Does keyboard scan rate theoretically matter for frame precise gameplay?

[scenic moth]

We just had a discussion in #celeste where multiple users tested the shortest keypress their keyboards can register. For some it was as low as 1ms, for some it were 7-17ms. And we wonder whether it matters for frame precise gameplay. Would you say having a better scan rate helps with precision gameplay or does it not matter as long as its under 1 frame?

[summer gyro]

Replying to keep this from getting archived, I'm in the process of writing a detailed response to this, but the reply got so long that I had to move it to a google doc

You must first reach my basic level of understanding of certain concepts in order to understand the answer

[scenic moth]

Oh thats rad! Can't wait to read the response

Also archive timer seems to be 1 week

[summer gyro]

still working hard on it

[summer gyro]

ah I see lmao

[summer gyro]

Keyboard Scan Rate's and Input Latency's Influence on Precision Game Performance: https://docs.google.com/document/d/10zA7fhtOlUV81BsGnyRWiQiEJEBgDkTAfVrqEZ88-Ac/edit?usp=sharing

wrote this just like a school essay

stayed up all night in one sitting, quality and coherence probably diminishes as it goes on

shoddy proofread and decisions regarding when to start new paragraphs were arbitrary

[scenic moth]

Thanks a lot for a response like that!

[past cloak]

I haven't read the above doc, but the short answer should be anything above a frame (~16ms) could cause inputs to be delayed, yes. Celeste polls keyboard state at the beginning of a frame as far as I remember.

Happy to be corrected though, but that's my understanding.