Overview of the Benchmark

The provided benchmark measures the performance difference between using Object.assign() and the spread operator (...) when assigning large objects to a new variable in JavaScript.

Benchmark Definition JSON

The benchmark definition json contains two test cases:

1. "Object.assign"
2. "spread operator"

Each test case has a unique script preparation code that defines a large object params with various properties, including strings, numbers, booleans, and other data types. 3. The first test case uses the Object.assign() method to assign the params object to another object other. 4. The second test case uses the spread operator (...) to create a new object by spreading the params object's properties.

Options Compared

The benchmark compares two options:

1. Object.assign(): A widely used method for assigning objects in JavaScript.
2. Spread Operator (...): A newer, more concise way of creating objects by spreading existing objects' properties.

Pros and Cons of Each Approach

Object.assign():

Pros:

• Wide support across browsers and versions
• Can handle nested objects and arrays

Cons:

• Can be slower due to the overhead of function calls
• May not work as expected when dealing with non-object values (e.g., numbers, strings)

Spread Operator (...):

Pros:

• Faster execution time compared to Object.assign()
• More concise and readable code
• Works well with non-object values

Cons:

• Not supported in older browsers or versions
• May not work as expected when dealing with complex object structures

Library Used: None

There are no libraries used in this benchmark.

Special JS Feature/Syntax: None

This benchmark does not use any special JavaScript features or syntax, such as async/await, ES6 classes, or generators.

Other Alternatives

If you need to compare the performance of other assignment methods, consider these alternatives:

• Destructuring Assignment: Similar to the spread operator, but for objects instead of arrays.
• Array.prototype.slice() or Array.prototype.concat(): For assigning entire arrays instead of objects.

Keep in mind that these alternatives might not be as suitable for this specific benchmark, which focuses on object assignment.