Benchmark: Test of 2 - MeasureThat.net

Script Preparation code:

var data = [];
for (var i=0;i<10000;i++) {
  data.push({key: 'key' + i, value : 'value' + i})
}

Tests:

fomEntries
Object.fromEntries(data.map(({key, value}) => [key, value]))
reduce
data.reduce((acc, current) => { acc[current.key] = current.value; return acc; }, {});

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
fomEntries
reduce

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what's being tested, the options compared, pros and cons of each approach, and other considerations.

**Benchmark Definition**

The benchmark definition represents a microbenchmarking test created on MeasureThat.net. In this case, there are two individual test cases: `fomEntries` and `reduce`. Both tests use JavaScript as the programming language.

**Script Preparation Code**

The script preparation code is used to initialize the variables and data structure for each test case:

* For `Test of 2`, a JavaScript array `data` is created with 10,000 elements using a `for` loop. Each element has two properties: `key` and `value`.
* The `fomEntries` test case uses `Object.fromEntries()` to convert the `data` array into an object, where each property of the object corresponds to the `key` in the data.
* The `reduce` test case uses the `Array.prototype.reduce()` method to accumulate the values from the `data` array into an object, where each key is generated using the `key` property from the data.

**Html Preparation Code**

The HTML preparation code is not provided for this benchmark, which means that it does not use any HTML-related functionality in its test case.

**Library Usage**

Both tests use built-in JavaScript libraries and methods:

* `Object.fromEntries()` is a modern JavaScript method introduced in ECMAScript 2015 (ES6). It creates an object from an array of key-value pairs.
* `Array.prototype.reduce()` is also a built-in JavaScript method, which applies a function to each element of the array and reduces it to a single output value.

**Special JS Feature or Syntax**

There are no special JavaScript features or syntax used in these test cases. They rely solely on standard JavaScript libraries and methods.

**Comparison of Options**

The two tests compare different approaches to achieve the same result:

* `fomEntries` uses `Object.fromEntries()`, which is a more modern and concise way to create an object from an array.
* `reduce` uses the older, more verbose approach of accumulating values into an object using `Array.prototype.reduce()`.

**Pros and Cons**

Here are some pros and cons of each approach:

* **fomEntries**:
	+ Pros: More concise, readable, and efficient ( thanks to the optimized implementation of `Object.fromEntries()`).
	+ Cons: May not be supported in older browsers or environments that do not have ES6 support.
* **reduce**:
	+ Pros: Wide browser compatibility, as it is a standard method since ECMAScript 2009.
	+ Cons: Less concise and more verbose than the `fomEntries` approach.

**Other Considerations**

When choosing between these two approaches, consider the following factors:

* Performance: Both methods have similar performance characteristics, but `fomEntries()` might be slightly faster due to its optimized implementation.
* Browser Support: If you need to support older browsers or environments without ES6 support, use the `reduce` approach.
* Readability and Maintainability: The concise nature of `fomEntries` can make it more readable and maintainable, especially for modern JavaScript developers.

**Alternative Approaches**

If you want to explore alternative approaches or modify these tests, consider the following options:

* Use a different data structure, such as a Map or an object literal.
* Implement your own loop-based solution using `Array.prototype.forEach()` or `Array.prototype.forEachIn()`.
* Experiment with other modern JavaScript features, such as arrow functions, template literals, or the `Spread operator`.

Keep in mind that benchmarking is an iterative process, and you may need to test multiple approaches before finding the most suitable one for your specific use case.

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.114 Safari/537.36 Edg/103.0.1264.62

Browser/OS: Chrome 103 on Windows

View result in a separate tab

Test name	Executions per second
fomEntries	506.4 Ops/sec
reduce	1155.9 Ops/sec

Related benchmarks:

Test of 2 (version: 0)

test

Comparing performance of: fomEntries vs reduce

Created: 2 years ago by: Guest

Jump to the latest result

fomEntries

reduce

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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