Can't the timing (in)accuracies be worked around by javascript? There must be countless numbers of timer-triggered events in JS, not just the high-res timers but simple second-by-second counters, frame sync events, or even external I/O. Every possible time-based event needs to be made imprecise, otherwise programmers can derive a higher precision timer from them.
e.g. if you have a tight loop that just increments a counter, couldn't you just run that for a second (interrupted by a lower frequency timer source), then find out how many counts/second the JIT can perform, presumably millions or billions. To time operation 'X', you then just perform X and run the tight loop again, and compare how many fewer tight loops you completed.
e.g. if you have a tight loop that just increments a counter, couldn't you just run that for a second (interrupted by a lower frequency timer source), then find out how many counts/second the JIT can perform, presumably millions or billions. To time operation 'X', you then just perform X and run the tight loop again, and compare how many fewer tight loops you completed.