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aerobatic · 3390 days ago · link · · parent · post: Can You Keep Perfect Time? Take This Test And Find Out!
Don't worry about getting 1000. USB keyboard response times have a standard deviation of 2.5-10ms, so anything above 900 is about as perfect as the computer can measure. There is also some timing variation inherent by measuring with javascript, though I'm not sure how much. EDIT: Got curious and looked into it some more - even 1000Hz gaming mice have a 1.8ms SD. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4374455/ I'm using SD rather than mean response time since it is more relevant to rhythm.