Benchmark: replaceall-vs-regex

Tests:

replace regex
"Morbi vehicula feugiat ex et venenatis. Aliquam pellentesque sem venenatis imperdiet aliquet. Suspendisse quis pretium nulla, vel tristique diam. Donec sit amet finibus dui. Nunc porttitor vulputate nisl, quis efficitur lacus cursus sit amet. Ut id mollis metus, in viverra eros. Cras non urna ac arcu dictum mattis id in quam. In vestibulum rutrum mi id rhoncus. Nam vel odio metus. Nullam ornare elit a nulla iaculis pretium. Nam leo enim, volutpat non malesuada convallis, lacinia eget nisl. Cras justo mauris, vestibulum id venenatis vitae, sodales vel augue. Fusce posuere dui tortor, vitae sagittis lectus molestie id. Sed facilisis a eros a sollicitudin. Praesent blandit, tortor quis facilisis mattis, est quam sagittis leo, ac congue tortor libero ut nisi. Nam eu urna ut justo scelerisque ultricies at ut neque".replace(/a/g, "thisisalongword");
replace all
"Morbi vehicula feugiat ex et venenatis. Aliquam pellentesque sem venenatis imperdiet aliquet. Suspendisse quis pretium nulla, vel tristique diam. Donec sit amet finibus dui. Nunc porttitor vulputate nisl, quis efficitur lacus cursus sit amet. Ut id mollis metus, in viverra eros. Cras non urna ac arcu dictum mattis id in quam. In vestibulum rutrum mi id rhoncus. Nam vel odio metus. Nullam ornare elit a nulla iaculis pretium. Nam leo enim, volutpat non malesuada convallis, lacinia eget nisl. Cras justo mauris, vestibulum id venenatis vitae, sodales vel augue. Fusce posuere dui tortor, vitae sagittis lectus molestie id. Sed facilisis a eros a sollicitudin. Praesent blandit, tortor quis facilisis mattis, est quam sagittis leo, ac congue tortor libero ut nisi. Nam eu urna ut justo scelerisque ultricies at ut neque".replaceAll("a", "thisisalongword");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
replace regex
replace all

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

**Benchmark Overview**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks to compare the performance of different approaches to a specific task. In this case, we're analyzing a benchmark that compares two methods: `replace` (using a regular expression) and `replaceAll` (a built-in string method).

**Benchmark Definition**

The benchmark definition is provided as a JSON object:
```json
{
  "Name": "replaceall-vs-regex",
  "Description": null,
  "Script Preparation Code": null,
  "Html Preparation Code": null
}
```
This definition specifies the benchmark's name, description, and preparation code (which is empty in this case).

**Individual Test Cases**

The benchmark consists of two test cases:
```json
[
  {
    "Benchmark Definition": "\"Morbi vehicula feugiat ex et venenatis. Aliquam pellentesque sem venenatis imperdiet aliquet. Suspendisse quis pretium nulla, vel tristique diam. Donec sit amet finibus dui. Nunc porttitor vulputate nisl, quis efficitur lacus cursus sit amet. Ut id mollis metus, in viverra eros. Cras non urna ac arcu dictum mattis id in quam. In vestibulum rutrum mi id rhoncus. Nam vel odio metus. Nullam ornare elit a nulla iaculis pretium. Nam leo enim, volutpat non malesuada convallis, lacinia eget nisl. Cras justo mauris, vestibulum id venenatis vitae, sodales vel augue. Fusce posuere dui tortor, vitae sagittis lectus molestie id. Sed facilisis a eros a sollicitudin. Praesent blandit, tortor quis facilisis mattis, est quam sagittis leo, ac congue tortor libero ut nisi. Nam eu urna ut justo scelerisque ultricies at ut neque\".replace(/a/g, \"thisisalongword\");",
    "Test Name": "replace regex"
  },
  {
    "Benchmark Definition": "\"Morbi vehicula feugiat ex et venenatis. Aliquam pellentesque sem venenatis imperdiet aliquet. Suspendisse quis pretium nulla, vel tristique diam. Donec sit amet finibus dui. Nunc porttitor vulputate nisl, quis efficitur lacus cursus sit amet. Ut id mollis metus, in viverra eros. Cras non urna ac arcu dictum mattis id in quam. In vestibulum rutrum mi id rhoncus. Nam vel odio metus. Nullam ornare elit a nulla iaculis pretium. Nam leo enim, volutpat non malesuada convallis, lacinia eget nisl. Cras justo mauris, vestibulum id venenatis vitae, sodales vel augue. Fusce posuere dui tortor, vitae sagittis lectus molestie id. Sed facilisis a eros a sollicitudin. Praesent blandit, tortor quis facilisis mattis, est quam sagittis leo, ac congue tortor libero ut nisi. Nam eu urna ut justo scelerisque ultricies at ut neque\".replaceAll(\"a\", \"thisisalongword\");",
    "Test Name": "replace all"
  }
]
```
Each test case has a `Benchmark Definition` string that specifies the input text and the replacement pattern to use.

**Comparison Methods**

The two comparison methods being tested are:

1. **`replace`**: This method uses a regular expression to replace all occurrences of a specified substring (in this case, "a") with another string ("thisisalongword").
2. **`replaceAll`**: This is a built-in JavaScript method that replaces all occurrences of a specified substring with another string.

**Options Compared**

In this benchmark, we're comparing the performance of two options:

1. Using regular expressions (`replace`)
2. Using the `replaceAll` method

**Pros and Cons of Each Approach**

**Regular Expressions (Replace)**

Pros:

* More flexible and powerful than the built-in `replaceAll` method
* Can perform more complex text manipulations

Cons:

* Can be slower due to the overhead of compiling regular expressions
* May require additional setup and configuration

**Built-in `replaceAll` Method**

Pros:

* Faster than using regular expressions
* Simpler and easier to use
* Often comes with built-in optimizations for common use cases

Cons:

* Less flexible and powerful than regular expressions
* Limited support for complex text manipulations

**Other Considerations**

* The benchmark doesn't account for the size of the input string or other factors that could affect performance.
* It only tests two specific methods, so results may not be generalizable to other scenarios.

**Alternatives**

If you're looking for alternative approaches to replace text in JavaScript, some options include:

1. Using a library like `DOMPurify` or `text- replacement-library`, which provide more flexible and powerful string manipulation capabilities.
2. Implementing custom text replacement logic using a combination of regular expressions and string manipulation techniques.

Keep in mind that the best approach will depend on your specific use case and requirements.

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Safari/537.36

Browser/OS: Chrome 106 on Linux

View result in a separate tab

Test name	Executions per second
replace regex	297292.3 Ops/sec
replace all	302610.4 Ops/sec

Related benchmarks:

replaceall-vs-regex (version: 0)

Comparing performance of: replace regex vs replace all

Created: 2 years ago by: Guest

Jump to the latest result

replace regex

replace all

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):