Benchmark: Js assign array - MeasureThat.net

Script Preparation code:

var CHUNK_SIZE = 500;
var list = [];
for (var i = 0; i < 1E6; i++) {
    list[i] = i;
}

Tests:

2
var CHUNK_SIZE = 500; var list = new Array(CHUNK_SIZE); for (var i = 0; i < 1E6; i++) { list[i] = i; }
tes2
var CHUNK_SIZE = 500; var list = []; for (var i = 0; i < 1E6; i++) { list[i] = i; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
2
tes2

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down the benchmark and its options.

**Benchmark Description**

The benchmark measures the performance of assigning elements to an array in JavaScript. The script preparation code creates an empty array `list` with a fixed size of 500,000, and then populates it with values from 0 to 1,000,000 using a for loop.

**Options Compared**

There are two options being compared:

1. **Using the `Array()` constructor**: This option uses the `Array()` constructor to create an array with a fixed size of 500,000. The script preparation code is:
```javascript
var CHUNK_SIZE = 500;
var list = new Array(CHUNK_SIZE);
for (var i = 0; i < 1E6; i++) {
    list[i] = i;
}
```
2. **Using the `[]` syntax**: This option uses the shorthand syntax to create an empty array and then pushes elements onto it using a for loop. The script preparation code is:
```javascript
var CHUNK_SIZE = 500;
var list = [];
for (var i = 0; i < 1E6; i++) {
    list[i] = i;
}
```
**Pros and Cons**

* **Using the `Array()` constructor**:
	+ Pros: This method is more explicit and concise, as it uses a single line of code to create an array with a fixed size.
	+ Cons: The `Array()` constructor may have performance overhead due to its complexity.
* **Using the `[]` syntax**:
	+ Pros: This method is more modern and widely adopted, as it's a shorthand syntax for creating empty arrays. It also allows for push operations in a loop.
	+ Cons: This method can be slightly slower than using the `Array()` constructor due to its dynamic nature.

**Other Considerations**

When choosing between these options, consider the trade-off between explicitness and performance. If you need more control over array creation, using the `Array()` constructor might be a better choice. However, if you prioritize conciseness and modern syntax, using the `[]` syntax could be a good option.

**Library Used**

None of the benchmark tests use any external libraries or dependencies.

**Special JS Features or Syntax**

There are no special JavaScript features or syntax used in this benchmark. The code uses basic JavaScript constructs like loops, arrays, and literals.

**Alternatives**

If you're interested in exploring alternative approaches, here are a few options:

1. **Using `TypedArray`**: Instead of using an array with a fixed size, consider using a `TypedArray` like `Uint8Array` or `Int32Array`, which can offer better performance for numerical computations.
2. **Parallelizing the test**: Consider parallelizing the benchmark to measure the overhead of executing multiple iterations concurrently. This can help identify potential bottlenecks in the test code.
3. **Using a different data structure**: Instead of using an array, consider using a more efficient data structure like a `Set` or a `Map`, which might offer better performance for certain use cases.

Keep in mind that these alternatives require additional setup and modifications to the benchmark code.

Related benchmarks:

Js assign array (version: 0)

asdasd

Comparing performance of: 2 vs tes2

Created: 4 years ago by: Guest

Jump to the latest result

2

tes2

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):