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revlog: break up compression of large deltas Python's zlib apparently makes an internal copy of strings passed to compress(). To avoid this, compress strings 1M at a time, then join them at the end if the result would be smaller than the original. For initial commits of large but compressible files, this cuts peak memory usage nearly in half.
author Matt Mackall <mpm@selenic.com>
date Thu, 11 Oct 2007 00:46:54 -0500
parents 71e7c86adcb7
children
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#!/bin/sh

echo "[extensions]" >> $HGRCPATH
echo "convert=" >> $HGRCPATH

hg help convert

hg init a
cd a
echo a > a
hg ci -d'0 0' -Ama
hg cp a b
hg ci -d'1 0' -mb
hg rm a
hg ci -d'2 0' -mc
hg mv b a
hg ci -d'3 0' -md
echo a >> a
hg ci -d'4 0' -me

cd ..
hg convert a 2>&1 | grep -v 'subversion python bindings could not be loaded'
hg --cwd a-hg pull ../a

touch bogusfile
echo % should fail
hg convert a bogusfile

mkdir bogusdir
chmod 000 bogusdir

echo % should fail
hg convert a bogusdir

echo % should succeed
chmod 700 bogusdir
hg convert a bogusdir