Benchmark: Map.has vs Object hasOwnProperty vs direct check

Script Preparation code:

var map = new Map();
var obj = {};

var j = 0;
while (j < 10000) {
  var key = "Key_" + j;
  map.set(key, 5);
  obj[key] = 5;
  j += 1;
}

var stringKey = 'asdfasdjfa;sjfjaklfjklsjklajjjj;jlsjfajdfsfjs;fjsfka';

var i = 0, count = 1000, a;

Tests:

Map lookup
for (i = 0; i < count; i++) { a = map.has('stringKey'); }
Obj lookup
for (i = 0; i < count; i++) { a = obj.hasOwnProperty('stringKey'); }
direct check
a = obj['stringKey'] != null

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Map lookup
Obj lookup
direct check

Fastest: N/A

Slowest: N/A

Latest run results:

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Map.has vs Object hasOwnProperty vs direct check (version: 0)

Lookup of map vs object

Comparing performance of: Map lookup vs Obj lookup vs direct check

Created: one month ago by: Guest

Jump to the latest result

Map lookup

Obj lookup

direct check

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

No previous run results