Lets have a look at some of the most common and fastest loops used in ActionScript 3. Is int really faster than uint and Number? Is while loop faster than for? Is pre-increment faster than post-increment? To test all of these I have created benchmark test application on wonderfl. App compares loops with 10.000.000 iterations and logs testing times. To compare different variable types, loop methods, increment / decrement modes, there are buttons grouping each test. Please be patient with your first click, the model Array is being generated (Link button also generates linked list). The first test compares Arrays, second one Vectors.