Commit Graph

3 Commits

Author SHA1 Message Date
Josh Bleecher Snyder
bbb79f2d6a internal/deephash: fix accidental naked return
name              old time/op    new time/op    delta
Hash-8              23.0µs ± 1%    22.4µs ± 0%   -2.43%  (p=0.008 n=5+5)
HashMapAcyclic-8    24.0µs ± 0%    23.8µs ± 0%   -0.56%  (p=0.008 n=5+5)

name              old alloc/op   new alloc/op   delta
Hash-8              2.92kB ± 0%    2.49kB ± 0%  -14.80%  (p=0.000 n=5+4)
HashMapAcyclic-8    2.53kB ± 0%    2.53kB ± 0%     ~     (all equal)

name              old allocs/op  new allocs/op  delta
Hash-8                93.0 ± 0%      86.0 ± 0%   -7.53%  (p=0.008 n=5+5)
HashMapAcyclic-8       202 ± 0%       202 ± 0%     ~     (all equal)

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
2021-05-24 13:51:23 -07:00
Brad Fitzpatrick
79b7fa9ac3 internal/deephash: hash maps without sorting in the acyclic common case
Hash and xor each entry instead, then write final xor'ed result.

name    old time/op    new time/op    delta
Hash-4    33.6µs ± 4%    34.6µs ± 3%  +3.03%  (p=0.013 n=10+9)

name    old alloc/op   new alloc/op   delta
Hash-4    1.86kB ± 0%    1.77kB ± 0%  -5.10%  (p=0.000 n=10+9)

name    old allocs/op  new allocs/op  delta
Hash-4      51.0 ± 0%      49.0 ± 0%  -3.92%  (p=0.000 n=10+10)

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2021-05-24 13:51:23 -07:00
Brad Fitzpatrick
36a26e6a71 internal/deephash: rename from deepprint
Yes, it printed, but that was an implementation detail for hashing.

And coming optimization will make it print even less.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2021-05-11 12:11:16 -07:00