From: Zac Medico <zmedico@gentoo.org>
Date: Sun, 10 Dec 2006 07:09:46 +0000 (-0000)
Subject: Cache the results of match_from_list() calls.
X-Git-Tag: v2.1.2~334
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=4fa940a3db4ad6b97eab325a071a2f27a4b507fd;p=portage.git

Cache the results of match_from_list() calls.

svn path=/main/trunk/; revision=5250
---

diff --git a/pym/portage_dep.py b/pym/portage_dep.py
index f592d209f..c0f6467e5 100644
--- a/pym/portage_dep.py
+++ b/pym/portage_dep.py
@@ -478,6 +478,8 @@ def best_match_to_list(mypkg, mylist):
 			bestm  = x
 	return bestm
 
+_match_from_list_cache = {}
+
 def match_from_list(mydep, candidate_list):
 	"""
 	Searches list for entries that matches the package.
@@ -490,6 +492,11 @@ def match_from_list(mydep, candidate_list):
 	@return: A list of package atoms that match the given package atom
 	"""
 
+	global _match_from_list_cache
+	mylist = _match_from_list_cache.get((mydep, tuple(candidate_list)), None)
+	if mylist is not None:
+		return mylist[:]
+
 	from portage_util import writemsg
 	if mydep[0] == "!":
 		mydep = mydep[1:]
@@ -585,4 +592,5 @@ def match_from_list(mydep, candidate_list):
 	else:
 		raise KeyError("Unknown operator: %s" % mydep)
 
+	_match_from_list_cache[(mydep, tuple(candidate_list))] = mylist
 	return mylist