I'll break down the provided benchmark and explain what's being tested, the options compared, their pros and cons, and other considerations.

Benchmark Overview

The test compares two approaches for removing elements from an array: splice (Splice) and creating a new array using Array.from (Copy to new).

Script Preparation Code

The script preparation code creates a random array of 1000 integers between 0 and 100:

var randomArray = Array.from({length: 1000}, () => Math.floor(Math.random() * 100));

This array is used as input for both test cases.

Test Cases

There are two individual test cases:

1. Splice The test case uses splice to remove elements from the original array:

for (let i = randomArray.length - 1; i >= 0; --i) {
  if (randomArray[i] != 1) {
    continue;
  }
  randomArray.splice(i, 1);
}
return randomArray;

2. Copy to new The test case creates a new array using Array.from and copies the desired elements:

var newArray = [];
for (let i = randomArray.length - 1; i >= 0; --i) {
  if (randomArray[i] == 1) {
    continue;
  }
  newArray.push(randomArray[i]);
}
return newArray;

Library and Syntax

In this benchmark, Array.from is used to create a new array. This is a modern JavaScript feature introduced in ECMAScript 2015.

Options Compared

The two test cases compare the performance of:

• Splice: uses the splice method to remove elements from the original array.
• Copy to new: creates a new array using Array.from and copies the desired elements.

Pros and Cons

Here are some pros and cons of each approach:

Splice

Pros:

• Easy to implement
• No extra memory allocation is required

Cons:

• Can be slow, especially for large arrays
• Modifies the original array

Copy to new

Pros:

• Faster than splice for large arrays
• Does not modify the original array

Cons:

• Requires extra memory allocation
• More complex implementation

Other Considerations

When choosing between splice and Array.from, consider the following:

• If you need to remove elements from an array while iterating over it, splice can be a convenient option. However, if you're working with large arrays or performance is critical, Array.from might be a better choice.
• If you need to create a new array without modifying the original one, Array.from is the way to go.

Alternatives

Other alternatives for removing elements from an array include:

• Using filter() method
• Using a for loop with array indices
• Using some() and findIndex() methods

However, these approaches may have different performance characteristics or require additional memory allocation compared to splice and Array.from.