phases: really fix native phase computation For some reason (probably rebase issue, leprechaun or badly resolved .rej) 1635579f9baf contains only half of the emailed patches and do not fix the bug. This patch adds the other half and enable the sweet native computation for real. As expected this provide massive speedup along the board. revset #0: not public() plain first 0) 0.011960 0.010523 1) 0.000465 3% 0.000492 4% revset #1: (tip~1000::) - public() plain first 0) 0.025700 0.025169 1) 0.002864 11% 0.001899 7% revset #2: not public() and branch("default") plain first 0) 0.022842 0.020863 1) 0.011418 49% 0.010948 52% However, it has a less impact (even bad) on first result time in simple situation. This comes from the overhead of building the set and filtering it. This is especially true on my Mercurial repository (used here) where about 1/3 of the changesets are non public and hidden. This could be mitigated by a caching of the set and a better usage of smartset in '_notpublic'. (But this won't happen in this patch because the win is massive everywhere else). revset #0: not public() last 0) 0.000081 1) 0.000493 x6.1 <-- bad impact revset #1: (tip~1000::) - public() last 0) 0.013966 1) 0.002737 19% revset #2: not public() and branch("default") last 0) 0.011021 1) 0.011038 The effect mostly disappear when the number of non-public changesets is small and/or the repo get bigger. Result for Mozilla central: Mozilla revset #0: not public() plain first last 0) 0.092787 0.084094 0.000080 1) 0.000054 0% 0.000083 0% 0.000083 revset #1: (tip~1000::) - public() plain first last 0) 0.215607 0.183996 0.124962 1) 0.031620 14% 0.006616 3% 0.031168 24% revset #2: not public() and branch("default") plain first last 0) 0.092626 0.082687 0.000162 1) 0.000139 0% 0.000165 0% 0.000167

--- a/mercurial/phases.py	Fri Jun 12 18:34:10 2015 +0800
+++ b/mercurial/phases.py	Wed Jun 10 19:26:16 2015 -0700
@@ -178,7 +178,7 @@
         nativeroots = []
         for phase in trackedphases:
             nativeroots.append(map(repo.changelog.rev, self.phaseroots[phase]))
-        return repo.changelog.computephasesmapsets(nativeroots)
+        return repo.changelog.computephases(nativeroots)
 
     def _computephaserevspure(self, repo):
         repo = repo.unfiltered()