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Brad Fitzpatrick 64ac64fb66 net/tsaddr: use bart in NewContainsIPFunc, add tests, benchmarks ... NewContainsIPFunc was previously documented as performing poorly if there were many netip.Prefixes to search over. As such, we never it used it in such cases. This updates it to use bart at a certain threshold (over 6 prefixes, currently), at which point the bart lookup overhead pays off. This is currently kinda useless because we're not using it. But now we can and get wins elsewhere. And we can remove the caveat in the docs. goos: darwin goarch: arm64 pkg: tailscale.com/net/tsaddr │ before │ after │ │ sec/op │ sec/op vs base │ NewContainsIPFunc/empty-8 2.215n ± 11% 2.239n ± 1% +1.08% (p=0.022 n=10) NewContainsIPFunc/cidr-list-1-8 17.44n ± 0% 17.59n ± 6% +0.89% (p=0.000 n=10) NewContainsIPFunc/cidr-list-2-8 27.85n ± 0% 28.13n ± 1% +1.01% (p=0.000 n=10) NewContainsIPFunc/cidr-list-3-8 36.05n ± 0% 36.56n ± 13% +1.41% (p=0.000 n=10) NewContainsIPFunc/cidr-list-4-8 43.73n ± 0% 44.38n ± 1% +1.50% (p=0.000 n=10) NewContainsIPFunc/cidr-list-5-8 51.61n ± 2% 51.75n ± 0% ~ (p=0.101 n=10) NewContainsIPFunc/cidr-list-10-8 95.65n ± 0% 68.92n ± 0% -27.94% (p=0.000 n=10) NewContainsIPFunc/one-ip-8 4.466n ± 0% 4.469n ± 1% ~ (p=0.491 n=10) NewContainsIPFunc/two-ip-8 8.002n ± 1% 7.997n ± 4% ~ (p=0.697 n=10) NewContainsIPFunc/three-ip-8 27.98n ± 1% 27.75n ± 0% -0.82% (p=0.012 n=10) geomean 19.60n 19.07n -2.71% Updates #12486 Change-Id: I2e2320cc4384f875f41721374da536bab995c1ce Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>		5 months ago
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art	all: use Go 1.22 range-over-int	7 months ago
connstats	all: use Go 1.22 range-over-int	7 months ago
dns	various: create a catch-all NRPT rule when "Override local DNS" is enabled on Windows	5 months ago
dnscache	net/dnscache: use parent context to perform lookup	5 months ago
dnsfallback	tsd, ipnlocal, etc: add tsd.System.HealthTracker, start some plumbing	7 months ago
flowtrack	all: update copyright and license headers	2 years ago
ktimeout	net/ktimeout: add a package to set TCP user timeout	9 months ago
memnet	net/memnet: export the network name (#9111)	1 year ago
netaddr	all: update copyright and license headers	2 years ago
netcheck	net/netcheck: fix probeProto.String result for IPv6 probes	5 months ago
neterror	net/neterror, wgengine/magicsock: use UDP GSO and GRO on Linux (#7791)	2 years ago
netkernelconf	ipn/{ipnlocal,localapi},net/netkernelconf,client/tailscale,cmd/containerboot: optionally enable UDP GRO forwarding for containers (#12410)	5 months ago
netknob	all: update copyright and license headers	2 years ago
netmon	net/netmon: remove spammy log statements (#11953)	7 months ago
netns	net/{interfaces,netmon}, all: merge net/interfaces package into net/netmon	7 months ago
netstat	net/{netns,netstat}: use new x/sys/cpu.IsBigEndian	2 years ago
netutil	net/netmon, add: add netmon.State type alias of interfaces.State	7 months ago
packet	all: use Go 1.22 range-over-int	7 months ago
ping	net/ping: fix ICMP echo code field to 0	1 year ago
portmapper	all: use math/rand/v2 more	6 months ago
proxymux	all: cleanup unused code, part 1 (#10661)	11 months ago
routetable	net/{interfaces,netmon}, all: merge net/interfaces package into net/netmon	7 months ago
socks5	net/socks5: add password auth support	2 years ago
sockstats	net/{interfaces,netmon}, all: merge net/interfaces package into net/netmon	7 months ago
speedtest	all: update copyright and license headers	2 years ago
stun	derp/xdp,cmd/xdpderper: initial skeleton (#12390)	5 months ago
stunserver	all: use Go 1.22 range-over-int	7 months ago
tcpinfo	all: use Go 1.22 range-over-int	7 months ago
tlsdial	tsd, ipnlocal, etc: add tsd.System.HealthTracker, start some plumbing	7 months ago
tsaddr	net/tsaddr: use bart in NewContainsIPFunc, add tests, benchmarks	5 months ago
tsdial	tsnet,wgengine/netstack: add ListenPacket and tests	6 months ago
tshttpproxy	all: use Go 1.22 range-over-int	7 months ago
tstun	net/tstun: do SNAT after filterPacketOutboundToWireGuard	6 months ago
wsconn	net/wsconn: accept a remote addr string and plumb it through	1 year ago