Set interval for milliseconds not working

hello. when increment counter every millisecond setinterval, slow.

here code:

 

var second:number = 0;  var millisecond:number = 0;  function updatemil(){           millisecond ++; } setinterval(updatemil,1);  function updatesec(){           second++;           trace(millisecond+", "+second); } setinterval(updatesec,1000); 

 

and outputs:

 

133, 1

255, 2

387, 3

515, 4

647, 5

779, 6

 

where seconds on right updates every second correctly. surely milliseconds on left should in 1000 increments because 1000 milliseconds make second.

the fastest setinterval can loop is, on average, 1000/frame_rate ms frame_rate swf's frame rate.

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adobe