Benchmark: replaceAll vs regex replace without polyfil

Tests:

replace regex
"this is it".replace(/ /g, "+");
replace All
"this is it".replaceAll(" ", "+");

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 Sumamry (model llama3.2:3b, generated 4 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what's being tested, compared, and other considerations.

**Benchmark Overview**

The benchmark measures two approaches to replace whitespace characters (`\s`) with `+` characters in a string:

1. Using regular expressions (regex) with the `replace()` method.
2. Using a custom function called `replaceAll()` that is not part of the standard JavaScript library.

**Options Compared**

The two options are compared, which involves measuring their performance and execution speed on different devices and browsers. The test cases provide raw data from various devices and browsers, including:

* Device platform (Mobile or Desktop)
* Browser type (e.g., Mobile Safari 15)
* Operating system version
* Execution frequency per second

**Pros and Cons of Each Approach**

1. **Regular Expressions (`replace()` method)**:
	* Pros: widely supported by most JavaScript engines, easy to use for simple replacement tasks.
	* Cons: can be slower due to the overhead of compiling regex patterns, may have performance issues with complex or highly optimized regex patterns.
2. **Custom Function (`replaceAll()` method)**:
	* Pros: potentially faster than `replace()`, as it avoids the overhead of compiling a regex pattern and can be optimized for specific use cases.
	* Cons: not part of the standard JavaScript library, may have limited browser support, requires custom implementation.

**Library/Function Details**

The `replaceAll()` function is not part of the standard JavaScript library. It's likely a custom function or utility method developed by the benchmark creator to provide an alternative approach for replacing whitespace characters with `+` characters. Without more information about this function, its performance and accuracy are unknown.

**Special JS Feature/Syntax**

This benchmark does not mention any special JavaScript features or syntax that require attention from software engineers. However, it's worth noting that the use of a custom `replaceAll()` function may be an opportunity for optimization or improvement in terms of browser support and execution speed.

**Other Alternatives**

If you're interested in exploring alternative approaches to replace whitespace characters with `+` characters, some alternatives could include:

* Using the `String.prototype.replace()` method with a regex pattern that targets only whitespace characters.
* Utilizing a library like UglifyJS or CodeOptimize for optimized string replacement.
* Implementing a custom string replacement algorithm using bitwise operations.

Keep in mind that these alternatives might have their own trade-offs and may not offer significant performance improvements over the standard `replace()` method.

Latest run results:

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

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.3 Mobile/15E148 Safari/604.1

Browser/OS: Mobile Safari 15 on iOS 15.3.1

View result in a separate tab

Test name	Executions per second
replace regex	85987180.0 Ops/sec
replace All	11262730.0 Ops/sec

Related benchmarks:

replaceAll vs regex replace without polyfil (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 Sumamry (model llama3.2:3b, generated 4 days ago):