Revert r124059, is only relevant for 1.4.

Not sure what 1.5 is doing differently, I couldn't find the difference
reading the code but both profiling and timing data show that this
isn't an issue under 1.5/trunk, just under 1.4 into which this change
has already been merged.

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@124125 62d5b8a3-27da-0310-9561-8e5933582275

CHANGES.txt

@@ -4,13 +4,6 @@ Change History
 1.6.0 (unreleased)
 ==================
 
-- Avoid sorting the working set and requirements when it won't be
-  logged.  When profiling a simple buildout with 10 parts with
-  identical and large working sets, this resulted in a decrease of run
-  time from 93.411 to 15.068 seconds, about a 6 fold improvement.  To
-  see the benefit be sure to run without any increase in verbosity
-  ("-v" option).  (rossp)
-
 - The buildout init command now accepts distribution requirements and
   paths to set up a custom interpreter part that has the distributions
   or parts in the path. For example::

src/zc/buildout/easy_install.py

@@ -1850,15 +1850,6 @@ class MissingDistribution(zc.buildout.UserError):
         return "Couldn't find a distribution for %r." % str(req)
 
 def _log_requirement(ws, req):
-    if not logger.isEnabledFor(logging.DEBUG):
-        # Sorting the working set and iterating over it's requirements
-        # is expensive, so short cirtuit the work if it won't even be
-        # logged.  When profiling a simple buildout with 10 parts with
-        # identical and large working sets, this resulted in a
-        # decrease of run time from 93.411 to 15.068 seconds, about a
-        # 6 fold improvement.
-        return
-    
     ws = list(ws)
     ws.sort()
     for dist in ws: