MeasureThat.net

Run results for: undefined vs. typeof vs. in vs. hasOwnProperty

Object lookup performance

Go to the benchmark
Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0
Firefox 56
Windows
Other
7 years ago
Test name Executions per second
hasOwnProperty 208677312.0 Ops/sec
bool with Array 517971232.0 Ops/sec
bool 516184576.0 Ops/sec
Script Preparation code:
AخA
 
var obj = { a: 1, b: 2, c: 3, d: 4, e: 5 };
Tests:

  • hasOwnProperty

     
    obj.hasOwnProperty( 'd' );

  • bool with Array

     
    !! obj['d'];

  • bool

     
    !! obj.d;