MeasureThat.net

Run results for: Testing for false vs undefined vs == null vs hasOwnProperty vs hasOwn for undefined member

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

Go to the benchmark
Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36
Chrome 96
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
test false 910495552.0 Ops/sec
test undefined 8206510.5 Ops/sec
test hasOwnProperty 82674992.0 Ops/sec
test == null 905790848.0 Ops/sec
test == undefined 8092202.5 Ops/sec
test static hasOwnProperty 3562475.2 Ops/sec
test static hasOwn 7572862.0 Ops/sec
Tests:

  • test false

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

  • test undefined

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

  • test hasOwnProperty

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

  • test == null

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

  • test == undefined

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

  • test static hasOwnProperty

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

  • test static hasOwn

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