Run results for: Looping Frozen object: Object Freeze vs Without Object Freeze

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Loop Frozen Object

9K/s

Loop Non-Frozen Object

9K/s

View exact numbers

Test name	Executions per second
✓ Loop Frozen Object	8,822 Ops/sec
Loop Non-Frozen Object	8,801 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

const birdSpecies = {
  forest: {
    species: [
      {
        name: "Northern Cardinal",
        physicalCharacteristics: {
          color: "Red",
          size: "Medium",
          beakType: "Conical"
        },
        diet: {
          primary: "Seeds",
          secondary: "Fruits"
        },
        habitat: "Woodlands and forests"
      },
      {
        name: "Woodpecker",
        physicalCharacteristics: {
          color: "Black, White, and Red",
          size: "Medium",
          beakType: "Chisel-shaped"
        },
        diet: {
          primary: "Insects",
          secondary: "Tree sap"
        },
        habitat: "Wooded areas"
      }
    ]
  },
  desert: {
    species: [
      {
        name: "Roadrunner",
        physicalCharacteristics: {
          color: "Brown and White",
          size: "Medium",
          beakType: "Long and Slim"
        },
        diet: {
          primary: "Insects",
          secondary: "Small reptiles"
        },
        habitat: "Desert and arid regions"
      },
      {
        name: "Cactus Wren",
        physicalCharacteristics: {
          color: "Brown with streaks",
          size: "Small",
          beakType: "Curved"
        },
        diet: {
          primary: "Insects",
          secondary: "Seeds"
        },
        habitat: "Cacti and desert shrubs"
      }
    ]
  },
  wetlands: {
    species: [
      {
        name: "Great Blue Heron",
        physicalCharacteristics: {
          color: "Blue-gray",
          size: "Large",
          beakType: "Long and Sharp"
        },
        diet: {
          primary: "Fish",
          secondary: "Amphibians"
        },
        habitat: "Wetlands and marshes"
      },
      {
        name: "American Coot",
        physicalCharacteristics: {
          color: "Dark gray with white bill",
          size: "Medium",
          beakType: "Flat and short"
        },
        diet: {
          primary: "Aquatic plants",
          secondary: "Small invertebrates"
        },
        habitat: "Lakes and wetlands"
      }
    ]
  }
}

const frozenObject = Object.freeze(birdSpecies)
const nonFrozenObject = birdSpecies

Tests:

Loop Frozen Object
for (const [habitat, data] of Object.entries(frozenObject)) { console.log(`Habitat: ${habitat}`) for (const bird of data.species) { console.log(` Name: ${bird.name}`) console.log(` Physical Characteristics:`) for (const [key, value] of Object.entries(bird.physicalCharacteristics)) { console.log(` ${key}: ${value}`) } console.log(` Diet:`) for (const [key, value] of Object.entries(bird.diet)) { console.log(` ${key}: ${value}`) } console.log(` Habitat: ${bird.habitat}`) } }
Loop Non-Frozen Object
for (const [habitat, data] of Object.entries(nonFrozenObject)) { console.log(`Habitat: ${habitat}`) for (const bird of data.species) { console.log(` Name: ${bird.name}`) console.log(` Physical Characteristics:`) for (const [key, value] of Object.entries(bird.physicalCharacteristics)) { console.log(` ${key}: ${value}`) } console.log(` Diet:`) for (const [key, value] of Object.entries(bird.diet)) { console.log(` ${key}: ${value}`) } console.log(` Habitat: ${bird.habitat}`) } }