Author: Mihnea Saracin <mihnea.sara...@rinftech.com>
Branch: pypy_bytearray
Changeset: r91922:b43a6e2c0ea1
Date: 2017-07-19 13:25 +0300
http://bitbucket.org/pypy/pypy/changeset/b43a6e2c0ea1/
Log: bytearray performance fix(ported from PyPy3)
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
@@ -567,24 +567,16 @@
raise
else:
return list(buf.as_str())
+ return _from_byte_sequence(space, w_source)
- # sequence of bytes
- w_iter = space.iter(w_source)
- length_hint = space.length_hint(w_source, 0)
- data = newlist_hint(length_hint)
- extended = 0
- while True:
- try:
- w_item = space.next(w_iter)
- except OperationError as e:
- if not e.match(space, space.w_StopIteration):
- raise
- break
- data.append(space.byte_w(w_item))
- extended += 1
- if extended < length_hint:
- resizelist_hint(data, extended)
- return data
+def _from_byte_sequence(space, w_source):
+ # Split off in a separate function for the JIT's benefit
+ w_result = space.appexec([w_source], """(seq):
+ result = bytearray()
+ for i in seq:
+ result.append(i)
+ return result""")
+ return w_result.getdata()
def _hex_digit_to_int(d):
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