[pypy-commit] pypy default: Perform fewer dict lookups here

[alex_gaynor]

Author: Alex Gaynor <alex.gaynor at gmail.com>
Branch: 
Changeset: r67135:7066133c5cfc
Date: 2013-09-29 09:57 -0700
http://bitbucket.org/pypy/pypy/changeset/7066133c5cfc/

Log:	Perform fewer dict lookups here

diff --git a/rpython/jit/metainterp/heapcache.py b/rpython/jit/metainterp/heapcache.py
--- a/rpython/jit/metainterp/heapcache.py
+++ b/rpython/jit/metainterp/heapcache.py
@@ -87,9 +87,11 @@
     def _escape(self, box):
         if box in self.new_boxes:
             self.new_boxes[box] = False
-        if box in self.dependencies:
-            deps = self.dependencies[box]
-            del self.dependencies[box]
+        try:
+            deps = self.dependencies.pop(box)
+        except KeyError:
+            pass
+        else:
             for dep in deps:
                 self._escape(dep)