Benchmark: lodash isobject vs typeof

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')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash
typeof

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser/OS: Chrome 128 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
lodash	9434971.0 Ops/sec
typeof	25616726.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and its test cases.

**Benchmark Description:**

The benchmark compares two approaches to check if an object is "deeply" equal to another object in JavaScript, using the `lodash` library.

**Options Compared:**

Two options are compared:

1. **Lodash `isObject` method**: This function checks if a value is an object with a non-empty own property set.
2. **`typeof` operator alone**: In this case, the author assumes that only objects passed as string arguments to `typeof` return `'object'`. However, there are several cases where `typeof` returns `'object'`, such as when taking the prototype of an object (`typeof Object.prototype === 'object'`) or using a context that has a global object with a property of the same type (e.g., in some Node.js environments).

**Pros and Cons:**

1. **Lodash `isObject` method**:
	* Pros:
		+ Highly optimized for performance.
		+ Handles more cases, such as checking if an object is a subclass of another object.
	* Cons:
		+ Requires importing the `lodash` library, which may add overhead to some benchmarks.
2. **`typeof` operator alone**:
	* Pros:
		+ Does not require any additional libraries or imports.
	* Cons:
		+ May return incorrect results in certain cases (e.g., when taking the prototype of an object).
		+ Less optimized for performance compared to the `lodash` approach.

**Other Considerations:**

When using `typeof`, it's essential to be aware of its limitations and potential edge cases. For example, if you need to check if a value is an instance of a specific constructor (e.g., `Array`, `Object`) or if you're working with legacy code that uses old browsers or environments, you might want to use the `lodash` approach for more reliability.

**Library:**

The benchmark uses the `lodash` library, which is a popular JavaScript utility library that provides a wide range of functions for tasks such as:

* String manipulation
* Array manipulation
* Object manipulation (including checking if an object is "deeply" equal to another)
* Functional programming utilities

In this specific benchmark, the `isObject` function from `lodash` is used to check if an object is deeply equal to another.

**JavaScript Features and Syntax:**

The benchmark does not use any special JavaScript features or syntax that are unique to a particular browser or environment. However, it's worth noting that some browsers may optimize certain aspects of JavaScript execution (e.g., `typeof` optimization) that could affect the results of this benchmark.

**Alternatives:**

If you need to compare similar benchmarks with other approaches or libraries, here are some alternatives:

* Use the `JSON.stringify()` method to create a string representation of an object and then compare it against another string.
* Implement your own recursive function to check if two objects are deeply equal.
* Use a different library that provides a similar function for checking deep equality, such as `lodash-es` (a subset of `lodash` optimized for modern browsers).
* Create a custom implementation using the `Object.prototype.hasOwnProperty.call()` method and recursion.

Keep in mind that these alternatives may have varying performance characteristics and edge cases compared to the original benchmark.

Related benchmarks:

lodash isobject vs typeof (version: 0)

Comparing performance of: lodash vs typeof

Created: 2 years ago by: Guest

Jump to the latest result

lodash

typeof

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):