Run results for: Deep copy algo vs JSON manipulation - 120k lines of prices

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Browser: Chrome 130

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
JSON copy	32.9 Ops/sec
Deep copy	111.1 Ops/sec

Script Preparation code:

function deepCopy(obj) {
    var copy;

    // Handle the 3 simple types, and null or undefined
    if (null == obj || "object" != typeof obj) return obj;

    // Handle Date
    if (obj instanceof Date) {
        copy = new Date();
        copy.setTime(obj.getTime());
        return copy;
    }

    // Handle Array
    if (obj instanceof Array) {
        copy = [];
        for (var i = 0, len = obj.length; i < len; i++) {
            copy[i] = deepCopy(obj[i]);
        }
        return copy;
    }

    // Handle Object
    if (obj instanceof Object) {
        copy = {};
        for (var attr in obj) {
            if (obj.hasOwnProperty(attr)) copy[attr] = deepCopy(obj[attr]);
        }
        return copy;
    }

    throw new Error("Unable to copy obj! Its type isn't supported.");
};

function generate_data() {
  let data = {
    'prices': [],
    'other_prices' : [],
    'my object': [
      {'object a': 'object object'},
      {'object b': 'object object'}, 
      {'object c': 'object object', 'objectd': 36}, 
      5
    ]
  };

  // Helper function to generate random product names
  function generateProductName() {
    const products = ['Laptop', 'Phone', 'Tablet', 'Headphone', 'Speaker', 'Monitor', 'Keyboard', 'Mouse', 'Smartwatch', 'Camera'];
    const adjectives = ['Super', 'Ultra', 'Pro', 'Max', 'Plus', 'Lite', 'Mini', 'Advanced', 'Portable', 'Wireless'];
    const randomProduct = products[Math.floor(Math.random() * products.length)];
    const randomAdjective = adjectives[Math.floor(Math.random() * adjectives.length)];
    return `${randomAdjective} ${randomProduct}`;
  }

  // Helper function to generate random prices
  function generatePrice() {
    return (Math.random() * 1000).toFixed(2); // Random price between 0 and 1000 with 2 decimal places
  }

  // Generate 6000 product name and price entries
  for (let i = 0; i < 60000; i++) {
    const product = generateProductName();
    const price = generatePrice();
    data['prices'].push({ 'product': product, 'price': parseFloat(price) });
  }
  for (let i = 0; i < 60000; i++) {
    const product = generateProductName();
    const price = generatePrice();
    data['other_prices'].push({ 'product': product, 'price': parseFloat(price) });
  }

  return data;
};

var data = generate_data();

Tests:

JSON copy
a = JSON.parse(JSON.stringify(data));
Deep copy
a = deepCopy(data);

Run results for: Deep copy algo vs JSON manipulation - 120k lines of prices

JSON copy

Deep copy