Benchmark: foofoo2023 - MeasureThat.net

Script Preparation code:


const element = {foo: 'bar'};

Tests:

not init
const arr = new Array(10000); for (let i =0; i < arr.length;i++){arr[i] = {foo: i}}
init
const arr = new Array(10000).fill({}); for (let i =0; i < arr.length;i++){arr[i] = {foo: i}}

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
not init
init

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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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 data and explain what's being tested.

**Benchmark Definition**
The benchmark is defined using a JSON object that contains the following properties:

* `Name`: The name of the benchmark, which in this case is "foofoo2023".
* `Description`: A brief description of the benchmark, but it doesn't seem to be relevant to the actual test.
* `Script Preparation Code` and `Html Preparation Code`: These two fields contain the code that is run before the actual benchmarking begins. The `Script Preparation Code` defines a constant `element` with a nested object `{ foo: 'bar' }`. However, it's not clear why this code is necessary or what it achieves.

**Individual Test Cases**
The benchmark consists of two test cases:

* "not init":
	+ Benchmark Definition: A loop that creates an array of 10,000 elements and assigns each element a nested object `{ foo: i }`, where `i` ranges from 0 to 9,999.
	+ Purpose: This test case measures the performance of initializing an array with nested objects using a traditional `for` loop.
* "init":
	+ Benchmark Definition: A similar loop as above, but this time using the `fill()` method to create the array and assign each element a nested object `{ foo: i }`.
	+ Purpose: This test case measures the performance of initializing an array with nested objects using the `fill()` method.

**Library Used**
In both test cases, the `Array.prototype.fill()` method is used to initialize the array. The `fill()` method was introduced in ECMAScript 2015 (ES6) and allows you to fill all elements of an array with a specified value.

**Special JS Feature/ Syntax**
Neither of the benchmark test cases uses any special JavaScript features or syntax, other than those mentioned above for the `Array.prototype.fill()` method.

**Pros and Cons**

* Traditional `for` loop:
	+ Pros: Can be useful when you need more control over the indexing process.
	+ Cons: More verbose and slower compared to `fill()`.
* `Array.prototype.fill()` method:
	+ Pros: Faster, more concise, and easier to read than traditional `for` loops.
	+ Cons: Requires a supported JavaScript engine (ES6+) and may not work in older browsers.

**Other Alternatives**
If you wanted to test other initialization methods for arrays with nested objects, here are some alternatives:

* Using `Array.prototype.map()`:
```javascript
arr = arr.map((_, i) => ({ foo: i }));
```
This method uses the `map()` function to apply a transformation to each element of the array. In this case, it returns an array with the same length as the original array, but with each element transformed into a nested object `{ foo: i }`.
* Using `Array.prototype.reduce()`:
```javascript
arr = arr.reduce((acc, _, i) => ({ ...acc, [i]: { foo: i } }), {});
```
This method uses the `reduce()` function to apply a reduction operation to each element of the array. In this case, it returns an object that accumulates the nested objects `{ foo: i }`, where `i` ranges from 0 to 9,999.

These alternatives would allow you to test different initialization methods for arrays with nested objects, but they may have different performance characteristics and use cases compared to the traditional `for` loop or `fill()` method.

Related benchmarks:

foofoo2023 (version: 0)

bar

Comparing performance of: not init vs init

Created: 2 years ago by: Guest

Jump to the latest result

not init

init

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):