The Question seems to be more about I/O usage and timing - something that can happen with any language. It seems not to hold anything Assembly specific. So it does not contain or generate any knowledge about or related to Assembly - which is what someone looking for that tag would look for.
Just because Assembly is used to generate the example does not make ...
If the question were a generic "I see this problem in someone else's code and am wondering why it is happening" then I think assembly would not belong.
However, this question actually includes assembly language code, so the tag belongs here.