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
# b51a8138292a introduced a regression where we would mention in the
# changelog executable files added by the second parent of a merge.
# Test that that doesn't happen anymore
"$TESTDIR/hghave" execbit || exit 80
hg init repo
cd repo
echo foo > foo
hg ci -qAm 'add foo' -d '0 0'
echo bar > bar
chmod +x bar
hg ci -qAm 'add bar' -d '0 0'
echo '% manifest of p2:'
hg manifest
echo
hg up -qC 0
echo >> foo
hg ci -m 'change foo' -d '0 0'
echo '% manifest of p1:'
hg manifest
hg merge
hg ci -m 'merge' -d '0 0'
echo '% this should not mention bar:'
hg tip -v
hg debugindex .hg/store/data/bar.i