Benchmark: testte - MeasureThat.net

Script Preparation code:

var array = []; for (let i = 0; i< 1000000; i++) array.push(i);

Tests:

1
for(let i in array) {}
2
for(let i of array) {}
3
for(const i in array) {}
6
for(const i of array) {}
4
array.forEach(() => {});
5
for (let i =0; i<array.length; i++) {}

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
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Fastest: N/A

Slowest: N/A

Latest 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 JSON and explain what's being tested.

**Benchmark Definition**

The JSON defines a benchmark with the following properties:

* `Name`: The name of the benchmark, which is "testte".
* `Description`: An empty string, indicating no description for this benchmark.
* `Script Preparation Code`: A JavaScript snippet that prepares an array by pushing 1 million numbers onto it. This script will be executed before running each test case.
* `Html Preparation Code`: An empty string, indicating no HTML preparation code is needed.

**Individual Test Cases**

The JSON defines six test cases:

1. `for(let i in array) {}`
2. `for(let i of array) {}`
3. `for(const i in array) {}`
4. `for(const i of array) {}`
5. `array.forEach(() => {})`
6. `for (let i =0; i<array.length; i++) {}`

Each test case has a unique benchmark definition, and their purpose is to measure the performance of different JavaScript for loops.

**What's being tested?**

In essence, these test cases are measuring the performance differences between various JavaScript for loop constructs. The main variations are:

* Using `in` vs `of` with arrays
* Using `const` vs non-`const` variables in the loop
* Using `forEach()` vs traditional `for` loops

**Options compared**

The three main options being tested are:

1. **Traditional for loops**: Using a traditional `for` loop with an index variable (`i`) and an array length check.
2. **Array methods (in and of)**: Using the `in` operator to iterate over an array's properties, or the `of` method to create an iterator.
3. **forEach()**: Using the `forEach()` method on an array.

**Pros and Cons**

Here are some pros and cons for each option:

1. Traditional for loops:
	* Pros: Easy to understand, widely supported, and performant.
	* Cons: Can be slow for large datasets due to array lookups.
2. Array methods (in and of):
	* Pros: More concise, potentially faster than traditional for loops, and suitable for modern JavaScript.
	* Cons: May have performance issues if not properly optimized, and less intuitive for beginners.
3. forEach():
	* Pros: Concise, easy to read, and generally fast.
	* Cons: May not be as performant as traditional for loops or array methods.

**Library usage**

There is no library being used in these test cases.

**Special JS features**

None of the provided test cases use special JavaScript features like async/await, Promises, or WebAssembly. They focus on basic loop constructs.

**Alternatives**

If you're interested in alternative for loop options, consider:

1. **While loops**: Used for iterative calculations without array access.
2. **Recursive functions**: Used for recursive data structures and algorithms.
3. **Async/await**: Used for handling asynchronous code with synchronous-looking syntax.

Keep in mind that these alternatives may have different use cases and performance characteristics compared to traditional for loops, array methods, or forEach().

Related benchmarks:

testte (version: 0)

Comparing performance of: 1 vs 2 vs 3 vs 6 vs 4 vs 5

Created: 7 years ago by: Guest

Jump to the latest result

1

2

3

6

4

5

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):