3 Commits

Author	SHA1	Message	Date
Josh Bleecher Snyder	051d2f47e5	internal/deephash: re-use MapIter ... name old time/op new time/op delta Hash-8 12.4µs ± 0% 12.4µs ± 0% -0.33% (p=0.002 n=10+9) HashMapAcyclic-8 21.2µs ± 0% 21.3µs ± 0% +0.45% (p=0.000 n=8+8) name old alloc/op new alloc/op delta Hash-8 793B ± 0% 408B ± 0% -48.55% (p=0.000 n=10+10) HashMapAcyclic-8 128B ± 0% 0B -100.00% (p=0.000 n=10+10) name old allocs/op new allocs/op delta Hash-8 9.00 ± 0% 6.00 ± 0% -33.33% (p=0.000 n=10+10) HashMapAcyclic-8 1.00 ± 0% 0.00 -100.00% (p=0.000 n=10+10) Depends on https://github.com/golang/go/issues/46293. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	2021-05-24 14:47:41 -07:00
Josh Bleecher Snyder	c06ec45f09	internal/deephash: document MapIter shims ... These exist so we can use the optimized MapIter APIs while still working with released versions of Go. They're pretty simple, but some docs won't hurt. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	2021-05-24 14:47:41 -07:00
Josh Bleecher Snyder	a2d7a2aeb1	internal/deephash: use MapIter.Set{Key,Value} ... To get the benefit of this optimization requires help from the Go toolchain. The changes are upstream at https://golang.org/cl/320929, and have been pulled into the Tailscale fork at 728ecc58fd. It also requires building with the build tag tailscale_go. name old time/op new time/op delta Hash-8 14.0µs ± 0% 13.6µs ± 0% -2.88% (p=0.008 n=5+5) HashMapAcyclic-8 24.3µs ± 1% 21.2µs ± 1% -12.47% (p=0.008 n=5+5) name old alloc/op new alloc/op delta Hash-8 2.16kB ± 0% 1.58kB ± 0% -27.01% (p=0.008 n=5+5) HashMapAcyclic-8 2.53kB ± 0% 0.15kB ± 0% -93.99% (p=0.008 n=5+5) name old allocs/op new allocs/op delta Hash-8 77.0 ± 0% 49.0 ± 0% -36.36% (p=0.008 n=5+5) HashMapAcyclic-8 202 ± 0% 4 ± 0% -98.02% (p=0.008 n=5+5) Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com> setkey	2021-05-24 13:51:23 -07:00