string concat join length plus

JavaScript performance comparison

Test case created by shekhei

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var str = "this is test this is test", count =100;
  };
</script>

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Testing in unknown unknown
Test Ops/sec
push join
 
var result = [];
for ( var i = 0; i < count; i++ ) {
  result.push(str);
}
result.join("");
 pending…
plus
 
var result = "";
for ( var i = 0; i < count; i++ ) {
  result += str;
}
 pending…
length join
 
var result = [];
for ( var i = 0; i < count; i++ ) {
  result[result.length] = str;
}
result.join("");
 pending…
string concat
 
var result = "";
for ( var i = 0; i < count; i++ ) {
  result = result.concat(str);
}
 pending…
push concat
 
var result = [];
for ( var i = 0; i < count; i++ ) {
  result.push(str);
}
Array.prototype.concat.apply("", result);
 pending…

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