Benchmark: regex vs split/pop

Script Preparation code:

var str = 'gid://shopify/Product/1234567890';
var regex = /\d+$/

Tests:

Regex
regex.exec(str)[0]
Split and Join
str.split('/').pop()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Regex
Split and Join

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

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

**What is being tested?**

The benchmark compares the performance of two approaches: using regular expressions (regex) to extract a substring from a string, and using the `split()` method with array slicing (`pop()`) to achieve the same result.

**Options compared**

There are two options being compared:

1. **Regex approach**: Using regex patterns to match and extract a substring from the input string.
2. **Split and Join approach**: Splitting the input string into an array using the `/` separator, and then accessing the last element of the array using `pop()`.

**Pros and Cons**

Here are some pros and cons of each approach:

1. **Regex approach**
	* Pros:
		+ Can be more flexible and powerful for complex string manipulation tasks.
		+ Can handle different data formats and formats with varying levels of nesting.
	* Cons:
		+ Can be slower than other methods, especially for large strings or complex regex patterns.
		+ Requires a good understanding of regex syntax and patterns to write effective code.
2. **Split and Join approach**
	* Pros:
		+ Typically faster than regex approaches, as it's just array manipulation.
		+ Easier to understand and implement, especially for simple string manipulation tasks.
	* Cons:
		+ May not be suitable for complex string manipulation tasks or data formats with varying levels of nesting.

**Library usage**

In this benchmark, no external library is used. The `split()` method is a built-in JavaScript method that works with strings.

**Special JS features/syntax**

There are no special JS features or syntax being tested in this benchmark. It's focused on the performance comparison between two basic string manipulation approaches.

**Alternative approaches**

Other alternatives to consider for string manipulation tasks include:

1. **Using `substr()` or `substring()`**: These methods can be used to extract a substring from a string, but they may not offer the same level of flexibility as regex.
2. **Using `indexOf()` and concatenation**: This approach involves finding the index of the target substring using `indexOf()`, and then concatenating the surrounding substrings to form the desired result.

The choice of approach depends on the specific use case, data format, and required performance characteristics.

I hope this explanation helps!

Related benchmarks:

regex vs split/pop (version: 0)

Comparing performance of: Regex vs Split and Join

Created: 5 years ago by: Guest

Jump to the latest result

Regex

Split and Join

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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