Benchmark: compate splitjoin relaceregrex replaceall

Script Preparation code:

String.prototype.replaceAll1 = function(search, replacement) {
    var target = this;
    return target.replace(new RegExp(search, 'g'), replacement);
};
String.prototype.replaceAll2 = function(search, replacement) {
    var target = this;
    return target.replaceAll(search, replacement);
};

Tests:

replace regrex
"this is it".replace(/ /g, "+");
replace all
"this is it".replaceAll(" ", "+");
split join
"this is it".split(" ").join("+");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
replace regrex
replace all
split join

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):

LLMs can make mistakes. Check important info.

**Overview**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The provided JSON represents a benchmark definition, which includes the test cases to be measured. In this explanation, we'll break down what's being tested, compare different approaches, discuss pros and cons, and explore any special features or syntax used.

**Benchmark Definition**

The benchmark definition includes three main components:

1. **Script Preparation Code**: This code defines two string prototype methods: `replaceAll1` and `replaceAll2`. These methods are intended to replace all occurrences of a search pattern (`/ /g`) with a replacement string (`"+"`). The difference between these two implementations lies in the way they handle the replacement.
2. **Html Preparation Code**: There is no HTML preparation code provided, which means that only JavaScript execution times will be measured.
3. **Description and Test Cases**: Although there is no description for this benchmark, three test cases are defined:

* "replace regrex"
* "replace all"
* "split join"

These test cases aim to measure the performance of different string replacement methods.

**Options Compared**

The main options being compared are:

1. `replaceAll` (with a single parameter) vs. `replaceAll1` and `replaceAll2` (with two parameters).
2. Regular expression (`/ /g`) vs. non-regular expression (`" "`).

**Pros and Cons of Different Approaches**

Here's a brief analysis of each approach:

* **Regular Expression Replacement**: Using regular expressions provides more flexibility and power, but also introduces overhead due to the complexity of the regular expression engine.
	+ Pros: Can handle complex patterns, such as word boundaries or character classes.
	+ Cons: May be slower than non-regular expression approaches due to the additional processing required.
* **Non-Regular Expression Replacement**: Using a simple string comparison (`" "` ) is faster and more lightweight, but limited to basic replacement logic.
	+ Pros: Fastest approach for simple replacements.
	+ Cons: Limited flexibility and may not work correctly for complex patterns.

**Special Features or Syntax**

In this benchmark, the following special features are used:

* **Regular Expressions**: The `/ /g` pattern is used in the `replaceAll1` method. Regular expressions provide a powerful way to match patterns in strings.
	+ Note: Although regular expression replacement is being tested, there's no specific feature or syntax being evaluated for its performance.

**Other Alternatives**

If you're interested in exploring alternative string replacement methods, consider the following:

* **String.prototype.replace()**: This method is similar to `replaceAll1` and `replaceAll2`, but uses a different implementation.
* **Substring Replacement**: Instead of replacing all occurrences, you can use substring extraction to replace specific parts of the string.

In conclusion, MeasureThat.net's benchmark definition provides a simple yet effective way to measure JavaScript performance for common string replacement tasks. By understanding the options being compared and their pros and cons, developers can choose the best approach for their specific use cases.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Android 10; Mobile; rv:107.0) Gecko/107.0 Firefox/107.0

Browser/OS: Firefox Mobile 107 on Android

View result in a separate tab

Test name	Executions per second
replace regrex	3246578.8 Ops/sec
replace all	7195226.0 Ops/sec
split join	3665524.2 Ops/sec

Related benchmarks:

compate splitjoin relaceregrex replaceall (version: 0)

Comparing performance of: replace regrex vs replace all vs split join

Created: one year ago by: Guest

Jump to the latest result

replace regrex

replace all

split join

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):