Author: Ronan Lamy <ronan.l...@gmail.com>
Branch: py3.5
Changeset: r91882:6159e89116af
Date: 2017-07-15 19:05 +0200
http://bitbucket.org/pypy/pypy/changeset/6159e89116af/
Log: (ronan, vaclav) Improve performance of bytearray.extend() by
rewriting some of it at app-level
diff --git a/pypy/objspace/std/bytesobject.py b/pypy/objspace/std/bytesobject.py
--- a/pypy/objspace/std/bytesobject.py
+++ b/pypy/objspace/std/bytesobject.py
@@ -750,20 +750,12 @@
"cannot convert a (unicode) str object to bytes")
# sequence of bytes
- w_iter = space.iter(w_source)
- length_hint = space.length_hint(w_source, 0)
- builder = StringBuilder(length_hint)
- while True:
- try:
- w_item = space.next(w_iter)
- except OperationError as e:
- if not e.match(space, space.w_StopIteration):
- raise
- break
- value = space.byte_w(w_item)
- builder.append(value)
- return builder.build()
-
+ w_result = space.appexec([w_source], """(seq):
+ result = bytearray()
+ for i in seq:
+ result.append(i)
+ return result""")
+ return w_result.getdata()
W_BytesObject.typedef = TypeDef(
"bytes", None, None, "read",
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