Run results for: JSON.parse vs dataview

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:125.0) Gecko/20100101 Firefox/125.0

Browser: Firefox 125

Operating system: Linux

Device Platform: Desktop

Date tested: 5 months ago

Test name	Executions per second
JSON	55.7 Ops/sec
dataview	8283.1 Ops/sec

Script Preparation code:

var intObj = []

function getRandomArbitrary(min, max) {
  return Math.random() * (max - min) + min;
}

for(let i = 0; i < 250000; i++) {
  intObj.push(getRandomArbitrary(0, 1000000));
}

var buffer = new ArrayBuffer(4 + (intObj.length * 4));
var dv = new DataView(buffer);
dv.setInt32(0, intObj.length);
for(let i = 0; i < intObj.length; i++) {
  dv.setInt32(4 + (i * 4), intObj[i]);
}

var stringy = JSON.stringify(intObj);

Tests:

JSON
let parsed = JSON.parse(stringy); let a; a = parsed;
dataview
let newView = new DataView(dv.buffer); let offset = 0; let count = newView.getInt32(offset); offset += 4; for(let i = 0; i < count; i++) { let value = newView.getInt32(offset); offset += 4; }