if exists

JavaScript performance comparison

Revision 16 of this test case created

Info

A solution for checking if exists

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var myArray = [];
    myArray["ala"] = "ola";
    myArray["alama"] = "olama";
    myArray["alamakota"] = "olamakota";
};
</script>

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Testing in unknown unknown
Test Ops/sec
first elem var
var elem = myArray["ala"];
result = "";
if (elem) {
  result = elem;
}
pending…
first elem no var
result = "";
if (myArray["ala"]) {
  var elem = myArray["ala"];
  result = elem;
}
pending…
last elem var
var elem = myArray["alamakota"];
result = "";
if (elem) {
  result = elem;
}
pending…
last elem no var
result = "";
if (myArray["alamakota"]) {
  var elem = myArray["alamakota"];
  result = elem;
}
pending…

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