String concat vs regex replace

JavaScript performance comparison

Test case created

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var view = {
      name: "test",
      value: 5
    },
    template = "Hello, my name is {name} and my value is {value}",
    render = function fmt(s,a,r){r=/\{([^}]+)\}/g;return s.replace(r,function(_,m){return a[m]})};
  };
</script>

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Testing in unknown unknown
Test Ops/sec
String join
 
//This would be an example of a compiled template
var rendered = "Hello, my name is " + view.name + " and my value is " + view.value;
 pending…
Using a regex
 
var rendered = render(template, view);
 pending…

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