[New-bugs-announce] [issue9971] Optimize BufferedReader.readinto

Daniel Stutzbach report at bugs.python.org
Tue Sep 28 17:19:02 CEST 2010

New submission from Daniel Stutzbach <daniel at stutzbachenterprises.com>:

The readinto() method is intended to offer better performance than read() by allowing the caller to read into a preallocated buffer rather than constantly allocate and deallocate buffers.

However, bufferediobase_readinto() calls read(), so the extra allocations and deallocations happen anyway.  On a related note, buffered_readinto() has a comment reading "TODO: use raw.readinto() instead!" which should be explored.

I can write a patch for this, but it will probably be awhile before I get to it.  Anyone else who feels inspired should feel free to write one. :-)

assignee: stutzbach
components: IO
messages: 117530
nosy: benjamin.peterson, pitrou, stutzbach
priority: normal
severity: normal
stage: needs patch
status: open
title: Optimize BufferedReader.readinto
type: performance
versions: Python 3.2

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