On Mon, May 04, 2015 at 04:42:22PM +0300, Denis V. Lunev wrote: > The difference is quite reliable and the same 5%. > qemu-io -n -c 'write -P 0xaa 0 1G' 1.img > for image in qcow2 format is 1% faster.
I looked a little at the qemu-io invocation but am not clear why there would be a measurable performance difference. Can you explain? What about real qemu-img or QEMU use cases? I'm okay with the patches themselves, but I don't really understand why this code change is justified. Stefan
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