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3 Commits (21358cf2f5a7b35ec59f87c68e2537e8ad4ad8fb)

Author SHA1 Message Date
Josh Bleecher Snyder 60abeb027b cmd/derper: stop setting content header in handleBootstrapDNS 
No one really cares. Its cost outweighs its usefulness.

name                   old time/op    new time/op    delta
HandleBootstrapDNS-10     105ns ± 4%      65ns ± 2%   -37.68%  (p=0.000 n=15+14)

name                   old alloc/op   new alloc/op   delta
HandleBootstrapDNS-10      416B ± 0%        0B       -100.00%  (p=0.000 n=15+15)

name                   old allocs/op  new allocs/op  delta
HandleBootstrapDNS-10      3.00 ± 0%      0.00       -100.00%  (p=0.000 n=15+15)

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2 years ago
Josh Bleecher Snyder b9c92b90db cmd/derper: optimize handleBootstrapDNS 
Do json formatting once, rather than on every request.

Use an atomic.Value.

name                   old time/op    new time/op    delta
HandleBootstrapDNS-10    6.35µs ± 0%    0.10µs ± 4%  -98.35%  (p=0.000 n=14+15)

name                   old alloc/op   new alloc/op   delta
HandleBootstrapDNS-10    3.20kB ± 0%    0.42kB ± 0%  -86.99%  (p=0.000 n=12+15)

name                   old allocs/op  new allocs/op  delta
HandleBootstrapDNS-10      41.0 ± 0%       3.0 ± 0%  -92.68%  (p=0.000 n=15+15)

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2 years ago
Brad Fitzpatrick f68431fc02 cmd/derper: add /bootstrap-dns handler 
For option (d) of #1405.

For an HTTPS request of /bootstrap-dns, this returns e.g.:

{
  "log.tailscale.io": [
    "2600:1f14:436:d603:342:4c0d:2df9:191b",
    "34.210.105.16"
  ],
  "login.tailscale.com": [
    "2a05:d014:386:203:f8b4:1d5a:f163:e187",
    "3.121.18.47"
  ]
}

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 3 years ago