     {
         // if the oldest operation was performed less than _period ago, we need to throttle
         var elapsed :int = timeStamp - _ops[_oldestOp];
-        // if negative time elapsed, we must be running on windows; let's just cope by not
-        // throttling
+        // cope with negative time elapsed (shouldn't happen) by not throttling
         return (elapsed >= 0 && elapsed < _period);
     }
 

     * if the limit is decreased.
     *
     * @param operations the new maximum number of operations.
     * @param period the new period.
     */
    public function reinit (operations :int, period :int) :void
    {
        var ops :Array = new Array(operations);
        // copy up to 'operations' of our most recent operations into our new array
        for (var ii :int = 0; ii < operations; ii++) {
            ops[operations-ii-1] = _ops[(_oldestOp + _ops.length - ii - 1) % _ops.length];

        return _ops.length + " ops per " + _period + "ms (oldest " + oldest + ")";
    }

    protected function makeArray (operations :int) :Array
    {
        var ops :Array = new Array(operations);
        for (var ii :int =  0; ii < operations; ii++) {
            ops[ii] = 0;
        }
        return ops;
    }

    protected var _ops :Array;
    protected var _oldestOp :int;
    protected var _period :int;
