Benchmark: test 1234 - MeasureThat.net

Script Preparation code:

  var obj = {
  'a': 1,
  'b': 1,
  'c': 1,
  'd': 1,
  'e': 1,
  'f': 1,
  'g': 1
};

Tests:

forEach
for (var i=10000; i > 0; i--) { Object.keys(obj).forEach(key => console.log(key)); }
Filter
for (var i=10000; i > 0; i--) { Object.keys(obj).filter(key => console.log(key)); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
forEach
Filter

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):

LLMs can make mistakes. Check important info.

Let's dive into the world of MeasureThat.net and analyze the provided benchmark.

**What is being tested?**

MeasureThat.net is testing the performance of JavaScript microbenchmarks, specifically the iteration over an object using two different methods:

1. `forEach`
2. `filter`

The benchmark involves creating a simple object with 8 properties and iterating over its keys using these two methods.

**Options compared:**

Two options are being compared:

1. `forEach`: This method iterates over the keys of an object using a callback function.
2. `filter`: This method creates a new array with all elements that pass a test implemented by a provided function.

**Pros and Cons:**

* **`forEach`**
	+ Pros:
		- Simpler to understand and implement, as it uses a built-in method.
		- Less memory usage compared to `filter`, as no intermediate array is created.
	+ Cons:
		- May not be as efficient for large datasets or performance-critical applications.
* **`filter`**
	+ Pros:
		- More flexible and reusable, as it can be used with arrays or other iterables.
		- Can be more efficient for large datasets, as it avoids the overhead of a callback function.
	+ Cons:
		- More complex to understand and implement, especially when dealing with nested conditions.
		- Creates an intermediate array, which may consume more memory.

**Library:**

The benchmark uses the built-in `Object.keys()` method to iterate over the object's keys. This is a part of the JavaScript standard library.

**Special JS feature or syntax:**

None mentioned in this specific benchmark. However, it's worth noting that MeasureThat.net might test other features like async/await, promises, or modern ES6+ features if added in the future.

**Other alternatives:**

If you were to implement a similar benchmark, you could consider using alternative methods like:

1. `for...in`: Iterates over an object's properties using a loop.
2. `Array.prototype.map()` and `Array.prototype.filter()`: These can be used with arrays or other iterables, but might not provide the same performance characteristics as native `forEach` and `filter`.
3. Closures: You could create a custom function to iterate over an object's keys using closures.

Keep in mind that each of these alternatives would have their own trade-offs in terms of performance, complexity, and memory usage.

I hope this explanation helps! Let me know if you have any further questions.

Related benchmarks:

test 1234 (version: 0)

Comparing performance of: forEach vs Filter

Created: 3 years ago by: Guest

Jump to the latest result

forEach

Filter

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):