Benchmark: Compare lodash isEmpty and length comparison on string arrays

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

// empty array
window.foo1 = [];

// array of strings
window.foo2 = ['a', 'b', 'c', 'd', 'e'];

Tests:

isEmpty empty array
_.isEmpty(window.foo1);
length empty array
(Array.isArray(window.foo1) && window.foo1.length === 0);
isEmpty array of strings
_.isEmpty(window.foo2);
length array of strings
(Array.isArray(window.foo2) && window.foo2.length === 0);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
isEmpty empty array
length empty array
isEmpty array of strings
length array of strings

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 months ago)

User agent: Mozilla/5.0 (Android 15; Mobile; rv:148.0) Gecko/148.0 Firefox/148.0

Browser/OS: Firefox Mobile 148 on Android

View result in a separate tab

isEmpty empty array

3.1M/s

isEmpty array of strings

3.0M/s

length empty array

2.3M/s

length array of strings

2.3M/s

View exact numbers

Test name	Executions per second
✓ isEmpty empty array	3,125,607 Ops/sec
isEmpty array of strings	3,014,258 Ops/sec
length empty array	2,302,426 Ops/sec
length array of strings	2,255,339 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 explain what's being tested.

**Overview**

The benchmark is designed to compare the performance of two approaches: using Lodash's `isEmpty` function and a simple length comparison. The test creates an empty array and a string array, and then measures how long it takes to check if each is empty or not using both methods.

**Lodash Library**

Lodash is a popular JavaScript utility library that provides a collection of high-order functions for functional programming tasks. In this benchmark, Lodash's `isEmpty` function is used to check if an object (in this case, an array) is empty.

The `isEmpty` function takes two arguments: the object to be checked and an optional value to compare with. However, in this benchmark, no value is provided, so it simply checks if the object is "truthy" or not. A truthy value is one that evaluates to true in a Boolean context, whereas a falsy value is one that evaluates to false.

**Options Compared**

The two options being compared are:

1. Using Lodash's `isEmpty` function: This approach uses the `_.isEmpty()` function to check if an array is empty.
2. Simple length comparison: This approach checks if the length of an array is 0 using the syntax `(Array.isArray(window.foo1) && window.foo1.length === 0)`.

**Pros and Cons**

* **Lodash's `isEmpty` function:**
	+ Pros:
		- Concise and expressive code
		- Less prone to errors due to its built-in implementation
	+ Cons:
		- May be slower than a simple length comparison, as it involves a function call and some additional logic
* **Simple length comparison:**
	+ Pros:
		- Generally faster, as it only involves a simple arithmetic operation
	+ Cons:
		- More verbose code, which can increase the chance of errors

**Other Considerations**

The benchmark also measures the performance of each approach on different types of arrays (empty and string). This helps to identify any potential differences in performance between these two approaches.

**Special JavaScript Features or Syntax**

In this benchmark, no special JavaScript features or syntax are used beyond what's standard for modern JavaScript. However, if we were to consider more advanced topics like async/await, Promises, or modern JavaScript features like `for...of` loops or arrow functions, that would require a different approach.

**Alternatives**

If you're interested in exploring other approaches or alternatives, here are a few options:

* Using a library like Fastify or Express.js to create a web server and benchmark the performance of each approach
* Writing a custom benchmarking framework using JavaScript's built-in `performance.now()` function or the `benchmark` library
* Experimenting with different data structures (e.g., maps, sets) or algorithms (e.g., sorting, searching) that might affect performance.

In summary, this benchmark compares two approaches to checking if an array is empty: using Lodash's `isEmpty` function and a simple length comparison. While both methods have their pros and cons, the simple length comparison approach generally wins out in terms of speed and conciseness.

Compare lodash isEmpty and length comparison on string arrays (version: 0)

Comparing performance of: `isEmpty empty array vs length empty array vs isEmpty array of strings vs length array of strings`

Created: 4 years ago by: Guest

Go to the latest result

isEmpty empty array

length empty array

isEmpty array of strings

length array of strings

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Compare lodash isEmpty and length comparison on string arrays (version: 0)

Comparing performance of: isEmpty empty array vs length empty array vs isEmpty array of strings vs length array of strings

Created: 4 years ago by: Guest

Go to the latest result

isEmpty empty array

length empty array

isEmpty array of strings

length array of strings

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

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Comparing performance of: `isEmpty empty array vs length empty array vs isEmpty array of strings vs length array of strings`