Key pressing slows down program execution?

[komame]

(08-05-2018 03:31 PM)Tyann Wrote:  Maybe the fact that a program can be stopped
with the key 'ON' and that there is a test in this sense when a key
is engaged.
Only a hypothesis.

If it works the way you wrote, the ON-key test is always performed because even if key is not pressed the test has to be checked. But when the result of the test is 'false' (other key is pressed) it shouldn't be so much affecting the time of program execution.