git log --pretty=format:'%h %s' --numstat HEAD...zfs-2.3.99 | perl -lanE 'if (!@r) { @r = (0,$_) } elsif (m/^(\d+)\s+(\d+)/) { $r[0] += $1+$2 } else { print "@r"; $#r = -1 } END { print "@r" if @r }' | sort -rn | head