Benchmark: Lodash.isEqual vs JSON.stringify Equality Comparison for Shallow Object of Strings.

HTML Preparation code:

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

Script Preparation code:

window.foo = {a:'cat', b:'dog', c:'bird'};
window.bar = {a:'cat', b:'dog', c:'bird'};

Tests:

_.isEqual
_.isEqual(window.foo, window.bar)
JSON.stringify
JSON.stringify(window.foo) === JSON.stringify(window.bar);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEqual
JSON.stringify

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/118.0.0.0 Safari/537.36

Browser/OS: Chrome 118 on Windows

View result in a separate tab

Test name	Executions per second
_.isEqual	800267.9 Ops/sec
JSON.stringify	693607.6 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 compares the performance of two approaches: using Lodash's `isEqual` function versus manually comparing two objects using `JSON.stringify`.

**What is being compared?**

The test case "_.isEqual" measures how fast Lodash's `isEqual` function compares two shallow objects (`window.foo` and `window.bar`). The objects have string values for their properties.

On the other hand, the test case "JSON.stringify" checks how fast manually comparing the two objects using `JSON.stringify` returns equal results. This approach converts both objects to strings and then compares them using the `===` operator.

**Options compared**

1. **Lodash's isEqual function**: This approach uses a custom implementation to compare two objects recursively, considering their properties, types, and values.
2. **Manual comparison with JSON.stringify**: This approach manually converts both objects to strings using `JSON.stringify` and then compares the resulting strings using the `===` operator.

**Pros and Cons of each approach**

1. **Lodash's isEqual function**:
	* Pros: More efficient and accurate, especially for complex objects or deep comparisons.
	* Cons: Adds an external dependency (Lodash), which may slow down page load times.
2. **Manual comparison with JSON.stringify**:
	* Pros: No external dependencies, simple to implement.
	* Cons: Less efficient and less accurate than `isEqual`, as it only compares property values using `===`.

**Other considerations**

1. **Library usage**: The test uses Lodash's `isEqual` function, which is a popular utility library for JavaScript.
2. **JavaScript feature syntax**: None mentioned in the benchmark definition.

**Alternatives**

If you wanted to compare these approaches without using Lodash, you could:

* Use a custom implementation of `isEqual` using only built-in JavaScript methods and data structures (e.g., `Object.keys()`, `Array.prototype.every()`).
* Use a different library for comparing objects, such as `lodash-es` or `fast-json-stable-stringify-compare`.
* Implement the manual comparison approach without using `JSON.stringify`, e.g., by using a recursive function to compare property values.

Keep in mind that these alternatives may have different trade-offs in terms of performance, accuracy, and simplicity.

Related benchmarks:

Lodash.isEqual vs JSON.stringify Equality Comparison for Shallow Object of Strings. (version: 0)

Test on isEqual performance

Comparing performance of: _.isEqual vs JSON.stringify

Created: one year ago by: Guest

Jump to the latest result

_.isEqual

JSON.stringify

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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