[PATCH] D27295: Remove existing file in a separate thread asynchronously.

[Rafael Avila de Espindola via llvm-commits]

Rui Ueyama <ruiu at google.com> writes:


> I agree that that's the right way of doing it in the sense that it
> atomically replaces old file with a new result file. There's no chance that
> we removed a file but we didn't create a new result. However, I guess that
> wouldn't solve the issue that I was trying to address with this patch.
> Maybe the last rename takes 0.25 seconds?

With your current patch we do a rename before starting the thread, so
maybe the rename is fast?

But I was really surprised by unlink being slow, so we really have to
measure to be sure.

Cheers,
Rafael