Benchmark: loops performance mapping 2

Tests:

from
const array = Array.from({length: 1000}).map((_, i) => i * 2)
for
const array = [] for(let i = 0; i < 1000; i++){ array.push(i) } for(let i = 0; i < array.length; i++){ array[i] *= 2 }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
from
for

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 dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**What is tested?**

The provided JSON represents two individual test cases, each testing the performance of JavaScript arrays in different ways. The benchmarks are comparing the execution time of:

1. Using `Array.from()` to create an array.
2. Using a traditional `for` loop to populate an array.

These tests aim to evaluate which approach is more efficient for creating and manipulating arrays in JavaScript.

**Options compared**

The main difference between the two test cases lies in how the array is created and populated:

1. **Using `Array.from()`**: This method creates an array from a given iterable (in this case, an object with a length property). The iterator is used to generate the elements of the new array.
2. **Traditional `for` loop**: In this approach, a traditional `for` loop is used to populate the array with values.

**Pros and Cons**

Here's a brief overview of the pros and cons of each approach:

1. **Using `Array.from()`**:
	* Pros:
		+ Concise and expressive syntax.
		+ Works well for creating arrays from iterables.
		+ Can be faster in some cases due to optimized JavaScript engine implementations.
	* Cons:
		+ May have a higher overhead due to the creation of an intermediate iterator object.
		+ May not be suitable for large datasets or performance-critical applications.
2. **Traditional `for` loop**:
	* Pros:
		+ Low-level control and optimization opportunities.
		+ Suitable for large datasets or performance-critical applications.
		+ Can be easier to understand and maintain in some cases.
	* Cons:
		+ Verbose syntax can make the code harder to read.
		+ May require manual memory management (e.g., using `array.push()` instead of `array[i] = value`).

**Library usage**

In this case, no libraries are used.

**Special JS features/syntax**

There is no special JavaScript feature or syntax being tested. Both test cases use standard JavaScript syntax.

**Other alternatives**

To further evaluate the performance of array creation and manipulation methods in JavaScript, you could consider adding more test cases to MeasureThat.net, such as:

1. Using `Array.prototype.fill()` to populate an array.
2. Using `Array.prototype.splice()` to manipulate an existing array.
3. Comparing the performance of different JavaScript engines (e.g., V8 vs. SpiderMonkey) on various hardware platforms.

By expanding the test suite, you can gain a more comprehensive understanding of the performance characteristics of different array creation and manipulation methods in JavaScript.

Related benchmarks:

loops performance mapping 2 (version: 0)

Comparing performance of: from vs for

Created: 3 years ago by: Guest

Jump to the latest result

from

for

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):