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If you can choose between a .pop() or .shift() on a Array, what would be a wise decision?

As my http://jsperf.com/adding-items-array/6 test shows the unshift is awful for performance. The same counts for .shift(), awful performance.

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var array1 = new Array(2000);
var i = array1.length;
for (var j = 0; j < i; j++) array1[j] = {abc:1,eabefsa:2,ee:4,ff:['abc'],xx:12345,ole:{'asa':1}};
array1.reverse();
while (i--) {
 array1.pop();
}

var array1 = new Array(2000);
var i = array1.length;
for (var j = 0; j < i; j++) array1[j] = {abc:1,eabefsa:2,ee:4,ff:['abc'],xx:12345,ole:{'asa':1}};
while (i--) {
 array1.shift();
}

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published by V1 on 10th August 2010
• Revision 3: published by Sander Aarts on 10th August 2010
• Revision 5: published by Bruno Garcia on 10th August 2010
• Revision 6: published by Sander Aarts on 12th August 2010
• Revision 11: published on 1st February 2012
• Revision 12: published on 1st February 2012
• Revision 13: published on 2nd February 2012

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