Benchmark: object deep compare

Script Preparation code:

var data = {
  a: 1,
  b: 2,
  c: 3,
  d: 4,
}

 function deepCompare(prevObj, nextObj) {
   let isDiff = false
   Object.keys(prevObj).every((key) => {
     if (prevObj[key] !== nextObj[key]) {
       isDiff = true
       return false
     } return true
   })
   return !isDiff
 }

Tests:

deepcompare
deepCompare(data, data)
stringify
JSON.stringify(data) === JSON.stringify(data)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
deepcompare
stringify

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.2 Safari/605.1.15

Browser/OS: Safari 15 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
deepcompare	4017148.0 Ops/sec
stringify	1568371.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the benchmark definition and its options.

**Benchmark Definition**

The provided JSON represents a JavaScript microbenchmark that measures the performance of two different approaches for comparing objects: `deepCompare` and `stringify`.

**Options Compared**

The two options being compared are:

1. **Deep Comparison (`deepCompare`)**: This approach uses a recursive function to compare the contents of two objects. It checks each property of the objects, including nested properties, to determine if they are equal.
2. **Stringification (`stringify`)**: This approach converts both objects to strings using `JSON.stringify()` and then compares the resulting strings.

**Pros and Cons**

* **Deep Comparison (`deepCompare`)**
	+ Pros:
		- It provides a more accurate comparison of object contents, including nested properties.
		- It's suitable for comparing complex data structures.
	+ Cons:
		- It can be slower than stringification due to the recursive nature of the comparison.
* **Stringification (`stringify`)**
	+ Pros:
		- It's generally faster than deep comparison since it only requires serializing the objects as strings.
	+ Cons:
		- It may not provide an accurate comparison, especially for complex data structures.

**Library and Purpose**

The `JSON.stringify()` function is a built-in JavaScript method that converts a value to a string representation. In this benchmark, it's used to compare two objects by converting them to strings and then comparing the resulting strings.

**Special JS Feature or Syntax**

There are no special JavaScript features or syntax mentioned in the benchmark definition. However, if you're interested in exploring other approaches, we can discuss some alternatives below.

**Alternatives**

Some alternative approaches for comparing objects include:

1. **Object.prototype.toString.call()**: This method converts an object to a string representation using its `toString()` method.
2. **JSON.parse(JSON.stringify(obj))**: This approach uses the `JSON.parse()` and `JSON.stringify()` methods to compare two objects by serializing them as strings and then parsing them back into objects.
3. **Lodash's `isEqual()` function**: This is a more comprehensive comparison library that can compare arrays, objects, and other data structures.

These alternatives might be worth exploring if you need more advanced object comparison features or better performance for specific use cases.

Related benchmarks:

object deep compare (version: 0)

Comparing performance of: deepcompare vs stringify

Created: 3 years ago by: Guest

Jump to the latest result

deepcompare

stringify

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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