array join vs string connect (v43)

Revision 43 of this benchmark created on

Preparation HTML

<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<20;i++)
      alphatmp.push(alphabet);
  
  var str_to_split = alphatmp.join(',');
  var myarray = str_to_split.split(',');
  
</script>

Test runner

Ready to run.

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

var output = tmp.join('');
ready
string connect
var output = '';
for (i=0;i<myarray.length;i++){
output += myarray[i];
}
 
ready
string connect method
var output = '';
for (i=0;i<myarray.length;i++){
output = output.concat(myarray[i]);
}
 
ready
array join (with known size)
var tmp = [];
tmp.length = myarray.length;
for (i=0;i<tmp.length;i++){
  tmp[i] = myarray[i];
}

var output = tmp.join('');
ready
array join (with duplicated array)
var tmp = myarray.slice();
for (i=0;i<tmp.length;i++){
  tmp[i] = myarray[i];
}

var output = tmp.join('');
ready

Revisions

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