# HG changeset patch
# User Mads Kiilerich <madski@unity3d.com>
# Date 1476726516 -7200
# Node ID b4074417b66114a8786bfa49699859ab79918d79
# Parent  1894c830ee7433740c4d802f10c5f3f884b41103
revset: optimize for destination() being "inefficient"

destination() will scan through the whole subset and read extras for each
revision to get its source.

diff -r 1894c830ee74 -r b4074417b661 mercurial/revset.py
--- a/mercurial/revset.py	Tue Oct 11 04:39:47 2016 +0200
+++ b/mercurial/revset.py	Mon Oct 17 19:48:36 2016 +0200
@@ -2595,7 +2595,7 @@
         f = getsymbol(x[1])
         wa, ta = _optimize(x[2], small)
         if f in ('author', 'branch', 'closed', 'date', 'desc', 'file', 'grep',
-                 'keyword', 'outgoing', 'user'):
+                 'keyword', 'outgoing', 'user', 'destination'):
             w = 10 # slow
         elif f in ('modifies', 'adds', 'removes'):
             w = 30 # slower