Benchmark: test123kjfhneurkgewrxfiewhlrugxerg123

Script Preparation code:

var getLabel = (key) => {
  switch (key) {
    case 'a':
    	return 'a';
    case 'b':
    	return 'b';
    default:
    	return 'c';
  }
}

var dictionary = {
  a: 'a',
  b: 'b',
  c: 'c',
}

Tests:

1
const obj = {}; for (const key of Object.values(dictionary)) { obj[key] = { value: key, label: getLabel(key), } }
2
const obj = Object.fromEntries(Object.values(dictionary).map((item) => ([item.value, item])));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
1
2

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser/OS: Chrome 124 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
1	7255506.5 Ops/sec
2	3090829.8 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**Benchmark Definition:**

The benchmark is testing two different approaches to create an object in JavaScript, using two different methods:

1. `for...of` loop with `Object.values()`
2. `Object.fromEntries()` method

The script preparation code defines a function `getLabel(key)` that returns a string based on the value of the `key`. The `dictionary` object is defined as an object with keys 'a', 'b', and 'c' and corresponding values.

**Script Preparation Code:**

```javascript
var getLabel = (key) => {
  switch (key) {
    case 'a':
      return 'a';
    case 'b':
      return 'b';
    default:
      return 'c';
  }
}

var dictionary = {
  a: 'a',
  b: 'b',
  c: 'c',
};
```

**Html Preparation Code:**

There is no HTML preparation code, so we'll focus on the JavaScript implementation.

**Individual Test Cases:**

The benchmark defines two individual test cases:

1. `Test Case 1:`

```javascript
const obj = {};
for (const key of Object.values(dictionary)) {
  obj[key] = {
    value: key,
    label: getLabel(key),
  };
}
```

This code uses a `for...of` loop to iterate over the values in the `dictionary` object. For each value, it creates an object with two properties: `value` and `label`. The `label` property is set using the `getLabel()` function.

2. `Test Case 2:`

```javascript
const obj = Object.fromEntries(Object.values(dictionary).map((item) => ([item.value, item])));
```

This code uses the `Object.fromEntries()` method to create an object from an array of key-value pairs. The key is taken from the value in the `dictionary` object, and the value is taken from the same object.

**Test Results:**

The benchmark results show the raw UA string, browser, device platform, operating system, executions per second, and test name for each test case.

In this case, the results indicate that:

* Test Case 1 (`for...of` loop) executed at a rate of approximately 7.25 million executions per second.
* Test Case 2 (`Object.fromEntries()` method) executed at a rate of approximately 3.09 million executions per second.

**Pros and Cons:**

Here are some pros and cons for each approach:

1. `for...of` loop with `Object.values()`
	* Pros:
		+ Easy to understand and implement.
		+ Allows for flexibility in iteration order.
	* Cons:
		+ May be slower due to the need for explicit looping.
2. `Object.fromEntries()` method
	* Pros:
		+ More concise and expressive than traditional loop-based approaches.
		+ Can be faster due to optimized implementation.
	* Cons:
		+ May require more mental overhead to understand and implement.

**Other Alternatives:**

Some other alternatives for creating objects in JavaScript include:

1. `Object.assign()`
2. Spread operator (`{...}`)
3. `Array.prototype.reduce()` method

Each of these approaches has its own pros and cons, which can be discussed in more detail depending on the specific requirements of the project.

**Special JS Features or Syntax:**

In this benchmark, we see the use of:

1. Arrow functions (`() => { ... }`)
2. Object destructuring (`const obj = Object.fromEntries(...)`)
3. Spread operator (`{...}`)
4. ES6-style template literals (e.g., `var dictionary = { a: 'a', b: 'b', c: 'c' };`)

These features are all part of modern JavaScript and can greatly simplify code readability and maintainability.

Note that the benchmark does not use any other special JS features or syntax.

Related benchmarks:

test123kjfhneurkgewrxfiewhlrugxerg123 (version: 1)

Comparing performance of: 1 vs 2

Created: one year ago by: Registered User

Jump to the latest result

1

2

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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