TextIO improvement:
- 25% speed increse in tell();
- f.seek(0, 1) now maps to f.seek(f.tell(), 0) instead of to f.tell().
diff --git a/Lib/io.py b/Lib/io.py
index 21f72c8..ccdb3fb 100644
--- a/Lib/io.py
+++ b/Lib/io.py
@@ -992,8 +992,9 @@
return self._encode_decoder_state(decoder_state, position)
decoder = pickle.loads(decoder_state)
n = 0
- for i, b in enumerate(readahead):
- n += len(decoder.decode(bytes([b])))
+ bb = bytes(1)
+ for i, bb[0] in enumerate(readahead):
+ n += len(decoder.decode(bb))
if n >= needed:
decoder_state = pickle.dumps(decoder, 2)
return self._encode_decoder_state(decoder_state, position+i+1)
@@ -1005,7 +1006,8 @@
if whence == 1:
if pos != 0:
raise IOError("Can't do nonzero cur-relative seeks")
- return self.tell()
+ pos = self.tell()
+ whence = 0
if whence == 2:
if pos != 0:
raise IOError("Can't do nonzero end-relative seeks")