# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@fb.com>
# Date 2014-10-08 09:47:00
# Node ID 5ee9b78ce805717679e4ba88b2f1fe412df8ecde
# Parent  6e739356f9bf26cad5125dbd10449a9124781d47

revset-branch: remove usage of `set()`

All smartset classes have fast lookup, so this function will be removed soon.

diff --git a/mercurial/revset.py b/mercurial/revset.py
--- a/mercurial/revset.py
+++ b/mercurial/revset.py
@@ -497,8 +497,8 @@ def branch(repo, subset, x):
     b = set()
     for r in s:
         b.add(repo[r].branch())
-    s = s.set()
-    return subset.filter(lambda r: r in s or repo[r].branch() in b)
+    c = s.__contains__
+    return subset.filter(lambda r: c(r) or repo[r].branch() in b)
 
 def bumped(repo, subset, x):
     """``bumped()``