Benchmark: asdøla skdøla sdasd

Script Preparation code:

var a = [
  'Lorem ipsum dolor sit amet',
  'Lorem ipsam dolor sit amet'
];
var reg1 = ['ipsam', 'ipsum'];
var reg2 = ['ips(a|u)m'];

Tests:

1
a.forEach(e => reg1.forEach(r => console.log(e.match(r))))
2
a.forEach(e => reg2.forEach(r => console.log(e.match(r))))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
1
2

Fastest: N/A

Slowest: N/A

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Autogenerated LLM Summary (model llama3.1:latest, generated one year ago):

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**Benchmark Description**

The benchmark tests two different approaches to searching for a pattern within a string using regular expressions in JavaScript. The test case involves iterating over an array of strings (`a`) and logging any matches found using two different regular expression patterns (`reg1` and `reg2`).

**Test Case 1: Using a Simple Regular Expression**

The first test case uses the following benchmark definition:
```javascript
a.forEach(e => reg1.forEach(r => console.log(e.match(r))))
```
Here, `reg1` is defined as an array of strings: `['ipsam', 'ipsum']`. The test iterates over each string in `a` and checks if it matches any of the patterns in `reg1` using the `match()` method.

**Test Case 2: Using a More Specific Regular Expression**

The second test case uses the following benchmark definition:
```javascript
a.forEach(e => reg2.forEach(r => console.log(e.match(r))))
```
In this case, `reg2` is defined as an array of regular expressions: `['ips(a|u)m']`. The test iterates over each string in `a` and checks if it matches any of the patterns in `reg2` using the `match()` method.

**What's Being Compared?**

The two test cases compare the performance differences between:

1. **Simple Regular Expression**: Using an array of strings (`reg1`) vs.
2. **More Specific Regular Expression**: Using a single regular expression with alternation (`reg2`).

**Pros and Cons of Each Approach:**

* **Simple Regular Expression (reg1)**:
	+ Pros: Easy to read and understand, straightforward implementation.
	+ Cons: May be less efficient due to the need for multiple `match()` calls per string.
* **More Specific Regular Expression (reg2)**:
	+ Pros: Can be more efficient by allowing a single regular expression to match multiple patterns.
	+ Cons: Requires a deeper understanding of regular expressions, may be harder to read and understand.

**Other Considerations:**

* **Browser Performance**: The benchmark results show significant performance differences between the two test cases on Safari 13 (174609.265625 executions per second vs. 96235.65625 executions per second).
* **Regular Expression Engines**: Different browsers have varying regular expression engines, which can impact performance.
* **Pattern Complexity**: The complexity of the patterns being matched can also affect performance.

**Library and Feature Information:**

No external libraries are used in this benchmark. However, it does use built-in JavaScript features like `Array.prototype.forEach()` and `String.prototype.match()`.

**Alternatives:**

If you need to search for patterns within strings efficiently, consider using:

1. **PCRE (Perl-Compatible Regular Expressions)**: A more powerful regular expression engine that can handle complex patterns.
2. **String.prototype.search()**: A method that allows searching for a pattern within a string without using regular expressions.

These alternatives may provide better performance and flexibility in certain scenarios. However, they also come with their own trade-offs and complexities.

Related benchmarks:

asdøla skdøla sdasd (version: 0)

Comparing performance of: 1 vs 2

Created: 6 years ago by: Guest

Jump to the latest result

1

2

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.1:latest, generated one year ago):