Benchmark: rgx replace with if

Tests:

replace regex
const testString = "this is it"; testString.replace(/ /g, "+");
replace regex with if
const testString = "this is it"; if (testString.includes(" ")) { "this is it".replace(/ /g, "+"); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
replace regex
replace regex with if

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser/OS: Chrome 123 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
replace regex	11529212.0 Ops/sec
replace regex with if	11531917.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested, compared, and considered.

**Benchmark Overview**

The benchmark is testing two approaches to replace a space character with double quotes in a string:

1. Using regular expressions (`regex` approach)
2. Using an `if` statement with the `includes()` method (`with if` approach)

**Comparison Options**

In this benchmark, we have two options being compared:

A) **Regex Approach**: Using the `replace()` method with a regular expression to replace spaces with double quotes. The regex pattern `/ /g` matches one or more whitespace characters and replaces them with double quotes.

B) **With If Approach**: Using an `if` statement with the `includes()` method to check if the string contains a space character, and then replacing it with double quotes using the `replace()` method.

**Pros and Cons of Each Approach**

A) **Regex Approach**:
	* Pros: Efficient, concise, and flexible for various replacement tasks.
	* Cons: Can be slow for large strings, and may have performance issues in some browsers or versions.
B) **With If Approach**:
	* Pros: More readable, easier to understand, and potentially faster since it avoids the overhead of regular expressions.
	* Cons: May be slower due to the additional function call and string concatenation.

**Library/Function Used**

In this benchmark, we're using:

* `includes()` method: a built-in JavaScript method that checks if an element (in this case, a string) contains a specified value (a space character).

No external libraries are required for this benchmark.

**Special JS Features/Syntax**

None of the provided benchmark code uses any special JavaScript features or syntax beyond regular expressions and the `includes()` method. However, it's worth noting that some browsers may have different behavior or performance characteristics when using certain features like `includes()` or regular expressions.

**Alternative Approaches**

Other alternatives to consider for this benchmark could include:

* Using a more efficient string replacement algorithm, such as using a loop or a specialized library.
* Implementing a caching mechanism to store the replaced string, reducing the number of function calls and improving performance.
* Comparing the performance with other approaches that use different methods, such as using `String.prototype.replace()` or `String.prototype.split()`.

Keep in mind that these alternatives may not be directly comparable to the current benchmark code and would require additional testing to determine their effectiveness.

Related benchmarks:

rgx replace with if (version: 0)

Comparing performance of: replace regex vs replace regex with if

Created: one year ago by: Registered User

Jump to the latest result

replace regex

replace regex with if

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):