Re: [RFC PATCH] merge-recursive: create new files with O_EXCL

> As a side-note, the strace on the affected file also shows that git
> writes that file twice during the merge, with the same content. There
> might be some potential to further optimize merges to avoid such
> double-writes. A small example to reproduce, note how "b" is opened
> twice during the merge:
>
>   git init
>   echo "foo" > a
>   git add a
>   git commit -m "Initial commit"
>
>   git mv a b
>   git commit -m "File moved"
>
>   git checkout -b other_branch HEAD~
>   touch c && git add c && git commit -m "Some other commit"
>   strace -otrace git merge master -m "merge message"
>   grep '"b"' trace