As3 - How to clear an array efficiently?

Question

I've been looking to clear an array in ActionScript 3.

Some method suggest : array = []; (Memory leak?)

Other would say : array.splice(0);

If you have any other, please share. Which one is the more efficient?

Thank you.

Answer 1

array.length = 0 or array.splice() seems to work best for overall performance.

array.splice(0); will perform faster than array.splice(array.length - 1, 1);

Answer 2

For array with 100 elements (benchmarks in ms, the lower the less time needed):

// best performance (benchmark: 1157)
array.length = 0;
// lower performance (benchmark: 1554)
array = [];
// even lower performance (benchmark: 3592)
array.splice(0);