view tests/test-mq-caches @ 5451:0a43875677b1

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.

#!/bin/sh

echo '[extensions]' >> $HGRCPATH
echo 'hgext.mq=' >> $HGRCPATH

show_branch_cache()
{
    branches=.hg/branch.cache
    # force cache (re)generation
    hg log -r does-not-exist 2> /dev/null
    hg log -r tip --template 'tip: #rev#\n'
    if [ -f $branches ]; then
	sort $branches
    else
	echo No $branches
    fi
    if [ "$1" = 1 ]; then
	for b in foo bar; do
	    hg log -r $b --template "branch $b: "'#rev#\n'
	done
    fi
}

hg init a
cd a
hg qinit -c

echo '# mq patch on an empty repo'
hg qnew p1
show_branch_cache

echo > pfile
hg add pfile
hg qrefresh -m 'patch 1'
show_branch_cache

echo
echo '# some regular revisions'
hg qpop
echo foo > foo
hg add foo
echo foo > .hg/branch
hg ci -m 'branch foo' -d '1000000 0'

echo bar > bar
hg add bar
echo bar > .hg/branch
hg ci -m 'branch bar' -d '1000000 0'
show_branch_cache

echo
echo '# add some mq patches'
hg qpush
show_branch_cache

hg qnew p2
echo foo > .hg/branch
echo foo2 >> foo
hg qrefresh -m 'patch 2'
show_branch_cache 1

echo
echo '# removing the cache'
rm .hg/branch.cache
show_branch_cache 1

echo
echo '# importing rev 1 (the cache now ends in one of the patches)'
hg qimport -r 1 -n p0
show_branch_cache 1
hg log -r qbase --template 'qbase: #rev#\n'

echo
echo '# detect an invalid cache'
hg qpop -a
hg qpush -a
show_branch_cache