Benchmark: Lodash isEqual test bvg

HTML Preparation code:

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

Script Preparation code:

// 1 level deep
window.foo1 = { a: 1, b: 2, c: 1, d: 2, e: 1, f: 1, g: 2  };
window.bar1 = { a: 1, b: 2, c: 1, d: 2, e: 1, f: 1, g: 2  };

// 2 levels deep
window.foo2 = { a: 1, b: 2, c: { a: 1, b: 2, c: 1, d: 2  } };
window.bar2 = { a: 1, b: 2, c: { a: 1, b: 2, c: 1, d: 2  } };

// 3 levels deep
window.foo3 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } };
window.bar3 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 4 } } };

Tests:

_.isEqual Level 1
_.isEqual(window.foo1, window.bar1)
JSON.stringify Level 1
JSON.stringify(window.foo1) === JSON.stringify(window.bar1);
_.isEqual Level 2
_.isEqual(window.foo2, window.bar2)
JSON.stringify Level 2
JSON.stringify(window.foo2) === JSON.stringify(window.bar2);
_.isEqual Level 3
_.isEqual(window.foo3, window.bar3)
JSON.stringify Level 3
JSON.stringify(window.foo3) === JSON.stringify(window.bar3);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEqual Level 1
JSON.stringify Level 1
_.isEqual Level 2
JSON.stringify Level 2
_.isEqual Level 3
JSON.stringify Level 3

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/109.0.0.0 Safari/537.36

Browser/OS: Chrome 109 on Windows

View result in a separate tab

Test name	Executions per second
_.isEqual Level 1	646935.1 Ops/sec
JSON.stringify Level 1	597863.9 Ops/sec
_.isEqual Level 2	454990.7 Ops/sec
JSON.stringify Level 2	535313.6 Ops/sec
_.isEqual Level 3	341289.3 Ops/sec
JSON.stringify Level 3	468966.8 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 explanation of the provided benchmark.

**Benchmark Overview**

The benchmark measures the performance of two different approaches for comparing objects in JavaScript: using the `lodash` library's `isEqual` function and using the `JSON.stringify` method.

**Benchmark Test Cases**

There are four test cases:

1. **_.isEqual Level 1**: Compares two identical objects, `window.foo1` and `window.bar1`, using the `_lodash.isEqual` function.
2. **JSON.stringify Level 1**: Compares two identical objects, `window.foo1` and `window.bar1`, by converting them to JSON strings and comparing the resulting strings.
3. **_.isEqual Level 2**: Compares two nested objects with identical structure but different values, `window.foo2` and `window.bar2`, using the `_lodash.isEqual` function.
4. **JSON.stringify Level 2**: Compares two nested objects with identical structure but different values, `window.foo2` and `window.bar2`, by converting them to JSON strings and comparing the resulting strings.
5. **_.isEqual Level 3**: Compares two deeply nested objects with different structures, `window.foo3` and `window.bar3`, using the `_lodash.isEqual` function.
6. **JSON.stringify Level 3**: Compares two deeply nested objects with different structures, `window.foo3` and `window.bar3`, by converting them to JSON strings and comparing the resulting strings.

**Library: Lodash**

Lodash is a popular JavaScript library that provides various utility functions, including the `isEqual` function. The `isEqual` function recursively compares the properties of two objects, allowing for flexible comparison of nested structures.

In this benchmark, Lodash's `isEqual` function is used to compare identical and nested objects. This allows for a more nuanced comparison of object structures and values.

**Options Compared**

The two options compared in this benchmark are:

1. **_.lodash.isEqual**: Uses the `_lodash.isEqual` function to recursively compare objects.
2. **JSON.stringify**: Uses the `JSON.stringify` method to convert objects to JSON strings and compare them.

**Pros and Cons of Each Approach**

1. **_.lodash.isEqual**:
	* Pros:
		+ Can handle nested structures and values.
		+ Provides a more nuanced comparison of object properties.
	* Cons:
		+ May be slower due to the recursive nature of the comparison.
2. **JSON.stringify**:
	* Pros:
		+ Fast and efficient, as it relies on the built-in JSON serialization process.
	* Cons:
		+ Does not handle nested structures or values well, as it only compares the top-level properties.

**Other Considerations**

When choosing between these approaches, consider the trade-off between performance and accuracy. If you need to compare objects with complex structures or values, `_lodash.isEqual` may be a better choice. However, if speed is critical, `JSON.stringify` may be a more suitable option.

**Alternatives**

Other alternatives for comparing JavaScript objects include:

1. **== operator**: A simple comparison operator that checks for value equality.
2. **Object.keys() and Array.prototype.every()**: Can be used to compare object properties, but may not handle nested structures well.
3. **JSON.parse()` and `JSON.stringify()`: Similar to the approach used in this benchmark, but with a focus on parsing JSON strings.

In conclusion, this benchmark provides a useful comparison of two different approaches for comparing JavaScript objects: using Lodash's `isEqual` function versus using the `JSON.stringify` method. The choice of approach depends on your specific use case and priorities between performance and accuracy.

Related benchmarks:

Lodash isEqual test bvg (version: 0)

Test on isEqual performance

Comparing performance of: _.isEqual Level 1 vs JSON.stringify Level 1 vs _.isEqual Level 2 vs JSON.stringify Level 2 vs _.isEqual Level 3 vs JSON.stringify Level 3

Created: one year ago by: Guest

Jump to the latest result

_.isEqual Level 1

JSON.stringify Level 1

_.isEqual Level 2

JSON.stringify Level 2

_.isEqual Level 3

JSON.stringify Level 3

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):