[New-bugs-announce] [issue17897] Optimize unpickle prefetching

[Serhiy Storchaka]

New submission from Serhiy Storchaka:

When C implementation of the unpickle reads a data, it also prefetches some data using peek() (if available) and then concatenates read and peeked chunks in the one input buffer. This causes an additional copying when a large data is read. The proposed patch gets rid of concatenating by moving a peeking before reading.

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components: Extension Modules
files: pickle_peek.patch
keywords: patch
messages: 188317
nosy: alexandre.vassalotti, pitrou, serhiy.storchaka
priority: normal
severity: normal
stage: patch review
status: open
title: Optimize unpickle prefetching
type: performance
versions: Python 3.4
Added file: http://bugs.python.org/file30114/pickle_peek.patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17897>
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