# HG changeset patch
# User Siddharth Agarwal <sid0@fb.com>
# Date 1405223040 25200
# Node ID abae1eb695c077fa21b6ef0b7056f36d63cf0302
# Parent  0feb41534421c40c23c71f89f292951b47c4fd98
log: allow revset for --follow to be lazily evaluated

It is unclear to me why evaluation was forced.

For a repository with over 700,000 commits, 'hg log -f' drops from 1.2 seconds
to 0.2 seconds.

diff -r 0feb41534421 -r abae1eb695c0 mercurial/cmdutil.py
--- a/mercurial/cmdutil.py	Mon Jul 14 15:42:31 2014 -0700
+++ b/mercurial/cmdutil.py	Sat Jul 12 20:44:00 2014 -0700
@@ -1719,7 +1719,7 @@
     if opts.get('rev'):
         revs = scmutil.revrange(repo, opts['rev'])
     elif follow:
-        revs = revset.baseset(repo.revs('reverse(:.)'))
+        revs = repo.revs('reverse(:.)')
     else:
         revs = revset.spanset(repo)
         revs.reverse()