Benchmark: Object look-up - MeasureThat.net

Script Preparation code:

var withPrototype = {};
var withoutPrototype = Object.create(null);

for (var i=0; i<100; ++i) {
  withPrototype[i] = true;
  withoutPrototype[i] = true;
}

var hasOwnProperty = Object.prototype.hasOwnProperty;

Tests:

access property with prototype
for (var i=0; i<100; ++i) { var key = ''+i; if (withPrototype[key]) continue; }
access property without prototype
for (var i=0; i<100; ++i) { var key = ''+i; if (withoutPrototype[key]) continue; }
in with prototype
for (var i=0; i<100; ++i) { var key = ''+i; if (key in withPrototype) continue; }
in without prototype
for (var i=0; i<100; ++i) { var key = ''+i; if (key in withoutPrototype) continue; }
hasOwnProperty with prototype
for (var i=0; i<100; ++i) { var key = ''+i; if (hasOwnProperty.call(withPrototype, key)) continue; }
hasOwnProperty without prototype
for (var i=0; i<100; ++i) { var key = ''+i; if (hasOwnProperty.call(withoutPrototype, key)) continue; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
access property with prototype
access property without prototype
in with prototype
in without prototype
hasOwnProperty with prototype
hasOwnProperty without prototype

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 6 years ago)

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0

Browser/OS: Firefox 57 on Windows 7

View result in a separate tab

Test name	Executions per second
access property with prototype	1360200.0 Ops/sec
access property without prototype	1359543.0 Ops/sec
in with prototype	1444515.0 Ops/sec
in without prototype	1385173.0 Ops/sec
hasOwnProperty with prototype	1033283.0 Ops/sec
hasOwnProperty without prototype	1016809.0 Ops/sec

Object look-up (version: 0)

Comparing performance of: access property with prototype vs access property without prototype vs in with prototype vs in without prototype vs hasOwnProperty with prototype vs hasOwnProperty without prototype

Created: 7 years ago by: Guest

Jump to the latest result

access property with prototype

access property without prototype

in with prototype

in without prototype

hasOwnProperty with prototype

hasOwnProperty without prototype

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A