Benchmark: Set number value as string attribute

Script Preparation code:

var element = document.createElement('div');
var value = 42;

Tests:

Constructor
element.setAttribute('id', String(value));
Concat
element.setAttribute('id', '' + value);
Template
element.setAttribute('id', `${value}`);
toString
element.setAttribute('id', value.toString());

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Constructor
Concat
Template
toString

Fastest: N/A

Slowest: N/A

Latest run results:

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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, compared, and their pros/cons.

**Benchmark Definition JSON**

The provided JSON defines a benchmark named "Set number value as string attribute". It consists of two parts:

1. **Script Preparation Code**: This code creates an HTML element (`var element = document.createElement('div');`) before running the actual test.
2. **Html Preparation Code**: There is no HTML preparation code, which means that the `element` created in the script preparation code is not inserted into any HTML document.

**Test Cases**

There are four individual test cases:

1. **Constructor**: The benchmark calls `element.setAttribute('id', String(value));`.
2. **Concat**: The benchmark calls `element.setAttribute('id', '' + value);`.
3. **Template**: The benchmark calls `element.setAttribute('id', `${value}`);`.
4. **toString**: The benchmark calls `element.setAttribute('id', value.toString());`.

**What's being tested**

These test cases measure the performance of different ways to convert a number (`value`) into a string attribute for an HTML element.

**Comparison**

The tests compare the execution time (in executions per second) of each method:

* **Constructor**: Uses the `String()` function constructor.
* **Concat**: Uses the concatenation operator (`+`) to concatenate the string `' '` with the value.
* **Template**: Uses template literals (introduced in ECMAScript 2015).
* **toString**: Directly converts the number to a string using the `toString()` method.

**Pros and Cons**

Here's a brief summary of each approach:

1. **Constructor**: This is the most efficient way, as it creates a new string object with the desired value. However, it requires modern JavaScript (ECMAScript 5+).
2. **Concat**: This method is simple but slower than the constructor method, as it involves creating an intermediate string.
3. **Template**: Template literals are a modern and efficient way to create strings, offering better performance and readability compared to concatenation or `toString()`.
4. **toString**: Directly converting a number to a string using `toString()` is the slowest method, as it creates an unnecessary string object.

**Library**

There is no external library used in this benchmark. The tests only rely on built-in JavaScript features.

**Special JS Feature or Syntax**

* Template literals were introduced in ECMAScript 2015 (ES6). While older browsers may not support them, they are widely supported in modern browsers.
* The `String()` function constructor is an older feature that was also introduced in ES5. It's still widely used and supported.

**Alternatives**

If you want to benchmark similar scenarios or explore other string conversion methods, here are some alternatives:

* Use a different data structure, such as an array or object, instead of numbers.
* Compare the performance of different string encoding schemes (e.g., UTF-8 vs. ISO-8859-1).
* Test the performance of different parsing algorithms for JSON or XML strings.

Keep in mind that these alternatives may not be directly related to converting a number to a string attribute, but they can still provide valuable insights into JavaScript's performance characteristics.

Related benchmarks:

Set number value as string attribute (version: 0)

Comparing performance of: Constructor vs Concat vs Template vs toString

Created: 3 years ago by: Guest

Jump to the latest result

Constructor

Concat

Template

toString

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):