Run results for: Testing for false vs === undefined vs hasOwnProperty for undefined member - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/109.0

Browser: Firefox 109

Operating system: Ubuntu

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
test truthyness	1357728000.0 Ops/sec
test undefined	1342046000.0 Ops/sec
test hasOwnProperty	1287650000.0 Ops/sec

Website performance monitoring

Script Preparation code:

var n = {};
var unde = undefined;

Tests:

test truthyness
while (true) { if (!n.foo) break; }
test undefined
while (true) { if (n.foo === unde) break; }
test hasOwnProperty
while (true) { if (!n.hasOwnProperty('foo')) break; }