Run results for: optional chain vs typeof

Run details:

User agent: 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

Browser: Chrome 109

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year 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:

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 }