join vs concat - blah blah (v3)

Revision 3 of this benchmark created on

Preparation HTML

<script>
  var max = 20;
  var colString = '<li class="cell"><p class="text"></p><div class="guide"><div class="vertical-guide"></div><div class="horizontal-guide"></div></div></li>';
  
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
concat
var newString = '';
for ( var i = 0; i < max; ++i )
{
    newString += colString;
}
ready
join
var a = [];
for ( var i = 0; i < max; ++i )
{
    a[i] = colString;
}

var newString = a.join( '' );
ready
join - pre allocation
var a = new Array( max );
for ( var i = 0; i < max; ++i )
{
    a[i] = colString;
}

var newString = a.join( '' );
ready

Revisions

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