dirstate: call the C implementation of nonnonormalentries when available
Before this patch, we were using python code for computing the nonnormal
dirstate entries. This patch makes us use the C implementation of the function
when it is available.
Using the nonnormal set in hgwatchman improves hg status performance. Below
are the numbers for mozilla-central.
with the changes:
$ hg perfstatus
! wall 0.010632 comb 0.000000 user 0.000000 sys 0.000000 (best of 246)
without the changes:
$ hg perfstatus
! wall 0.036442 comb 0.030000 user 0.030000 sys 0.000000 (best of 100)
On mozilla-central the improvement to hg status is ~20% (0.25s to 0.2s),
on our big repos at Facebook, the win is ~40% (1.2s to 0.72s).
--- a/mercurial/dirstate.py Mon Dec 21 16:27:16 2015 -0800
+++ b/mercurial/dirstate.py Wed Dec 23 13:16:03 2015 -0800
@@ -51,8 +51,11 @@
def nonnormalentries(dmap):
'''Compute the nonnormal dirstate entries from the dmap'''
- return set(fname for fname, e in dmap.iteritems()
- if e[0] != 'n' or e[3] == -1)
+ try:
+ return parsers.nonnormalentries(dmap)
+ except AttributeError:
+ return set(fname for fname, e in dmap.iteritems()
+ if e[0] != 'n' or e[3] == -1)
def _trypending(root, vfs, filename):
'''Open file to be read according to HG_PENDING environment variable