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On behalf of Nadeem Vawda: issue #10376: micro-optimize reading from a Zipfile. 

(patch by Serhiy)
This commit is contained in:
Antoine Pitrou 2012-06-23 16:44:48 +02:00
parent 3861d8b271
commit 78157b3f6f
1 changed files with 10 additions and 8 deletions
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18
Lib/zipfile.py
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@ -733,12 +733,13 @@ class ZipExtFile(io.BufferedIOBase):
buf += self._read1(self.MAX_N)
return buf
n -= len(self._readbuffer) - self._offset
if n < 0:
buf = self._readbuffer[self._offset:n]
self._offset += len(buf)
end = n + self._offset
if end < len(self._readbuffer):
buf = self._readbuffer[self._offset:end]
self._offset = end
return buf
n = end - len(self._readbuffer)
buf = self._readbuffer[self._offset:]
self._readbuffer = b''
self._offset = 0
@ -774,12 +775,13 @@ class ZipExtFile(io.BufferedIOBase):
buf += data
return buf
n -= len(self._readbuffer) - self._offset
if n < 0:
buf = self._readbuffer[self._offset:n]
self._offset += len(buf)
end = n + self._offset
if end < len(self._readbuffer):
buf = self._readbuffer[self._offset:end]
self._offset = end
return buf
n = end - len(self._readbuffer)
buf = self._readbuffer[self._offset:]
self._readbuffer = b''
self._offset = 0