‘var’ declarations to the top of the function

JavaScript performance comparison

Test case created by Jerôme

Info

A good pratice is "Move ‘var’ declarations to the top of the function."

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    function demo1() {
      if (true) {
        var toto = true;
      }
    }
   
    function demo2() {
      var toto;
      if (true) {
        toto = true;
      }
    }
};
</script>

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Testing in unknown unknown
Test Ops/sec
Define in the function core
var truc;

truc = demo1();
pending…
Define var on top of function
var truc;

truc = demo2();
pending…

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