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Run results for: optional chain vs typeof

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36
Chrome 109
Mac OS X 10.15.7
Desktop
2 years ago
Test name Executions per second
optional chain prop found 27315.6 Ops/sec
optional chain prop not found 27556.6 Ops/sec
typeof match 13632.3 Ops/sec
typeof mismatch 27603.3 Ops/sec
Script Preparation code:
AخA
 
var obj = { func: function (v) { return v; } };
Tests:

  • optional chain prop found

     
    for (let n = 0; n < 1000; n++) { const r = obj.func?.(true) ?? false }

  • optional chain prop not found

     
    for (let n = 0; n < 1000; n++) { const r = obj.func2?.(true) ?? false }

  • typeof match

     
    for (let n = 0; n < 1000; n++) { const r = typeof obj.func === 'function' ? obj.func(true) : false }

  • typeof mismatch

     
    for (let n = 0; n < 1000; n++) { const r = typeof obj.func2 === 'function' ? obj.func2(true) : false }