Benchmark: Array split vs string substring22

Script Preparation code:

var s1 = "12232324.343443";
var s2 = "9458";

Tests:

Array.split
var n1 = ~~s1; var n2 = ~~s2;
Substring
var n1 = Number(s1); var n2 = Number(s2);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.split
Substring

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36

Browser/OS: Chrome 98 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Array.split	4860543.5 Ops/sec
Substring	2238956.2 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**Benchmark Description**

The benchmark compares two approaches to convert string values to integers:

1. **Array.split**: This approach uses the `~~` operator, which attempts to convert a string value to an integer by splitting the string into substrings using spaces as delimiters and then taking the first substring.
2. **Substring**: This approach uses the built-in `Number()` function to directly convert the string values to integers.

**Options Compared**

The two options being compared are:

* `~~` operator (Array.split)
* Built-in `Number()` function (Substring)

**Pros and Cons of Each Approach**

1. **~~ Operator (Array Split)**
	* Pros:
		+ Can be implemented in a single line of code.
		+ May be more efficient than using the `Number()` function for certain string values.
	* Cons:
		+ Not as widely supported as the `Number()` function, and may not work correctly with all types of strings (e.g., strings containing non-numeric characters).
		+ Can be slower than the `Number()` function due to the overhead of splitting the string.
2. **Built-in Number() Function**
	* Pros:
		+ Widely supported across different browsers and platforms.
		+ Generally faster than the `~~` operator due to its optimized implementation.
	* Cons:
		+ May require additional code lines compared to the `~~` operator.

**Library Usage**

None of the test cases use any external libraries. The benchmark only relies on built-in JavaScript functions and operators.

**Special JS Features or Syntax**

The `~~` operator is a special feature in JavaScript that performs integer truncation. It was introduced in ECMAScript 5 (ES5) as a part of the "strict mode" syntax.

**Benchmark Preparation Code**

The benchmark preparation code creates two string variables, `s1` and `s2`, which contain numeric values:

```javascript
var s1 = "12232324.343443";
var s2 = "9458";
```

**Individual Test Cases**

There are two test cases in the benchmark:

1. **Array Split**
```javascript
var n1 = ~~s1;
var n2 = ~~s2;
```
This test case uses the `~~` operator to convert both string values to integers.

2. **Substring**
```javascript
var n1 = Number(s1);
var n2 = Number(s2);
```
This test case uses the built-in `Number()` function to directly convert both string values to integers.

**Latest Benchmark Result**

The benchmark result shows the execution time per second for each test case, measured on a Chrome 98 browser running on a Mac OS X 10.15.7 system:

* **Array Split**: 4,860,543 executions per second
* **Substring**: 223,8956 executions per second

Based on these results, it appears that the `Number()` function is significantly faster than the `~~` operator for this specific benchmark.

**Other Alternatives**

If you wanted to modify or extend this benchmark, here are some alternative approaches:

1. Use a different data type (e.g., floating-point numbers) in the string values.
2. Add additional variables or operations to the script preparation code.
3. Test multiple browsers or platforms using a different set of test cases.

Keep in mind that modifying or extending the benchmark may require adjusting the script preparation code and individual test cases accordingly.

Related benchmarks:

Array split vs string substring22 (version: 0)

Comparing performance of: Array.split vs Substring

Created: 2 years ago by: Guest

Jump to the latest result

Array.split

Substring

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):