benchmark.js

const fs = require('fs')
const json = fs.readFileSync('large.json').toString()

// Run this several times, collect times in spreadsheet, like an animal
start = Date.now(); JSON.parse(json); Date.now() - start

gen.py

import json
import uuid


def generate_large_json(num_objects):
    data = {}
    for i in range(num_objects):
        data['key-' + str(i)] = {
            'id': i,
            'name': 'name-' + str(uuid.uuid4()),
            'value': uuid.uuid4().hex * 10,
            'data': generate_large_json(int(num_objects / 10)) if num_objects > 5 else {}
        }
    return data


json.dump(generate_large_json(100), open('large.json', 'w'), indent=4)