Benchmark: for loop - MeasureThat.net

Script Preparation code:

var loopNum = 1000000

Tests:

for loop
for (var i = 0; i < loopNum; ++i) { // }
array loop
Array.from({length: loopNum}).forEach(() => {})

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
for loop
array loop

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):

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Let's break down the provided benchmark JSON and explain what's being tested.

**Benchmark Definition**

The benchmark definition is an object that contains metadata about the benchmark:

* `Name`: The name of the benchmark, which is "for loop".
* `Description`: An empty string, indicating that no description is provided for this benchmark.
* `Script Preparation Code`:
```javascript
var loopNum = 1000000;
```
This code initializes a variable `loopNum` with a value of 1,000,000. This value will be used in the benchmark to control the number of iterations.

**Html Preparation Code**

The `Html Preparation Code` is an empty string, indicating that no HTML preparation code is required for this benchmark.

**Individual Test Cases**

There are two individual test cases defined:

1. **"for loop"`**

This test case uses a traditional `for` loop with a variable `i`:
```javascript
for (var i = 0; i < loopNum; ++i) {
    // empty code block
}
```
The purpose of this test case is to measure the performance of a simple `for` loop.

2. **"array loop"`**

This test case uses the `Array.from()` method and `forEach()` function:
```javascript
Array.from({length: loopNum}).forEach(() => {});
```
The purpose of this test case is to measure the performance of an array-based loop.

**Comparison of Approaches**

The two test cases are designed to compare the performance of traditional `for` loops versus array-based loops. The pros and cons of these approaches are:

* **Traditional `for` loops**:
	+ Pros: Easy to understand and maintain, can be optimized for specific use cases.
	+ Cons: May have overhead due to variable management (e.g., declaring and incrementing a counter).
* **Array-based loops**:
	+ Pros: Can be more efficient than traditional `for` loops, especially when dealing with large arrays or dynamic data.
	+ Cons: May require additional memory allocation for the array, and can be less intuitive for some developers.

**Library Usage**

In this benchmark, the `Array.from()` method is used, which is a modern JavaScript API introduced in ECMAScript 2015 (ES6). The purpose of this library is to create a new array from an iterable object, which is then iterated over using the `forEach()` function. This approach can be more concise and expressive than traditional array indexing.

**Special JS Features**

In this benchmark, no special JavaScript features or syntax are used beyond the standard ECMAScript 2015 (ES6) APIs. The focus is on comparing the performance of two fundamental programming approaches.

**Other Alternatives**

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

* **BenchMarking.js**: A popular JavaScript benchmarking library that provides a simple and efficient way to write benchmarks.
* **JSPerf**: A website-based benchmarking tool for comparing the performance of different JavaScript code snippets.
* **Benchmark.js**: Another popular JavaScript benchmarking library that offers a more comprehensive set of features and options.

These alternatives may offer additional features, such as support for multiple platforms, parallel execution, or more advanced analysis tools. However, MeasureThat.net provides a simple and easy-to-use interface for creating and running benchmarks, which is particularly useful for quick explorations or comparisons.

Related benchmarks:

for loop (version: 0)

Comparing performance of: for loop vs array loop

Created: 7 years ago by: Registered User

Jump to the latest result

for loop

array loop

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):