There are some activities that are performed in response to interrupts, like updating timers, including the one used by millis(). You could take careful aim at your foot, and disable interrupts.
I don't think that this is going to be a solution to your unstated problem, though. So much stuff that the Arduino does, like PWM, Servo control, receiving serial data, updating timers, etc. requires interrupts.
I do need to have a precise timing(without any jitter)
Well, now, that is going to be difficult if you've disabled the timers.