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Run results for: Testing for false vs === undefined for undefined member

Is there a performance benefit to replacing === undefined with a logical test?

Go to the benchmark
Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; Trident/7.0; rv:11.0) like Gecko
IE 11
Windows
Other
7 years ago
Test name Executions per second
test truth 13990621.0 Ops/sec
test undefined 8024856.0 Ops/sec
Tests:

  • test truth

    AخA
     
    var n = {};
    while(true) {
        if(!n.foo) 
            break;
    }

  • test undefined

     
    var n = {};
    while(true) {
        if(n.foo===undefined) 
            break;
    }