Benchmark: for of vs forEach with console log

Script Preparation code:

var arr = new Array(1000);

Tests:

for of
for(const a of arr) { console.log(a) }
forEach
arr.forEach(console.log)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
for of
forEach

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 provided JSON and explain what is tested, compared, pros and cons of different approaches, and other considerations.

**Benchmark Definition**

The benchmark definition provides information about the test case. In this case:

* The name of the benchmark is "for of vs forEach with console log".
* There is no description provided.
* The script preparation code is `var arr = new Array(1000);`, which creates an array of 1000 elements.
* There is no HTML preparation code.

**Individual Test Cases**

The benchmark has two individual test cases:

1. **"for of"`**
	* The benchmark definition is a JavaScript loop that uses the "for...of" syntax to iterate over the `arr` array, logging each element to the console.
2. **"forEach"`**
	* The benchmark definition is a JavaScript loop that uses the `Array.prototype.forEach()` method to iterate over the `arr` array, passing a callback function that logs each element to the console.

**What is tested?**

The benchmark tests the performance difference between using "for...of" and "forEach" loops in JavaScript. Specifically, it measures which loop provides better performance for logging elements to the console.

**Options compared**

* **For...of loop**: uses a specific syntax to iterate over arrays and objects.
	+ Pros:
		- More readable and concise syntax.
		- Less error-prone than traditional "for" loops.
	+ Cons:
		- Can be slower due to additional overhead for creating an iterator object.
* **forEach loop**: uses the `Array.prototype.forEach()` method to iterate over arrays.
	+ Pros:
		- Faster execution time compared to "for...of" loops.
		- Provides more flexibility and control over iteration logic.
	+ Cons:
		- Can be less readable due to callback functions.

**Other considerations**

* The benchmark assumes that the test environment is running on a desktop platform with Chrome 110 browser, which may not be representative of all possible environments.
* The use of `console.log` for logging elements might affect performance, as it can lead to unnecessary string formatting and concatenation.
* It's worth noting that both "for...of" and "forEach" loops are still relatively modern JavaScript features and might have varying levels of support across different browsers and platforms.

**Library/ Framework**

There is no explicit library or framework mentioned in the benchmark definition. However, the use of `Array.prototype.forEach()` suggests that this method is a part of the JavaScript standard library.

**Special JS feature/syntax**

The "for...of" loop uses a specific syntax to iterate over arrays and objects, which was introduced in ECMAScript 2015 (ES6). This syntax provides more concise and readable iteration logic compared to traditional "for" loops.

Related benchmarks:

for of vs forEach with console log (version: 0)

Comparing performance of: for of vs forEach

Created: 3 years ago by: Guest

Jump to the latest result

for of

forEach

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):