Benchmark: Object Length vs Lodash Size

HTML Preparation code:

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

Script Preparation code:

var myObject = {};
for(i=0; i<10000; i++){
  myObject[`index${i}`] = i;
}

Tests:

Length
Object.keys(myObject).length
Lodash Size
_.size(myObject);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Length
Lodash Size

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

Browser/OS: Chrome 125 on Windows

View result in a separate tab

Test name	Executions per second
Length	1080.9 Ops/sec
Lodash Size	1078.8 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 provided benchmark and explain what's being tested, compared, and some pros and cons of each approach.

**Benchmark Overview**

The benchmark is designed to compare two approaches: using the built-in `Object.keys()` method in JavaScript to get the length of an object, versus using the Lodash library with its `_.size()` function. The benchmark measures how long it takes to execute these two functions on a large object (10000 properties) created dynamically.

**Script Preparation Code**

The script preparation code creates a new object `myObject` and populates it with 10000 properties, each named `index<#>`, where `<#>` is the index of the property. This object is then used as input for both benchmarking functions.

**Html Preparation Code**

The HTML preparation code includes a reference to the Lodash library (version 4.17.5) via a CDN link. This library provides the `_.size()` function that will be benchmarked against the built-in `Object.keys()` method.

**Individual Test Cases**

There are two test cases:

1. **Length**: This test case measures the execution time of using the built-in `Object.keys()` method to get the length of `myObject`.
2. **Lodash Size**: This test case measures the execution time of using Lodash's `_.size()` function to get the size of `myObject`.

**Pros and Cons of Each Approach**

1. **Built-in `Object.keys()` method**:
	* Pros: Lightweight, native JavaScript implementation, no external dependency.
	* Cons: May not be optimized for performance in all browsers or situations.
2. **Lodash's `_.size()` function**:
	* Pros: Provides a convenient and readable way to get the size of an object, with optimizations likely included in the library.
	* Cons: Adds an external dependency (the Lodash library), which may not be desirable for some use cases.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides various functions for tasks such as array manipulation, string formatting, and more. In this case, the `_.size()` function is used to get the size of an object. Lodash's implementation likely includes optimizations for performance, but it also introduces an external dependency.

**Special JS Feature/Syntax: None mentioned**

There are no special JavaScript features or syntaxes being tested in this benchmark. The focus is on comparing two different approaches to getting the length of an object.

**Alternatives**

If you wanted to create a similar benchmark using alternative methods, some options could include:

1. Using the `Object.getOwnPropertyNames()` method instead of `Object.keys()`.
2. Using a third-party library like Moment.js to calculate the size of an object.
3. Implementing your own custom function to get the length of an object.

However, keep in mind that these alternatives may not provide the same level of performance or convenience as using the built-in `Object.keys()` method or Lodash's `_.size()` function.

In conclusion, the provided benchmark is designed to compare two approaches to getting the length of an object: using the built-in `Object.keys()` method versus using Lodash's `_.size()` function. The benchmark provides a useful way to measure performance differences between these two methods and can help developers make informed decisions about which approach to use in their codebase.

Related benchmarks:

Object Length vs Lodash Size (version: 0)

Comparing performance of: Length vs Lodash Size

Created: 5 years ago by: Guest

Jump to the latest result

Length

Lodash Size

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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