Benchmark: Split string return first part fork

Tests:

Split
"1213253612563.1231231231".split('.')[0]
Regex
"1213253612563.1231231231".replace(/\..*/,'');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Split
Regex

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's break down the JavaScript microbenchmark provided by MeasureThat.net.

**Benchmark Definition**

The benchmark definition is an empty JSON object, which means that no specific functionality or operation is being tested. Instead, the benchmark seems to be focused on comparing different approaches for manipulating strings in JavaScript.

**Individual Test Cases**

There are two test cases:

1. **Split**: This test case involves splitting a string using the `split` method. The input string is `"1213253612563.1231231231"`. The expected behavior is to split the string at the decimal point (`.`) and return only the first part.

```javascript
"1213253612563.1231231231".split('.')[0]
```

2. **Regex**: This test case involves replacing a specific pattern in a string using regular expressions (regex). The input string is also `"1213253612563.1231231231"`, but the expected behavior is to replace all occurrences of two consecutive dots (`..`) with an empty string.

```javascript
"1213253612563.1231231231".replace(/\\..*/,'')
```

**Options Compared**

In this benchmark, two options are being compared:

1. **Split**: This approach uses the `split` method to manipulate the input string.
2. **Regex**: This approach uses regular expressions (regex) to manipulate the input string.

**Pros and Cons of Each Approach**

Here's a brief analysis of each approach:

* **Split**:
	+ Pros: Simple, efficient, and widely supported in most browsers.
	+ Cons: May not be as flexible or powerful as regex for complex string manipulation tasks.
* **Regex**:
	+ Pros: Highly flexible, powerful, and suitable for complex string manipulation tasks.
	+ Cons: Can be slower than other approaches, especially for simple string operations. Also, regex can be difficult to read and maintain for complex patterns.

**Library and Special JS Feature**

There is no specific library used in these test cases. However, it's worth noting that the `replace` method with a regex pattern (`/\\..*/`) uses JavaScript's built-in regular expression engine.

No special JavaScript features or syntax are required to run these tests. Both approaches can be easily implemented using vanilla JavaScript.

**Other Alternatives**

If you're looking for alternative approaches, consider:

1. **Substring**: Instead of `split`, you could use the `substring` method to extract a specific part of the string.
2. **String manipulation functions**: Some browsers provide additional string manipulation functions, such as `str.split()` or `str.replaceAll()`, which might offer different performance characteristics.

Keep in mind that these alternatives may not be supported by all browsers or environments.

Overall, this benchmark provides a simple and informative comparison between two common approaches for manipulating strings in JavaScript. By running these tests, developers can better understand the trade-offs and limitations of each approach in their specific use cases.

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.1 Safari/605.1.15

Browser/OS: Safari 13 on Mac OS X 10.15.5

View result in a separate tab

Test name	Executions per second
Split	7654825.5 Ops/sec
Regex	56087664.0 Ops/sec

Related benchmarks:

Split string return first part fork (version: 0)

Comparing performance of: Split vs Regex

Created: 4 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 one month ago):