array join vs string connect

JavaScript performance comparison

Revision 76 of this test case created

Preparation code

<script>
  var alphabet = "a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z";
  var alphatmp = [];
 
  for(i=0;i<20000;i++)
      alphatmp.push(alphabet);
 
  var str_to_split = alphatmp.join(',');
  var myarray = str_to_split.split(',');
 
</script>

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Testing in unknown unknown
Test Ops/sec
array join
var tmp = [];
for (i=0;i<myarray.length;i++){
  tmp.push(myarray[i]);
}

var output = tmp.join('');
pending…
string connect
var output = '';
for (i=0;i<myarray.length;i++){
output += myarray[i];
}
 
pending…
array join (assuming predefined array)
var output = myarray.join('');
pending…

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