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; WOW64; Trident/7.0; rv:11.0) like Gecko
IE 11
Windows 7
Other
7 years ago
Test name Executions per second
test truthyness 16524795.0 Ops/sec
test undefined 9385663.0 Ops/sec
test hasOwnProperty 14245664.0 Ops/sec
Script Preparation code:
AخA
 
var n = {};
Tests:

  • test truthyness

     
    !n.foo

  • test undefined

     
    n.foo === undefined

  • test hasOwnProperty

     
    !n.hasOwnProperty('foo')