Reverse Array Concatenation

Benchmark created on

Description

Tests if it is faster to reverse the array and use Array.concat(), or just iterate in reverse order, using Array.push() for each.

Setup

targetArray = (function() {
      var _i, _results;
      _results = [];
      for (i = _i = 0; _i < 10; i = ++_i) {
        _results.push(i);
      }
      return _results;
    })();
    
    testArray = (function() {
      var _i, _results;
      _results = [];
      for (i = _i = 10; _i <= 15; i = ++_i) {
        _results.push(i);
      }
      return _results;
    })();

Test runner

Ready to run.

Testing in
TestOps/sec
Reverse, then concat()
targetArray.concat(testArray.reverse());
ready
push() in descending loop
for (_i = testArray.length - 1; _i >= 0; _i += -1) {
  targetArray.push(testArray[_i]);
}
ready

Revisions

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