[pypy-commit] pypy default: Have bytearray.__getitem__(slice) go through the ll_arraycopy fast path when possible.

[alex_gaynor]

Author: Alex Gaynor <alex.gaynor at gmail.com>
Branch: 
Changeset: r54007:9a9eb5e9b67e
Date: 2012-03-26 14:41 -0400
http://bitbucket.org/pypy/pypy/changeset/9a9eb5e9b67e/

Log:	Have bytearray.__getitem__(slice) go through the ll_arraycopy fast
	path when possible.

diff --git a/pypy/objspace/std/bytearrayobject.py b/pypy/objspace/std/bytearrayobject.py
--- a/pypy/objspace/std/bytearrayobject.py
+++ b/pypy/objspace/std/bytearrayobject.py
@@ -111,7 +111,10 @@
     length = len(data)
     start, stop, step, slicelength = w_slice.indices4(space, length)
     assert slicelength >= 0
-    newdata = [data[start + i*step] for i in range(slicelength)]
+    if step == 1 and 0 <= start <= stop:
+        newdata = data[start:stop]
+    else:
+        newdata = [data[start + i*step] for i in range(slicelength)]
     return W_BytearrayObject(newdata)
 
 def contains__Bytearray_Int(space, w_bytearray, w_char):