Benchmark: mfd_replace - MeasureThat.net

Tests:

split
var type = 'cost_revenue' var kebabCasedType = type.includes('_') ? type.split('_').join('-') : type
regex
var type = 'cost_revenue' var kebabCasedType = type.replace(/_/g, '-')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
split
regex

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 11_2_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.128 Safari/537.36

Browser/OS: Chrome 89 on Mac OS X 11.2.3

View result in a separate tab

Test name	Executions per second
split	3635775.0 Ops/sec
regex	7725390.5 Ops/sec

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

LLMs can make mistakes. Check important info.

I'd be happy to help explain the provided benchmark.

**Benchmark Definition and Script Preparation Code**

The benchmark definition is represented by a JSON object with a `Script Preparation Code` field set to null, which means that no code needs to be executed before running the benchmark. This suggests that the benchmark is likely focused on measuring the performance of a specific JavaScript operation or function, rather than any external dependencies.

**Individual Test Cases**

The benchmark consists of two test cases:

1. `split`: This test case involves splitting a string by underscores (`_`) and replacing them with hyphens (`-`). The original code is:
```javascript
var type = 'cost_revenue'
var kebabCasedType = type.includes('_') ? type.split('_').join('-') : type
```
This code uses a conditional statement to check if the string contains an underscore. If it does, it splits the string into substrings separated by underscores and joins them back together with hyphens using the `join()` method.

2. `regex`: This test case involves replacing underscores (`_`) in a string with hyphens (`-`) using regular expressions (regex). The original code is:
```javascript
var type = 'cost_revenue'
var kebabCasedType = type.replace(/_/g, '-')
```
This code uses the `replace()` method to replace all occurrences of an underscore followed by any number of whitespace characters with a hyphen. The `/g` flag at the end of the regex pattern ensures that all matches are replaced, not just the first one.

**Options Compared**

The two test cases compare the performance of two approaches:

1. `split`: This approach uses the built-in `split()` method and conditional statement to perform string manipulation.
2. `regex`: This approach uses regular expressions (regex) to replace underscores with hyphens.

**Pros and Cons**

Here are some pros and cons of each approach:

* `split`:
	+ Pros: Easy to read and understand, no need for regex expertise.
	+ Cons: May be slower than regex for larger strings due to the overhead of creating a new array.
* `regex`:
	+ Pros: Can handle more complex string manipulation, faster execution times for large strings.
	+ Cons: Requires regex expertise, can be less readable.

**Library and Purpose**

None of the test cases use any libraries or external dependencies. The code is self-contained and focuses on comparing two basic JavaScript operations.

**Special JS Feature or Syntax**

None of the provided code uses any special JavaScript features or syntax beyond what's typically found in everyday web development. No ES6+ features, async/await, etc., are present.

**Other Alternatives**

If you wanted to compare other approaches for string manipulation, here are some alternatives:

1. Using `replace()` with a non-greedy modifier (`?` instead of `*`) to match only the first occurrence of an underscore.
2. Using a custom function that manually iterates over the string and replaces underscores with hyphens.
3. Using a different library or framework-specific approach, such as using `lodash` or `underscore` for more advanced string manipulation.

Keep in mind that these alternatives would change the code and potentially introduce new trade-offs in terms of performance, readability, or maintainability.

Related benchmarks:

mfd_replace (version: 0)

Comparing performance of: split vs regex

Created: 3 years ago by: Guest

Jump to the latest result

split

regex

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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