Benchmark: Objekt je prázdný?

Script Preparation code:

xxx = {}

Tests:

===
Object.keys(xxx) === 0
==
Object.keys(xxx) == 0
Boolean
Boolean(Object.keys(xxx)[0])

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
===
==
Boolean

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark definitions and explain what's being tested, compared, and the pros and cons of different approaches.

**Benchmark Definition JSON**

The provided JSON represents a benchmark definition, which is a template for creating JavaScript microbenchmarks on the MeasureThat.net website. It contains the following information:

* `Name`: The name of the benchmark.
* `Description`: An optional description of the benchmark (not used in this case).
* `Script Preparation Code`: A code snippet that prepares the test environment, specifically setting up an empty object `xxx`.
* `Html Preparation Code`: Another optional code snippet for preparing HTML elements, which is not used in this case.

**Individual Test Cases**

There are three individual test cases:

1. **"Object.keys(xxx) === 0"`**
	* The benchmark definition checks whether the length of an empty object's keys is equal to zero.
	* This test compares:
		+ `===` (strict equality operator)
		+ `==` (loose equality operator)
	* Pros and Cons:
		+ Using `===` ensures that the comparison only considers primitive values, which can lead to false positives if the object's keys are non-primitive objects.
		+ Using `==` is more permissive but may result in slower performance due to potential type coercion.
2. **"Object.keys(xxx) == 0"`**
	* This test is identical to the previous one, but uses the loose equality operator `==`.
	* The pros and cons are similar to the first test case.
3. **"Boolean(Object.keys(xxx)[0])"`**
	* This test checks whether the boolean value of the first key of an empty object's keys array is true.
	* This test compares:
		+ The `Boolean` function, which converts a value to its boolean equivalent.
	* Pros and Cons:
		+ Using `Boolean()` explicitly ensures that the comparison only considers boolean values.
		+ Without using `Boolean()`, the comparison may result in false positives if the object's keys are non-boolean objects.

**Library: Object.keys()**

The `Object.keys()` method is used to get an array of a given object's own enumerable property names. In this case, it's used to check whether an empty object has any keys. The `Object.keys()` method returns an array containing the property names as strings.

**Special JS Feature/Syntax: None**

There are no special JavaScript features or syntax used in these test cases.

**Other Alternatives**

If you wanted to implement similar benchmarks, here are some alternative approaches:

* Instead of using `===` and `==`, you could use `Object.keys(xxx).length === 0` for strict equality.
* For the loose equality operator comparison, you could use a library like Lodash's `isEqual()` function or write your own implementation using JavaScript's built-in functions.
* If you want to test the boolean value of an object's keys array, you could use `Object.keys(xxx).length ? true : false`, but this is equivalent to using `Boolean(Object.keys(xxx)[0])`.

Keep in mind that these alternatives may not provide exactly the same results as the original benchmark cases, and some might be slower or more prone to errors.

Latest run results:

Run details: (Test run date: 10 months ago)

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Android

View result in a separate tab

Test name	Executions per second
===	2932660.8 Ops/sec
==	1835539.1 Ops/sec
Boolean	2029205.8 Ops/sec

Related benchmarks:

Objekt je prázdný? (version: 0)

Comparing performance of: === vs == vs Boolean

Created: 10 months ago by: Guest

Jump to the latest result

===

==

Boolean

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):