Run results for: Object vs Array lookups

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:95.0) Gecko/20100101 Firefox/95.0

Browser: Firefox 95

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Array lookup	8520.1 Ops/sec
Obj lookuo	21190.8 Ops/sec

Script Preparation code:

var reportsArr = [{
    id: `john`,
    text: `one`
}, {
    id: `jane`,
    text: `two`
}, {
    id: `bob`,
    text: `three`
}]
var reportsObj = {
    ['john']: {
        text: `one`
    },
    [`jane`]: {
        text: `two`
    },
    [`bob`]: {
        text: `three`
    }
}

var i = 0,
    count = 1000,
    jane;

Tests:

Array lookup
for (i = 0; i < count; i++) { janeIndex = reportsArr.findIndex(el => el.id === 'jane'); }
Obj lookuo
for (i = 0; i < count; i++) { janeIndex = reportsObj['jane']; }

Run results for: Object vs Array lookups

Array lookup

Obj lookuo