What is the correct way to clear Array in Haxe? -

what performant way clear array in haxe? assigning variable holding array empty one. , found on internet:

   public static function clear(arr:array<dynamic>){        #if (cpp)           arr.splice(0,arr.length);        #else           untyped arr.length = 0;        #end    } 

is best way? concerned 2 targets: js , cpp.

for part can use reassignment empty array clear array; becomes problematic if reference array important. in case, have works well.

that's answer, curiosity's sake, decided try timing of ways clear arrays. unfortunately, haven't used haxe in while , in computer's configurations must have changed, can compile neko , html5 @ moment. regardless, results interesting.

for test, ran 4 different clear algorithms through arrays ranging 8 1048576 integers in length. algorithms follows:

splice clear:

array.splice(0, array.length); 

length clear:

untyped array.length = 0; 

assignment clear:

array = []; 

pop clear:

while (array.length > 0)     array.pop(); 

all times shown below represent total time taken perform same operation 1 million times.

in neko:

• splice: 0.51 seconds
• length: 0.069 seconds
• assignment: 0.34 seconds
• pop: 0.071 0.179 seconds (scales linearly array gets bigger)

in html5:

• splice: 0.29 seconds
• length: 0.046 seconds
• assignment: 0.032 seconds
• pop: 0.012 seconds

these tests run on 64-bit windows 7 machine , firefox.

i'm bit surprised while loop method fasted algorithm in javascript; makes me think going on there. otherwise, length method on platforms support it.

my tests on github in case wants peer review methods , perhaps try out tests on platforms other neko , html5.