Run results for: Search in array - find vs for loop vs object vs map

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:92.0) Gecko/20100101 Firefox/92.0

Browser: Firefox 92

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 3 years ago

Script Preparation code:

var arr = [];
for (let i = 0; i < 10000; i++) {
  arr.push({id: i, name: `object${i}`});
}

Tests:

Find
for (let i = 0; i < 10000; i+=2) { const val = arr.find(x => x.id === i); if (val.name !== `object${i}`) { throw new Error('wrong found'); } }
For loop
for (let i = 0; i < 10000; i+=2) { for (let j = 0, len = arr.length; j < len; j++) { if (arr[j].id === i) { const val = arr[j]; if (val.name !== `object${i}`) { throw new Error('wrong found'); } break; } } }
Object
const obj = arr.reduce((acc, x) => {acc[x.id] = x; return acc;}, {}); for (let i = 0; i < 10000; i+=2) { const val = obj[i]; if (val.name !== `object${i}`) { throw new Error('wrong found'); } }
Map
const mapping = new Map(arr.map(x => [x.id, x])); for (let i = 0; i < 10000; i+=2) { const val = mapping.get(i); if (val.name !== `object${i}`) { throw new Error('wrong found'); } }