keyboard-layout yes, the remapping tags are useless. When they refer to mouse buttons, they should be tagged mouse.

The real answer to your question is, buy the best hardware you can afford. If it still isn't fast enough, then it doesn't matter, because you couldn't afford anything better anyway. This answer is especially true because, in case it was too fast, then at least your requirement for future-proofing would also be met.

@CostinGușă: The "number of questions" isn't tied to the number of question marks in your post. If your question can be summarized into a single sentence, then it probably should. That being said, your post doesn't look like a single question. I've now read it multiple times and my best guess is that you want to know how to display a series of images in succession as fast as possible. But this still isn't a good question, because it would be impossible to predict which configuration of hardware+software would reach your set goal of 200ms (without naming specific products).

It scored -2. It was in the review queues twice and was voted as "leave closed".

It was automatically deleted because it was closed and not reopened and had a negative score.

@KyleStrand: You're welcome to post an answer here, making a case for the tag, but my position remains that the tag doesn't provide any value. Background processes are not an area of expertise and/or interest. There aren't any experts on background processes who would see your question and have an answer because they deal with background processes all the time. The important tags here are the product you're dealing with and the operating system you're using.

@KyleStrand: It doesn't provide any value whatsoever. You might be interested in meta.superuser.com/questions/8146/help-us-clean-up-tags

I agree on the merge, but the tags are useless anyway.