Here's a parallel implementation that gets me 950 commits per second: manycommits() { h=@; t=`git rev-parse @^{tree}` for i in `seq 2 "$1"`

Here's a parallel implementation that gets me 950 commits per second: manycommits() { h=@; t=`git rev-parse @^{tree}` for i in `seq 2 "$1"`; do h=`echo "$*" | git commit-tree $t -p $h` done echo $h } twice() { "$@" a & "$@" b ; wait; } twice twice twice twice manycommits 10000 | while read h; do git merge --no-edit $h; done