Mercurial > public > mercurial-scm > hg-stable

diff mercurial/manifest.py @ 29056:e2178f7d17c0

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manifest: improve filesnotin performance by using lazymanifest diff lazymanifests can compute diffs significantly faster than taking the set of two manifests and calculating the delta. when running hg diff --git -c . on Facebook's big repo, this reduces the run time from 2.1s to 1.5s.
author Tony Tung <tonytung@merly.org>
date Mon, 02 May 2016 15:22:16 -0700
parents 1ac8ce137377
children 98e8313dcd9e
line wrap: on
line diff
--- a/mercurial/manifest.py	Tue Apr 19 11:00:15 2016 +0100
+++ b/mercurial/manifest.py	Mon May 02 15:22:16 2016 -0700
@@ -211,8 +211,10 @@
 
     def filesnotin(self, m2):
         '''Set of files in this manifest that are not in the other'''
-        files = set(self)
-        files.difference_update(m2)
+        diff = self.diff(m2)
+        files = set(filepath
+                    for filepath, hashflags in diff.iteritems()
+                    if hashflags[1][0] is None)
         return files
 
     @propertycache