# HG changeset patch
# User Bryan O'Sullivan <bryano@fb.com>
# Date 1340391641 25200
# Node ID 419966126a059508ab64aafae739d6ea7e2fb639
# Parent  ab4644c3064fd12738b18d6f65c6acd5799d57b3
scmutil: speed up new-style range extension

This improves perfrevset performance by 10% for 2222::33333 on a
kernel repo.

diff -r ab4644c3064f -r 419966126a05 mercurial/scmutil.py
--- a/mercurial/scmutil.py	Tue Jun 26 14:32:20 2012 +0200
+++ b/mercurial/scmutil.py	Fri Jun 22 12:00:41 2012 -0700
@@ -584,10 +584,9 @@
 
         # fall through to new-style queries if old-style fails
         m = revset.match(repo.ui, spec)
-        for r in m(repo, range(len(repo))):
-            if r not in seen:
-                l.append(r)
-        seen.update(l)
+        dl = [r for r in m(repo, xrange(len(repo))) if r not in seen]
+        l.extend(dl)
+        seen.update(dl)
 
     return l