Benchmark: hex substring vs slice

Script Preparation code:

hex = '#0ff4AA' ;

Tests:

substring()
if(hex[0]=="#"){ hex = hex.substring(1) }
slice()
if(hex[0]=="#"){ hex = hex.slice(1) }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
substring()
slice()

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0

Browser/OS: Firefox 115 on Windows 7

View result in a separate tab

Test name	Executions per second
substring()	67911760.0 Ops/sec
slice()	906903488.0 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**Benchmark Overview**

The benchmark compares two approaches to remove the '#' character from a hexadecimal string: `substring()` and `slice()`. The goal is to measure which approach is faster.

**Options Being Compared**

There are only two options being compared:

1. **`substring()`**: This method returns a new string that includes all characters in the original string, starting from the specified index (in this case, 1). When the first character is '#', it removes it.
2. **`slice()`**: This method returns a new string that includes all characters in the original string, starting from the specified index (in this case, 1). Like `substring()`, when the first character is '#', it also removes it.

**Pros and Cons of Each Approach**

Both methods have similar performance characteristics. However, there are some subtle differences:

* **`substring()`**: This method creates a new string object every time it's called, which can lead to more memory allocation and garbage collection overhead. On the other hand, `slice()` modifies the original string object, which might be slightly faster since it avoids creating a new object.
* **`slice()`**: As mentioned earlier, this method modifies the original string object. However, if the original string is very large, this can lead to memory issues and potentially cause performance degradation.

**Library/JS Feature Usage**

In this benchmark, both methods use JavaScript's built-in string manipulation functions. There are no external libraries or special JS features being used here.

**Special JS Syntax**

There's a slight mention of the `if` statement with conditional logic, but it doesn't involve any special syntax. It's just regular JavaScript conditionals.

**Other Alternatives**

If you wanted to compare these two approaches in a different way, you might consider testing:

* Using `replace()` instead of `substring()` or `slice()`. This method would replace the '#' character with an empty string.
* Comparing performance using other methods, such as using regular expressions or array manipulation.

Keep in mind that the specific test case and benchmark definition can significantly impact the results.

Related benchmarks:

hex substring vs slice (version: 0)

geting rid if '#'

Comparing performance of: substring() vs slice()

Created: one year ago by: Guest

Jump to the latest result

substring()

slice()

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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