Benchmark: lodash isobject vs typeof vs toString

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var x = {'this': 'is', 'a': 'test', 'object': 52 }

Tests:

lodash
var y = _.isObject(x)
typeof
var y = (typeof(x) === 'object')
toString
var y = toString.call(x) === "[object Object]";

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash
typeof
toString

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/122.0.6261.62 Mobile/15E148 Safari/604.1

Browser/OS: Chrome Mobile iOS 122 on iOS 16.6

View result in a separate tab

Test name	Executions per second
lodash	11487659.0 Ops/sec
typeof	26687140.0 Ops/sec
toString	4164956.8 Ops/sec

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 JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Definition JSON**

The provided benchmark definition represents three test cases that compare the performance of different methods to check if an object is valid:

1. `lodash.isObject(x)`: Uses the `lodash` library, specifically its `isObject` function, to check if the object `x` is a valid JavaScript object.
2. `(typeof x === 'object')`: Checks if the type of `x` is `'object'` using the `typeof` operator.
3. `toString.call(x) === '[object Object]'`: Uses the `toString` method in combination with `call` to check if the string representation of `x` matches the expected result.

**Options Compared**

These three methods are being compared to determine which one is the fastest for checking object validity.

**Pros and Cons of Each Approach:**

1. **lodash.isObject(x)**:
	* Pros: Lodash provides a robust and reliable way to check if an object is valid, especially when dealing with complex objects.
	* Cons: Requires loading the entire Lodash library, which may add unnecessary overhead for small test cases.
2. **(typeof x === 'object')**:
	* Pros: Simple and lightweight, as it only relies on the `typeof` operator, which is a built-in JavaScript feature.
	* Cons: May not work correctly with all types of objects or in certain edge cases (e.g., objects created using `new Date()`).
3. **toString.call(x) === '[object Object]'**:
	* Pros: Provides a more direct and explicit way to check if an object is valid, as it uses the string representation of the object.
	* Cons: May be slower than the other two options due to the overhead of calling `toString` and comparing the result with a hardcoded string.

**Library Used: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for common tasks, such as checking types, manipulating arrays, and more. In this benchmark, the `isObject` function from Lodash is used to check if an object is valid.

**Special JS Feature or Syntax**

None of the tested methods rely on any special JavaScript features or syntax beyond what's already mentioned (e.g., `typeof`, `toString`).

**Other Alternatives**

If you're interested in exploring alternative methods for checking object validity, consider the following options:

1. Using a library like `is-plain-object` or `object-is` from npm, which provide lightweight implementations of similar functionality to Lodash's `isObject`.
2. Implementing your own custom function using `Object.prototype.toString.call(x)` and comparing the result with a hardcoded string.
3. Leveraging modern JavaScript features like `instanceof` or `class` syntax (if applicable) for object creation.

These alternatives may offer different trade-offs in terms of performance, readability, and maintainability, so it's essential to evaluate their suitability based on your specific use case and requirements.

Related benchmarks:

lodash isobject vs typeof vs toString (version: 0)

Comparing performance of: lodash vs typeof vs toString

Created: 2 years ago by: Guest

Jump to the latest result

lodash

typeof

toString

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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