Benchmark: lodash isFunction vs native

HTML Preparation code:

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.core.js"></script>

Tests:

_lodash
_.isFunction(console.log); _.isFunction(setTimeout);
native
typeof console.log === "function" ? true : false typeof setTimeout === "function" ? true : false

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_lodash
native

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3.1 Safari/605.1.15

Browser/OS: Safari 18 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
_lodash	21262420.0 Ops/sec
native	312871232.0 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The benchmark is comparing two approaches:

1. **_.isFunction(console.log)**: This is using the `lodash` library to check if `console.log` is a function. Lodash is a popular JavaScript utility library that provides a wide range of functions for various tasks, including string manipulation, array manipulation, and more.
2. **typeof console.log === "function" ? true : false**: This is using the built-in `typeof` operator to check if `console.log` is a function.

**Options Compared**

The benchmark is comparing two options:

* Using Lodash's `isFunction()` function to check if a value is a function.
* Using the `typeof` operator to check if a value is a function.

**Pros and Cons of Each Approach**

1. **_.isFunction(console.log)**:
	* Pros: Lodash provides a more explicit way to check for functions, which can be beneficial in certain situations (e.g., debugging).
	* Cons: It introduces an external dependency on the `lodash` library, which may not be desirable for all use cases.
2. **typeof console.log === "function" ? true : false**:
	* Pros: This approach is lightweight and doesn't introduce any external dependencies.
	* Cons: It requires a more complex expression to check if a value is a function.

**Library and Purpose**

In this benchmark, the `lodash` library is used to provide a convenient way to check if a value is a function. Lodash's `isFunction()` function is specifically designed to check if a value is a function or not.

**Special JS Feature/ Syntax**

There are no special JavaScript features or syntax used in these test cases that would be unfamiliar to most software engineers.

**Other Alternatives**

If you wanted to implement this benchmark without using the `lodash` library, you could use the following alternative:

* Use a simple implementation of the `isFunction()` function: ```javascript
function isFunction(value) {
  return typeof value === 'function';
}
```

This implementation uses the same `typeof` operator as the second test case but encapsulates it in a reusable function.

Alternatively, if you wanted to use a more lightweight approach without using any external libraries, you could use:

* Using a polyfill for the `typeof` operator: ```javascript
var isFunction = function(value) {
  return typeof value === 'function';
};
```

However, this approach would still require some code duplication and may not be as efficient as the original benchmark.

Overall, the benchmark provides a useful comparison between two approaches to checking if a value is a function. By using Lodash's `isFunction()` function, developers can take advantage of a convenient and explicit way to perform this check. However, for lighter-weight use cases or those without external dependencies, using the `typeof` operator directly may be a more suitable option.

Related benchmarks:

lodash isFunction vs native (version: 0)

Comparing performance of: _lodash vs native

Created: 5 years ago by: Guest

Jump to the latest result

_lodash

native

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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