Run results for: array find() vs js object

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_1_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 16

Operating system: iOS 16.1.2

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
prepare test	8.4 Ops/sec
object	21732.9 Ops/sec
array find	7.6 Ops/sec

Script Preparation code:

function makeid(length) {
    var result           = '';
    var characters       = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
    var charactersLength = characters.length;
    for ( var i = 0; i < length; i++ ) {
        result += characters.charAt(Math.floor(Math.random() * charactersLength));
    }
    return result;
}

var dataArr = [];
var dataObj = [];

for (var i = 0; i < 80000; i++) {
	var data = { id: i, displayName: makeid(5) };
  	dataArr.push(data);
  	dataObj[i] = data;
}

var toDisplay = [];

for (var i = 79000; i < 80000; i++) {
	toDisplay.push(i)
}

var toDisplaySet = new Set(toDisplay);

Tests:

prepare test
[...toDisplaySet].map(record => dataArr.find(e => e.id === record));
object
[...toDisplaySet].map(record => dataObj[record]);
array find
[...toDisplaySet].map(record => dataArr.find(e => e.id === record));

Run results for: array find() vs js object

prepare test

object

array find