Benchmark: split join vs regex global replace

Tests:

split and join
const output = 'com.google.something.anotherthing'.split('.').join('/')
regex replace
const output = 'com.google.something.anotherthing'.replace(/\./g, '/')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
split and join
regex replace

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36

Browser/OS: Chrome 104 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
split and join	4491545.5 Ops/sec
regex replace	5038974.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases to understand what is being tested.

**Benchmark Definition**

The benchmark definition provides two different approaches to achieve the same result:

1. **Split and Join**: This approach uses the `split()` method to divide the input string into an array of substrings, followed by the `join()` method to concatenate the substrings back into a single string.
2. **Regex Replace**: This approach uses a regular expression (`/\\./g`) to replace occurrences of `\.` with `/` in the input string.

**Options Compared**

The two approaches are compared in terms of their performance, which is measured by the number of executions per second.

**Pros and Cons of Each Approach**

1. **Split and Join**:
	* Pros: Simple, readable, and maintainable code.
	* Cons: May be slower than other approaches due to the overhead of creating an array and concatenating strings.
2. **Regex Replace**:
	* Pros: Can be faster than split and join since it avoids the overhead of creating an array and concatenating strings.
	* Cons: Requires a good understanding of regular expressions, which can be complex and error-prone.

**Library and Its Purpose**

In this benchmark, the `split()` method is used with the `/` character as its separator. The purpose of the `split()` method is to divide a string into an array of substrings based on a specified separator.

**Special JS Feature or Syntax**

There are no special JavaScript features or syntax mentioned in this benchmark. However, it's worth noting that the `\.` character is escaped with a backslash (`\\`) because in regular expressions, `.` has a special meaning (it matches any character except newline).

**Other Alternatives**

If you're looking for alternative approaches to achieve the same result, here are a few options:

1. **Using `string.prototype.replace()` without regex**: Instead of using a regular expression, you can use the `replace()` method with a simple string replacement.
2. **Using `path.join()` from Node.js**: If you're running this code in a Node.js environment, you can use the `path.join()` function to concatenate strings and avoid the need for `\.`.
3. **Using a library like Lodash**: You can use a utility library like Lodash to simplify string manipulation and reduce the risk of errors.

Overall, the choice of approach depends on your specific requirements, performance considerations, and personal preference.

Related benchmarks:

split join vs regex global replace (version: 0)

Comparing performance of: split and join vs regex replace

Created: 2 years ago by: Guest

Jump to the latest result

split and join

regex replace

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):