MeasureThat.net

Run results for: Testing for false vs === undefined vs hasOwnProperty 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 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36
Chrome 60
Windows 7
Other
7 years ago
Test name Executions per second
test truthyness 678630080.0 Ops/sec
test undefined 4422156.0 Ops/sec
test hasOwnProperty 56587772.0 Ops/sec
Tests:

  • test truthyness

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

  • test undefined

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

  • test hasOwnProperty

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