Run results for: JSON.parse vs dataview vs typedarray

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:129.0) Gecko/20100101 Firefox/129.0

Browser: Firefox 129

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

TypedArray

4.0M/s

dataview

4.0M/s

JSON

438K/s

View exact numbers

Test name	Executions per second
✓ TypedArray	4,014,333 Ops/sec
dataview	4,007,230 Ops/sec
JSON	438,411 Ops/sec

Script Preparation code:

var intObj = {alpha:12345678,beta:12345678,charlie:12345678,delta:12345678,foxtrot:12345678}
var typedArray = new Int32Array(12345678,12345678,12345678,12345678,12345678)
var buffer = new ArrayBuffer(20)
var dv = new DataView(buffer)
dv.setInt32(0,12345678)
dv.setInt32(4,12345678)
dv.setInt32(8,12345678)
dv.setInt32(12,12345678)
dv.setInt32(16,12345678)

Tests:

JSON
let stringy = JSON.stringify(intObj); let parsed = JSON.parse(stringy); let a; a = parsed;
TypedArray
let newBuffer = typedArray.buffer let parsedBuffer = new Int32Array(newBuffer) let b; b = parsedBuffer;
dataview
let dvBuffer = dv.buffer let newView = new DataView(dvBuffer) let c; c = newView;