[pypy-commit] pypy default: don't make every strategy intstance have a sizehint field, which needs to be

[cfbolz]

Author: Carl Friedrich Bolz <cfb...@gmx.de>
Branch: 
Changeset: r65833:33309a9fd9d0
Date: 2013-07-30 20:55 +0200
http://bitbucket.org/pypy/pypy/changeset/33309a9fd9d0/

Log:    don't make every strategy intstance have a sizehint field, which
        needs to be checked whether it's -1. This saves one guard per normal
        list creation.

diff --git a/pypy/objspace/std/listobject.py b/pypy/objspace/std/listobject.py
--- a/pypy/objspace/std/listobject.py
+++ b/pypy/objspace/std/listobject.py
@@ -702,11 +702,13 @@
 find_jmp = jit.JitDriver(greens = [], reds = 'auto', name = 'list.find')
 
 class ListStrategy(object):
-    sizehint = -1
 
     def __init__(self, space):
         self.space = space
 
+    def get_sizehint(self):
+        return -1
+
     def init_from_list_w(self, w_list, list_w):
         raise NotImplementedError
 
@@ -894,7 +896,7 @@
         else:
             strategy = self.space.fromcache(ObjectListStrategy)
 
-        storage = strategy.get_empty_storage(self.sizehint)
+        storage = strategy.get_empty_storage(self.get_sizehint())
         w_list.strategy = strategy
         w_list.lstorage = storage
 
@@ -974,6 +976,9 @@
         self.sizehint = sizehint
         ListStrategy.__init__(self, space)
 
+    def get_sizehint(self):
+        return self.sizehint
+
     def _resize_hint(self, w_list, hint):
         assert hint >= 0
         self.sizehint = hint
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