[neerajsi]

I've been thinking for the past few years about how to get a scenario like 'git clone' of a large repo to go fast. One thought is to memory map the destination files being written by git and then copy/unzip the data there. You'd save a copy versus the staging buffer that you'd currently be passing to write(). However, the overhead of managing the tlb shootdowns would likely be fatal except for the largest output files.