What is being tested?

The provided benchmark measures the performance difference between two approaches: using the JavaScript spread operator (...) to merge objects and Object.assign().

Options compared:

There are two options being compared:

1. Using the spread operator: The syntax { ...firstObject, ...secondObject } is used to merge two objects, firstObject and secondObject, into a new object, finalObject.
2. **Using Object.assign(): The Object.assign()` method is used to create a new object by copying all enumerable own properties from one or more source objects into a target object.

Pros and Cons of each approach:

• Using the spread operator:
  • Pros:
    • More concise and readable syntax.
    • Can be faster due to the compiler optimizations for this specific use case.
  • Cons:
    • May not work as expected if used with non-object literals or complex data structures.
    • Performance may vary depending on the JavaScript engine and browser implementation.
• Using Object.assign():
  • Pros:
    • More versatile and flexible, working with various types of objects and data structures.
    • Easier to debug and maintain due to its well-established API.
  • Cons:
    • Less readable syntax, requiring more explicit code.

Library/Functionality:

The Object.assign() method is a built-in JavaScript function that belongs to the ECMAScript standard. It's widely supported across different browsers and environments.

Special JS features/syntax:

This benchmark does not use any special or experimental JavaScript features or syntax.

Other alternatives:

If you're interested in exploring alternative methods for merging objects, some other options include:

• reduce(): You can use the reduce() method to merge two arrays into a new array.
• concat(): The concat() method can be used with an array of objects to merge them.
• Custom functions or libraries (e.g., Lodash's merge() function)

Keep in mind that each approach has its trade-offs and use cases, so it's essential to choose the most suitable one depending on your specific requirements.

Benchmark preparation code:

The provided Script Preparation Code is empty, which means that any custom setup or configuration for the benchmark should be done within the individual test case definitions. The Html Preparation Code is also empty, indicating that no HTML-specific setup is required for this benchmark.