keypress/release event timing issues

[Jan Dusek <j d most ujep cz>]

Hi, I'm writing a program that heavily depends on precise measurement of keystroke 
latencies.

I'd like to write it in GTK, but I'm having some timing issues. Would someone 
please explain to me (or point me out to an explanation) how the GdkEventKey.time 
in key_press_event is found?

I'm having some strange results - if I measure time-delta between successive 
keystrokes, I get values like: 56 55 55 49 48 48 47 47 39 39 31 - it's like 
there's 8ms[+-1ms] step between these so I'll never get a value like 44. (I've 
tried it on 2 different computers with the same results.)

Why is that? And is there anything I can do to suppress this behavior?

Thanks for any help.

Jan