Run results for: ArrayBuffer vs JSON serialization

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/132.0.6834.100 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 132

Operating system: iOS 18.2.1

Device Platform: Mobile

Date tested: 3 months ago

Test name	Executions per second
JSON serialization	2232.6 Ops/sec
ArrayBuffer serialization	33084.2 Ops/sec

Tests:

JSON serialization
const arr = Array.from({ length: 5000 }).map(() => Math.random()); const serialized = JSON.stringify(arr); const deserialized = JSON.parse(serialized); deserialized.map(x => 0.0); const serializedAgain = JSON.stringify(deserialized);
ArrayBuffer serialization
const arr = Array.from({ length: 5000 }).map(() => Math.random()); const buffer = new ArrayBuffer(arr.length * 4); const view = new Float32Array(buffer, 0, 4); view.map((_, idx) => arr[idx]); view.map(() => 0.0); const view2 = new Float32Array(buffer, 0, 4);

Run results for: ArrayBuffer vs JSON serialization

JSON serialization

ArrayBuffer serialization