Benchmark: Lodash isEqual vs Every Undefined test

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>

Script Preparation code:

// 1 level deep
window.foo1 = { a: undefined, b: undefined, c: undefined, d: undefined };
window.bar1 = { a: undefined, b: undefined, c: undefined, d: undefined };

Tests:

_.isEqual
_.isEqual(window.foo1, window.bar1)
.every
Object.values(window.foo1).every(v => _.isNil(v))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEqual
.every

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser/OS: Chrome 133 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
_.isEqual	3218050.8 Ops/sec
.every	45017680.0 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 definition and test cases.

**Overview**

The provided JSON represents a JavaScript microbenchmarking test, specifically testing the performance of two functions: `lodash.isEqual` and `.every`. The test case creates two objects, `foo1` and `bar1`, both with undefined properties, and then uses these objects to measure the execution time of each function.

**Options Compared**

Two options are compared:

1. **_.isEqual(window.foo1, window.bar1)**: This function checks if two objects are equal using a deep equality comparison.
2. **Object.values(window.foo1).every(v => _.isNil(v))**: This function checks if all values in the `foo1` object are null or undefined.

**Pros and Cons**

Both options have their pros and cons:

* **_.isEqual**
	+ Pros: Can be used to check for deep equality between objects, can handle complex data structures.
	+ Cons: May be slower due to its more comprehensive comparison.
* **.every**
	+ Pros: Only checks for null or undefined values, may be faster due to its simpler logic.
	+ Cons: Does not perform a deep comparison, may not catch all differences between objects.

**Library and Its Purpose**

`lodash.isEqual` is a function from the Lodash library, which provides a set of useful functions for functional programming. In this test case, `_.isEqual` is used to compare two objects for equality.

**Special JS Feature or Syntax**

The test case uses the `_` prefix followed by the function name (e.g., `_isEqual`, `.every`). This is a common convention in Lodash to denote internal functions that are not intended for direct usage. However, in this specific benchmarking context, these functions are being used as-is.

**Other Alternatives**

If you were to rewrite or optimize these test cases, you might consider the following alternatives:

* Instead of using `_.isEqual`, you could use a more lightweight equality checking library like `fast-equal` or `eq`.
* For the `.every` function, you could also use a simple loop-based approach to check for null or undefined values.
* To further optimize performance, you might consider using techniques like parallel execution (running multiple iterations concurrently) or code inlining to reduce overhead.

Overall, this benchmarking test provides valuable insights into the relative performance of these two functions, allowing developers and maintainers of Lodash to make informed decisions about usage and optimization.

Related benchmarks:

Lodash isEqual vs Every Undefined test (version: 0)

Test on isEqual performance

Comparing performance of: _.isEqual vs .every

Created: 4 years ago by: Guest

Jump to the latest result

_.isEqual

.every

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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