Run results for: Object hasOwnProperty vs Set has

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:132.0) Gecko/20100101 Firefox/132.0

Browser: Firefox 132

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Object Lookup

2192.5M/s

Set Lookup

2186.7M/s

View exact numbers

Test name	Executions per second
✓ Object Lookup	2,192,506,880 Ops/sec
Set Lookup	2,186,672,640 Ops/sec

Script Preparation code:

var data = [];
for (let i = 0; i < 5000; i += 1) {
    data.push(i.toString());
}
var obj = data.reduce((p, c) => {
    p[c] = true;
    return p;
}, {});

var set = new Set(data);

Tests:

Object Lookup
obj.hasOwnProperty('123')
Set Lookup
set.has('123')