Benchmark: entries - MeasureThat.net

Script Preparation code:

window.exampleObject = {
    "_id": "61b11c05c5e24c0da269b7e3",
    "index": 0,
    "guid": "be5aeb28-6fa4-45e9-b41c-082cf3243065",
    "isActive": false,
    "balance": "$1,161.29",
    "picture": "http://placehold.it/32x32",
    "age": 26,
    "eyeColor": "blue",
    "name": "Mcintyre Carlson",
    "gender": "male",
    "company": "INRT",
    "email": "mcintyrecarlson@inrt.com",
    "phone": "+1 (971) 466-3875",
    "address": "520 Schaefer Street, Rivers, Hawaii, 461",
    "about": "Duis consectetur aliqua nisi tempor. Nulla id esse esse fugiat aliqua et. Occaecat laborum incididunt do enim eu labore in aute aliquip pariatur. Eiusmod sit nulla officia do culpa aliquip excepteur. Voluptate pariatur qui incididunt irure tempor nisi ad. Esse velit mollit commodo sit velit fugiat officia enim. Do cillum ipsum Lorem deserunt ad ad aliqua cupidatat enim in aliquip.\r\n",
    "registered": "2020-02-04T03:13:53 +08:00",
    "latitude": 27.659978,
    "longitude": 10.024633,
    "tags": [
        "aliqua",
        "nulla",
        "qui",
        "consectetur",
        "consectetur",
        "esse",
        "cillum"
    ],
    "friends": [{
            "id": 0,
            "name": "Bonnie Owens"
        },
        {
            "id": 1,
            "name": "Mara Petersen"
        },
        {
            "id": 2,
            "name": "Waller Miller"
        }
    ],
    "greeting": "Hello, Mcintyre Carlson! You have 1 unread messages.",
    "favoriteFruit": "apple"
}

Tests:

Object.entries
Object.entries(window.exampleObject)
Object.keys into array
Object.keys(window.exampleObject).map(k => [k, window.exampleObject[k]])

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object.entries
Object.keys into array

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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 definition and test cases.

**Benchmark Definition:**

The benchmark is defined in JSON format, specifying:

1. **Name:** The name of the benchmark, which is "entries".
2. **Description:** No description is provided for this benchmark.
3. **Script Preparation Code:** This code creates an object `window.exampleObject` with some properties, such as `_id`, `index`, `guid`, etc.
4. **Html Preparation Code:** No HTML preparation code is specified.

**Individual Test Cases:**

There are two test cases:

1. **Test Case 1:** "Object.entries(window.exampleObject)"
	* This test case uses the built-in JavaScript method `Object.entries()` to iterate over the properties of the `window.exampleObject` object.
2. **Test Case 2:** "Object.keys(window.exampleObject).map(k => [k, window.exampleObject[k]])"
	* This test case uses the `Object.keys()` method to get an array of property names from the `window.exampleObject` object, and then maps each property name to an array containing the property name and its corresponding value using the `window.exampleObject[k]` expression.

**Options Compared:**

The two test cases are comparing different approaches to iterate over the properties of an object:

1. **Test Case 1:** Uses the built-in `Object.entries()` method, which returns an array of [key, value] pairs.
2. **Test Case 2:** Manually iterates over the property names using `Object.keys()`, and then uses the `map()` method to create an array of arrays containing each property name and its corresponding value.

**Pros and Cons:**

* **Test Case 1 (Object.entries()):**
	+ Pros:
		- More concise and readable code.
		- Built-in method, so less chance of errors due to implementation details.
	+ Cons:
		- May be slower due to the overhead of a built-in method call.
* **Test Case 2 (Object.keys().map()):**
	+ Pros:
		- May be faster for large objects since it avoids the overhead of a built-in method call.
	+ Cons:
		- More verbose and error-prone code, especially if not implemented carefully.

**Libraries and Special Features:**

* **None:** Neither test case uses any external libraries. However, `Object.entries()` is a standard JavaScript method introduced in ECMAScript 2015 (ES6).
* **Special Feature:** None mentioned.

**Alternatives:**

Other alternatives for iterating over object properties include:

1. Using a `for...in` loop.
2. Using the `Array.from()` method with an array of property names and the spread operator (`...`) to create an array of arrays containing each property name and its corresponding value.

Here's an example using a `for...in` loop:
```javascript
const result = [];
for (const key in window.exampleObject) {
  if (Object.prototype.hasOwnProperty.call(window.exampleObject, key)) {
    result.push([key, window.exampleObject[key]]);
  }
}
```
And here's an example using `Array.from()` with `Object.keys()`:
```javascript
const result = Array.from(Object.keys(window.exampleObject), k => [k, window.exampleObject[k]]);
```
Note that these alternatives may have similar performance characteristics to the original test cases, depending on the specific implementation and use case.

Related benchmarks:

entries (version: 0)

Comparing performance of: Object.entries vs Object.keys into array

Created: 4 years ago by: Guest

Jump to the latest result

Object.entries

Object.keys into array

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):