Benchmark: lasdkjgflkhwu egcwjxer123123

Script Preparation code:

var list = Array.from(Array(10000), (x,i) => [i,i]);

Tests:

1
const obj = {}; for (const item of list) { obj[item[0]] = item[1]; }
2
const obj = Object.fromEntries(list);
3
const obj = list.reduce((result, item) => { result[item[0]] = item[1]; return result; }, {})
4
const obj = list.reduce((result, item) => ({ ...result, [item[0]]: item[1], }), {})

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
1
2
3
4

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/127.0.0.0 Safari/537.36 Edg/127.0.0.0

Browser/OS: Chrome 127 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
1	16317.8 Ops/sec
2	3044.8 Ops/sec
3	16251.0 Ops/sec
4	122.0 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 provided benchmark JSON and explain what is being tested.

**Benchmark Definition**

The `Script Preparation Code` section defines the common setup for all test cases:
```javascript
var list = Array.from(Array(10000), (x,i) => [i,i]);
```
This code creates an array of 10,000 elements, where each element is an array containing two numbers. The purpose of this step is to prepare a large dataset that will be used in the subsequent test cases.

**Individual Test Cases**

The next section defines four individual test cases:

1. **Test Case 1: For...of Loop**
```javascript
const obj = {};
for (const item of list) {
    obj[item[0]] = item[1];
}
```
This code uses a `for...of` loop to iterate over the `list` array and assign each value to an object property.

2. **Test Case 2: Object.fromEntries**
```javascript
const obj = Object.fromEntries(list);
```
This code uses the `Object.fromEntries()` method, which creates a new object from an array of key-value pairs.

3. **Test Case 3: Reduce Method**
```javascript
const obj = list.reduce((result, item) => {
    result[item[0]] = item[1];
    return result;
}, {});
```
This code uses the `reduce()` method to iterate over the `list` array and build an object by assigning each value to a property.

4. **Test Case 4: Spread Operator**
```javascript
const obj = list.reduce((result, item) => ({...result, [item[0]]: item[1]}), {});
```
This code uses the spread operator (`{...result, ...}`) to create a new object by spreading an existing object and then adding new properties.

**Options Compared**

The test cases are comparing four different approaches:

* **For...of Loop**: A simple iterative approach using a `for...of` loop.
* **Object.fromEntries**: A method-based approach using the `Object.fromEntries()` method.
* **Reduce Method**: An array-based approach using the `reduce()` method.
* **Spread Operator**: An object-based approach using the spread operator (`{...result, ...}`).

**Pros and Cons**

Each approach has its pros and cons:

* **For...of Loop**:
	+ Pros: Simple and easy to understand.
	+ Cons: May be slower than other approaches due to its iterative nature.
* **Object.fromEntries**: Pros: Concise and efficient. Cons: Limited compatibility with older browsers.
* **Reduce Method**:
	+ Pros: Flexible and powerful, but may require more memory for large datasets.
	+ Cons: Can be less readable than other approaches.
* **Spread Operator**:
	+ Pros: Modern and concise syntax.
	+ Cons: May not be supported in older browsers.

**Library and Purpose**

There are no libraries mentioned in the benchmark definition. However, `Object.fromEntries()` is a built-in method introduced in ECMAScript 2018.

**Special JS Features or Syntax**

None of the test cases use any special JavaScript features or syntax beyond what's standard in modern JavaScript.

Related benchmarks:

lasdkjgflkhwu egcwjxer123123 (version: 2)

Comparing performance of: 1 vs 2 vs 3 vs 4

Created: one year ago by: Registered User

Jump to the latest result

1

2

3

4

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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