# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@fb.com>
# Date 2014-04-25 21:51:24
# Node ID 6e38b5d4997788ee7accf4ab9cd1c8f8d504db7d
# Parent  1e6d2b6b37ead11aebfcf6104dc303522cb58aac

revset: reduce dict lookup in lazyset.__contains__

Avoid an extra dict lookup when we have to compute the value. No
visible performance impact but this shaves the yak a few extra
nanometers.

diff --git a/mercurial/revset.py b/mercurial/revset.py
--- a/mercurial/revset.py
+++ b/mercurial/revset.py
@@ -2342,7 +2342,8 @@ class lazyset(object):
     def __contains__(self, x):
         c = self._cache
         if x not in c:
-            c[x] = x in self._subset and self._condition(x)
+            v = c[x] = x in self._subset and self._condition(x)
+            return v
         return c[x]
 
     def __iter__(self):