Discard "nomerge" nodes to speed up depgraph.altlist() since those nodes aren't used and the --tree algorithm does a good job of regenerating them when appropriate. (trunk r7067)

svn path=/main/branches/2.1.2/; revision=7068

1 files changed, 3 insertions, 0 deletions

diff --git a/bin/emerge b/bin/emerge
index 039e3e3a..4cc10233 100755
--- a/bin/emerge
+++ b/bin/emerge
@@ -2023,6 +2023,9 @@ class depgraph:
 			self._altlist_cache[reversed] = retlist[:]
 			return retlist
 		mygraph=self.digraph.copy()
+		for node in mygraph.order[:]:
+			if node[-1] == "nomerge":
+				mygraph.remove(node)
 		self._merge_order_bias(mygraph)
 		myblockers = self.blocker_digraph.copy()
 		retlist=[]