3339/TZ-8 3.00 ± 0% 3.00 ± 0% ~ (all equal)
GoParse3339InLocation-8 0.00 0.00 ~ (all equal)
Parse3339/Z-8 0.00 0.00 ~ (all equal)
Parse3339/TZ-8 0.00 0.00 ~ (all equal)
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
2020-11-19 14:47:11 -08:00
Josh Bleecher Snyder
David Anderson