Benchmark: split vs exec js

Script Preparation code:

var s = '4567894.213654654';

Tests:

1
s.split('.');
2
/\d+/.exec(s);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

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2

Fastest: N/A

Slowest: N/A

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

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

**Benchmark Overview**

The provided benchmark compares two approaches for extracting numbers from a string: `split()` and regular expression (`/\\d+/.exec(s)`). The goal is to determine which approach is faster.

**Options Compared**

There are two options being compared:

1. **`s.split('.');`**: This method splits the input string `s` into an array of substrings using the decimal point (`.`) as a separator. The resulting array will contain one element, which is the number `4567894.213654654`.
2. **`/\\d+/.exec(s);`**: This regular expression uses a pattern (`\\d+`) to match one or more digits in the input string `s`. The `exec()` method executes this pattern and returns a match object, which contains the extracted number.

**Pros and Cons**

**`split('.');`**

Pros:

* Easy to understand and implement
* Works for most cases where numbers are separated by dots

Cons:

* May not work correctly if there are multiple consecutive decimal points or other characters before the decimal point
* Can be slower due to string splitting and array creation

**`/\\d+/.exec(s);`**

Pros:

* More flexible and accurate, as it can match any sequence of digits
* Faster than `split('.');`, as it doesn't involve creating an array or iterating over individual characters

Cons:

* Requires knowledge of regular expressions, which can be complex to understand and implement
* May not work correctly if the input string contains non-numeric characters before the number

**Library Usage**

In this benchmark, no external libraries are explicitly used. However, JavaScript's built-in `String.prototype.split()` method uses a V8-specific implementation that might be optimized for performance.

**Special JavaScript Feature or Syntax**

There is no special JavaScript feature or syntax being tested in this benchmark. The focus is on comparing two simple approaches to extract numbers from a string.

**Alternative Approaches**

Other alternatives to compare numbers extracted from a string could include:

* Using `String.prototype.replace()` with a regular expression to remove all non-numeric characters
* Using `String.prototype.replaceAll()` (available in some browsers) to replace all non-numeric characters with an empty string
* Using a custom implementation that manually iterates over the input string to find and extract numbers

Keep in mind that these alternatives might have different performance characteristics or require additional setup.

Related benchmarks:

split vs exec js (version: 0)

Comparing performance of: 1 vs 2

Created: 4 years ago by: Guest

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1

2

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):