Let's dive into the details of this benchmark.

Benchmark Description

The benchmark compares three different methods for extracting a substring from a given string: substring, slice, and split. The goal is to measure which method performs best in terms of execution speed.

Test Cases

We have three test cases:

1. substring: This test uses the substring() method, which takes two arguments: the starting index and the ending index.

var substring = string.substring(string.indexOf(";base64,") + 1);

This method creates a new string containing all characters from the specified start to end indices.

2. slice: This test uses the slice() method, which also takes two arguments: the starting index and the ending index.

var substring = string.slice(string.indexOf(";base64,") + 1);

This method returns a new string containing all characters from the specified start to end indices.

3. split: This test uses the split() method with a regular expression (regex) as its argument.

var substring = string.split(/data:|;base64,/)[2];

This method splits the original string into an array of substrings based on the regex, and then returns the third element of that array.

Library

No external libraries are used in this benchmark.

Special JS feature or syntax

None mentioned in this benchmark.

Comparison of Options

Here's a brief comparison of the three methods:

• substring: This method is simple to use but has some limitations. It requires specifying both the start and end indices, which can lead to errors if not done correctly.
• slice: Similar to substring, this method also takes two arguments, but it's often preferred because it allows for more flexibility in indexing (e.g., using negative numbers or omitting one argument).
• split: This method is generally slower than the other two due to its regex-based approach. However, it can be useful when you need to split a string at multiple points.

Pros and Cons of Each Method

Benchmark Results

The latest benchmark results show that:

• substring: performs best with approximately 12 million executions per second
• slice: comes in second with around 11.6 million executions per second
• split: is significantly slower, with about 3.8 million executions per second

These results suggest that using substring or slice is generally the best approach for extracting a substring from a given string.

Please let me know if you have any further questions!