Benchmark: for vs foreach vs some

Script Preparation code:

var array = new Array(100);

Tests:

for
for (var i in array) { array[i]; }
foreach
array.forEach(function(item, index) { return item; });
some
array.some(function(item, index) { return item === array[index]; });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
for
foreach
some

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided JSON data to understand what is being tested in this JavaScript microbenchmark.

**Benchmark Definition**

The benchmark compares the performance of three loop-related methods: `for`, `forEach`, and `some`. The purpose of the benchmark is to determine which method executes the most iterations per second (executions per second).

**Options Compared**

Here are the options being compared:

1. `for` loop: A traditional, manual looping approach that uses a variable (`i`) to iterate over an array.
2. `forEach` loop: An iterator-based approach that calls a callback function for each element in an array.
3. `some` loop: Another iterator-based approach that checks if any element in an array satisfies a condition.

**Pros and Cons of Each Approach**

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

1. **For Loop**
	* Pros:
		+ Well-known, widely supported, and easy to understand.
	* Cons:
		+ Manual indexing can lead to errors if not done correctly.
2. **ForEach Loop**
	* Pros:
		+ More concise and readable than a traditional `for` loop.
	* Cons:
		+ May incur overhead due to the iterator's methods (e.g., `next()`, `done()`).
3. **Some Loop**
	* Pros:
		+ Similar readability to `forEach`, with an additional optimization for early exits.
	* Cons:
		+ May be less well-known, depending on the target audience.

**Library Used**

None of the loops use a library explicitly mentioned in the provided JSON data. However, it's worth noting that both `forEach` and `some` loops rely on built-in JavaScript iterator methods, which are part of the ECMAScript standard.

**Special JS Feature/Syntax**

No special JavaScript features or syntax are used in this benchmark. All loops use standard JavaScript language constructs.

**Other Alternatives**

If you were to compare other loop-related methods, some alternatives could be:

1. `while` loop: A traditional looping approach using a conditional statement.
2. `map()`, `filter()`, and `reduce()` methods: Functional programming approaches that can be used for iteration and data processing.

However, these alternatives are not explicitly mentioned in the provided JSON data.

I hope this explanation helps software engineers understand the benchmark being tested on MeasureThat.net!

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:98.0) Gecko/20100101 Firefox/98.0

Browser/OS: Firefox 98 on Windows

View result in a separate tab

Test name	Executions per second
for	94038552.0 Ops/sec
foreach	7450488.5 Ops/sec
some	7756229.5 Ops/sec

Related benchmarks:

for vs foreach vs some (version: 0)

Compare loop performance

Comparing performance of: for vs foreach vs some

Created: 7 years ago by: Guest

Jump to the latest result

for

foreach

some

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):