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tailscale/net/netns
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Brad Fitzpatrick a5d6c9d616 net/netns: optimize defaultRouteInterface a bit 
It'll be called a bunch, so worth a bit of effort. Could go further, but not yet.
(really, should hook into wgengine/monitor and only re-read on netlink changes?)

name                     old time/op    new time/op    delta
DefaultRouteInterface-8    60.8µs ±11%    44.6µs ± 5%  -26.65%  (p=0.000 n=20+19)

name                     old alloc/op   new alloc/op   delta
DefaultRouteInterface-8    3.29kB ± 0%    0.55kB ± 0%  -83.21%  (p=0.000 n=20+20)

name                     old allocs/op  new allocs/op  delta
DefaultRouteInterface-8      9.00 ± 0%      6.00 ± 0%  -33.33%  (p=0.000 n=20+20)
2020-05-31 15:37:09 -07:00
..
netns_default.go net/netns: set the bypass socket mark on linux. 2020-05-29 15:16:58 -07:00
netns_linux_test.go net/netns: optimize defaultRouteInterface a bit 2020-05-31 15:37:09 -07:00
netns_linux.go net/netns: optimize defaultRouteInterface a bit 2020-05-31 15:37:09 -07:00
netns.go net/netns, misc tests: remove TestOnlySkipPrivilegedOps, argv checks 2020-05-31 14:40:18 -07:00