# HG changeset patch
# User Siddharth Agarwal <sid0@fb.com>
# Date 1414920874 28800
# Node ID d07ccad28b1a8f8fdef4144812e1b9af75ac7f6b
# Parent  c54214bb6c4e24d00f02bc7597c85bfecbce40cc
maps.RevMap: avoid O(revs) property lookups on dict

Loading a million-entry revmap goes from 3.72 seconds to 3.65.

diff --git a/hgsubversion/maps.py b/hgsubversion/maps.py
--- a/hgsubversion/maps.py
+++ b/hgsubversion/maps.py
@@ -224,6 +224,7 @@ class RevMap(dict):
     def _load(self):
         lastpulled = self.meta.lastpulled
         firstpulled = self.meta.firstpulled
+        setitem = dict.__setitem__
         for l in self.readmapfile(self.meta.revmap_file):
             revnum, ha, branch = l.split(' ', 2)
             if branch == '\n':
@@ -235,7 +236,7 @@ class RevMap(dict):
                 lastpulled = revnum
             if revnum < firstpulled or not firstpulled:
                 firstpulled = revnum
-            dict.__setitem__(self, (revnum, branch), bin(ha))
+            setitem(self, (revnum, branch), bin(ha))
         self.meta.lastpulled = lastpulled
         self.meta.firstpulled = firstpulled