A built game for Windows PC was tested on some computers. It runs in 40% of PCs with delayed input. For example, jumping motion occurs 800ms after the jump command. There are cases that exceeds 2000ms.
This problem has been reported on the web by other developers but has not been solved. Here’s a case: http://forum.unity3d.com/threads/keyboard-input-lag.67024
Processing capacity of computers didn’t seem to influence according to the test results. How to solve it?