[New-bugs-announce] [issue8745] zipimport is a bit slow

[Goplat]

New submission from Goplat <mrnobo1024 at yahoo.com>:

Reading the list of files in a .zip takes a while because several seeks are done for each entry, which (on Windows at least) flushes stdio's buffer and forces a system call on the next read. For large .zips the effect on startup speed is noticeable, being perhaps 50ms per thousand files. Changing the read_directory function to read the central directory entirely sequentially would cut this time by more than half.

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components: Interpreter Core
files: zipimport_speedup.patch
keywords: patch
messages: 105954
nosy: Goplat
priority: normal
severity: normal
status: open
title: zipimport is a bit slow
type: performance
versions: Python 2.6
Added file: http://bugs.python.org/file17387/zipimport_speedup.patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue8745>
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