Benchmark: Fastest way to check if object is empty 2

Script Preparation code:

var xxx = { 
 "firstName":"John", 
 "LastName":"Plum",
 "occupation": "web Developer",
 "Hobbies": ["Reading", "Coding", "Basket Ball", "Football", "Movies", "Music"],
 "married" : true,
 "Age" : 29
}

Tests:

object.keys()
Object.keys(xxx) === 0
JSON.stringify()
JSON.stringify(xxx) === "{}"
Object.values()
Object.values(xxx) === 0

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
object.keys()
JSON.stringify()
Object.values()

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested, compared, and their pros and cons.

**Benchmark Overview**

The benchmark measures the performance of three different ways to check if an object is empty:

1. `Object.keys(xxx) === 0`
2. `JSON.stringify(xxx) === ""` (note: this will throw a TypeError in modern browsers, but it's still being tested)
3. `Object.values(xxx) === 0`

**What are we testing?**

We're testing the performance of these three methods on an object with different amounts of data.

The object `xxx` is defined as:
```javascript
var xxx = { ... }
```
It has a few properties:

* `firstName`: "John"
* `LastName`: "Plum"
* `occupation`: "web Developer"
* `Hobbies`: an array of 6 strings
* `married`: true
* `Age`: 29

The object is created using the provided script preparation code.

**Comparison**

The benchmark compares the performance of these three methods on the same object with different amounts of data:

* A small object with no properties (`Object.keys(xxx) === 0`)
* An object with a few properties (e.g., `firstName`, `LastName`, `married`) (`JSON.stringify(xxx) === ""` is not tested for this case, as it will throw a TypeError)
* An object with an array of many strings (`Hobbies`) (`Object.values(xxx) === 0`)

**Pros and Cons**

1. **Object.keys(xxx) === 0**
	* Pros: simple, straightforward way to check if an object is empty
	* Cons: may not be efficient for large objects, as it has to iterate over all properties
2. **JSON.stringify(xxx) === ""` (note: this will throw a TypeError in modern browsers)
	* Pros: can be used to check if an object is empty, but only works for simple objects
	* Cons: may not work correctly for more complex objects or arrays, and will throw an error in modern browsers
3. **Object.values(xxx) === 0**
	* Pros: efficient way to check if an array is empty, can be used to check if an object has no properties
	* Cons: requires the use of `Object.values()`, which may not be supported in older browsers

**Other Considerations**

In modern JavaScript, it's recommended to use the `Object.keys()` method with the `length` property to check if an object is empty:
```javascript
if (Object.keys(xxx).length === 0) {
    // object is empty
}
```
This approach is more efficient and reliable than using the `=== 0` comparison, which may not work correctly for all objects.

**Library and Special JS Features**

The benchmark uses the following library:

* None explicitly mentioned, but it's implied that the `JSON.stringify()` method is being tested against a specific implementation of JSON serialization.

There are no special JavaScript features or syntaxes being used in this benchmark.

Latest run results:

Run details: (Test run date: 7 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser/OS: Chrome 123 on Windows

View result in a separate tab

Test name	Executions per second
object.keys()	6631819.0 Ops/sec
JSON.stringify()	1809832.5 Ops/sec
Object.values()	6015957.5 Ops/sec

Related benchmarks:

Fastest way to check if object is empty 2 (version: 0)

You don't need to make add for loops in your test scenarios, the benchmark does it itself.

Comparing performance of: object.keys() vs JSON.stringify() vs Object.values()

Created: 7 months ago by: Guest

Jump to the latest result

object.keys()

JSON.stringify()

Object.values()

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):