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
# Test issue 529 - mq aborts when merging patch deleting files
rewrite_path()
{
sed -e 's:\\:/:g' -e 's:[^ ]*/t/::g'
}
echo "[extensions]" >> $HGRCPATH
echo "hgext.mq=" >> $HGRCPATH
# Commit two dummy files in "init" changeset
hg init t
cd t
echo a > a
echo b > b
hg ci -Am init
hg tag -l init
# Create a patch removing a
hg qnew rm_a
hg rm a
hg qrefresh -m "rm a"
# Save the patch queue so we can merge it later
hg qsave -c -e 2>&1 | rewrite_path
# Update b and commit in an "update" changeset
hg up -C init
echo b >> b
hg st
hg ci -m update
# Here, qpush used to abort with :
# The system cannot find the file specified => a
hg manifest
hg qpush -a -m 2>&1 | rewrite_path
hg manifest
# ensure status is correct after merge
hg qpop -a