Run results for: split chunk by splice vs slice

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser: Chrome 114

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Script Preparation code:

var CHUNK_SIZE = 500;
var list = [];
for (var i = 0; i < 1E6; i++) {
    list.push(i);
}

Tests:

slice
let chunks = []; let chunkStartIndex = 0; while (chunkStartIndex < list.length) { chunks.push(list.slice(chunkStartIndex, chunkStartIndex += CHUNK_SIZE)); }
splice from the beginning
let chunks = []; while (list.length) { chunks.push(list.splice(0, CHUNK_SIZE)); }
splice from the end
const remainder = list.length % CHUNK_SIZE; let chunkIndex = Math.ceil(list.length / CHUNK_SIZE); let chunks = new Array(chunkIndex); if (remainder) chunks[--chunkIndex] = list.splice(list.length - remainder); while (--chunkIndex >= 0) chunks[chunkIndex] = list.splice(chunkIndex * CHUNK_SIZE);