view tests/test-dirstate-race.t @ 20446:d258486604f4

revset: changed limit revset implementation to work with lazy revsets

Performance benchmarking:

$ time hg log -qr "first(branch(default))"
0:9117c6561b0b

real  0m3.130s
user  0m3.025s
sys 0m0.074s

$ time ./hg log -qr "first(branch(default))"
0:9117c6561b0b

real  0m0.300s
user  0m0.198s
sys 0m0.069s

  $ hg init
  $ echo a > a
  $ hg add a
  $ hg commit -m test

Do we ever miss a sub-second change?:

  $ for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20; do
  >     hg co -qC 0
  >     echo b > a
  >     hg st
  > done
  M a
  M a
  M a
  M a
  M a
  M a
  M a
  M a
  M a
  M a
  M a
  M a
  M a
  M a
  M a
  M a
  M a
  M a
  M a
  M a