Benchmark: Object access method

Script Preparation code:

var languageCodes = {
	'en': true,
	'af': true,
	'sq': true,
	'am': true,
	'ar': true,
	'hy': true,
	'az': true,
	'bn': true,
	'bs': true,
	'bg': true,
	'ca': true,
	'zh': true,
	'zh-tw': true,
	'hr': true,
	'cs': true,
	'da': true,
	'fa-af': true,
	'nl': true,
	'et': true,
	'fa': true,
	'tl': true,
	'fi': true,
	'fr': true,
	'fr-ca': true,
	'ka': true,
	'de': true,
	'el': true,
	'gu': true,
	'ht': true,
	'ha': true,
	'he': true,
	'hi': true,
	'hu': true,
	'is': true,
	'id': true,
	'ga': true,
	'it': true,
	'ja': true,
	'kn': true,
	'kk': true,
	'ko': true,
	'lv': true,
	'lt': true,
	'mk': true,
	'ms': true,
	'ml': true,
	'mt': true,
	'mr': true,
	'mn': true,
	'no': true,
	'ps': true,
	'pl': true,
	'pt': true,
	'pt-pt': true,
	'pa': true,
	'ro': true,
	'ru': true,
	'sr': true,
	'si': true,
	'sk': true,
	'sl': true,
	'so': true,
	'es': true,
	'es-mx': true,
	'sw': true,
	'sv': true,
	'ta': true,
	'te': true,
	'th': true,
	'tr': true,
	'uk': true,
	'ur': true,
	'uz': true,
	'vi': true,
	'cy': true,
};

Tests:

Object.hasOwn()
Object.hasOwn(languageCodes, 'tr');
in
'tr' in languageCodes;
Object[property]
languageCodes['tr'];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object.hasOwn()
in
Object[property]

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_0_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.0 Mobile/15E148 Safari/604.1

Browser/OS: Mobile Safari 16 on iOS 16.0.2

View result in a separate tab

Test name	Executions per second
Object.hasOwn()	6332252.5 Ops/sec
in	17605394.0 Ops/sec
Object[property]	17900228.0 Ops/sec

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

LLMs can make mistakes. Check important info.

To explain what's being tested on the provided JSON, we need to break down the benchmark into its individual components.

The benchmark is testing three different object access methods: `in`, `Object[property]`, and `Object.hasOwn`.

**1. Object Access using "in" operator**

The first test case uses the `"in"` operator to check if a property exists in the `languageCodes` object:
```javascript
'tr' in languageCodes;
```
This operator returns a boolean value indicating whether the specified key (`"tr"`) is present in the object.

Pros: Simple, lightweight, and widely supported by browsers.
Cons: Can lead to slower performance if used with large objects or complex logic.

**2. Object Access using bracket notation**

The second test case uses bracket notation to access a property:
```javascript
languageCodes['tr'];
```
This syntax allows you to dynamically access properties of an object using a variable as the key.

Pros: More flexible and dynamic than the `in` operator, especially when working with user-input data.
Cons: Can lead to slower performance if not optimized correctly.

**3. Object Access using `Object.hasOwn()`**

The third test case uses the `Object.hasOwn()` method to check if an object has a property:
```javascript
Object.hasOwn(languageCodes, 'tr');
```
This method returns a boolean value indicating whether the specified key (`"tr"`) is present in the object.

Pros: More explicit and readable than the `in` operator or bracket notation.
Cons: Can lead to slower performance compared to the `in` operator or bracket notation.

In terms of performance, the order from fastest to slowest is:
1. Bracket notation (`languageCodes['tr']`)
2. `in` operator (`'tr' in languageCodes`)
3. `Object.hasOwn()` (`Object.hasOwn(languageCodes, 'tr')`)

Other considerations:

* The benchmark measures the number of executions per second for each test case.
* The results are based on data from Mobile Safari 16 on an iPhone running iOS 16.0.2.

As for libraries or special JavaScript features, none are mentioned in this specific benchmark.

If you're interested in exploring alternative approaches, here are a few options:

1. **Using `hasOwnProperty()`**: This method returns a boolean value indicating whether the specified key (`"tr"`) is present in the object and is an own property of that object.
2. **Using a custom function**: You could create a custom function to check for property existence, which might provide more control over performance or optimization.
3. **Using a library like Lodash**: This popular utility library provides a `has` function that can be used for property existence checks.

However, in this specific benchmark, the results are straightforward and based on simple syntax, making them easily comparable and interpretable.

Related benchmarks:

Object access method (version: 0)

Comparing performance of: Object.hasOwn() vs in vs Object[property]

Created: one year ago by: Guest

Jump to the latest result

Object.hasOwn()

in

Object[property]

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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