toArray vs slice

Benchmark created on

Setup

var slice = Array.prototype.slice;
    
    function toArray(obj) {
      var arr = [];
      for (var i = 0, len = obj.length; i < len; i++) {
        arr[i] = obj[i];
      }
      return arr;
    }
    
    var test_arr1 = [];
    var test_arr2 = [];
    var test_arr3 = [];
    
    for (var i = 0; i < 10; i++) {
      test_arr1[i] = i;
    }
    
    for (var i = 0; i < 1000; i++) {
      test_arr2[i] = i;
    }
    
    for (var i = 0; i < 1000000; i++) {
      test_arr3[i] = i;
    }

Test runner

Ready to run.

Testing in
TestOps/sec
slice small
for (var i = 0; i < 100000; i++) {
  var temp = slice.call(test_arr1);
}
ready
toArray small
for (var i = 0; i < 100000; i++) {
  var temp = toArray(test_arr1);
}
ready
slice medium
for (var i = 0; i < 1000; i++) {
  var temp = slice.call(test_arr2);
}
ready
toArray medium
for (var i = 0; i < 1000; i++) {
  var temp = toArray(test_arr2);
}
ready
slice large
var temp = slice.call(test_arr3);
ready
toArray large
var temp = toArray(test_arr3);
ready
slice small single
var temp = slice.call(test_arr1);
ready
toArray small single
var temp = toArray(test_arr1);
ready
slice medium single
var temp = slice.call(test_arr2);
ready
toArray medium single
var temp = toArray(test_arr2);
ready

Revisions

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