Measuring the performance of different JavaScript methods for adding elements to an array can be interesting.

What is being tested?

The benchmark tests four ways to add elements to an array:

1. Array.prototype.push: The traditional method of adding a single element to an array using the push() method.
2. Spread operator (arr = [...arr, 1]): A new ES6 feature that allows creating a new array by spreading the elements of an existing array and adding new elements.
3. Array.prototype.push() multiple: Adding multiple elements to an array using push().
4. Array.prototype.push.apply(): Using the apply() method to add multiple elements to an array.

Options compared

The benchmark compares the performance of these four methods on an initial array with three elements (['hello', true, 7']). The tests aim to measure which method is faster and more efficient.

Pros and cons of each approach:

1. Array.prototype.push:
   • Pros: Widely supported, simple to use.
   • Cons: May be slower for large arrays due to the overhead of creating a new array object.
2. Spread operator (arr = [...arr, 1]):
   • Pros: Can add multiple elements at once, efficient for growing arrays.
   • Cons: Requires ES6 support and may be slower than push() for small arrays.
3. Array.prototype.push() multiple:
   • Pros: Simple to use, widely supported.
   • Cons: May be slower due to the overhead of creating multiple array object allocations.
4. Array.prototype.push.apply():
   • Pros: Can add multiple elements at once, efficient for large arrays.
   • Cons: Less intuitive than other methods, may have performance variations depending on browser implementation.

Library and purpose

None mentioned in this benchmark definition.

No special JavaScript features or syntax are used in this benchmark.

Other alternatives

If you want to test more methods or explore alternative approaches, you can consider:

• Using a different data structure, such as an object or a Set.
• Testing the performance of other array methods, like splice(), unshift(), or concat().
• Adding more elements to the initial array to increase the size and see how the performance changes.

Keep in mind that these alternatives will require additional benchmarking effort and consideration of potential factors affecting performance.