Benchmark: Lodash isEqual test -talves

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 = {
  destinations: [{ latitude: 37.7808649, longitude: -122.4125105 }],
  includeClassificationFilters: true,
  pickup: { latitude: 37.7705819, longitude: -122.4028714 },
  pickupTimeMsec: undefined,
  targetProductType: undefined,
};
window.bar1 = {
  destinations: [{ latitude: 37.7808649, longitude: -122.4125105 }],
  includeClassificationFilters: true,
  pickup: { latitude: 37.7705819, longitude: -122.4028714 },
  pickupTimeMsec: undefined,
  targetProductType: undefined,
};

Tests:

_.isEqual Level 1
_.isEqual(window.foo1, window.bar1)
JSON.stringify Level 1
JSON.stringify(window.foo1) === JSON.stringify(window.bar1);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

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

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

Measuring JavaScript performance is a complex task, and MeasuringThat.net provides a valuable service by allowing users to create and run microbenchmarks.

**What's being tested?**

The provided benchmark tests the performance of two different approaches for comparing two objects:

1. `_.isEqual(window.foo1, window.bar1)`: This uses Lodash's `isEqual` function to compare the two objects.
2. `JSON.stringify(window.foo1) === JSON.stringify(window.bar1)`: This uses the equality operator (`===`) on the stringified representations of the two objects.

**Options compared**

The benchmark compares two options:

* **Deep object comparison**: Using a dedicated library like Lodash's `isEqual` function to compare the objects.
* **String comparison**: Converting the objects to strings using `JSON.stringify` and comparing them directly.

**Pros and cons of each approach:**

1. **Deep object comparison (Lodash's `isEqual`)**
	* Pros:
		+ More accurate, as it checks for deep equality between objects.
		+ Can handle complex object structures with nested arrays or objects.
	* Cons:
		+ May be slower due to the additional overhead of a dedicated library function.
2. **String comparison (`JSON.stringify`)**

* Pros:
    - Fast and lightweight, as it only requires string concatenation.
  * Cons:
    - May not work correctly for all object structures (e.g., circular references).
    - Can lead to performance issues if the strings are very large.

**Lodash library**

The `isEqual` function from Lodash is a popular utility library that provides a convenient way to compare objects for deep equality. It's often used in JavaScript projects for its accuracy and simplicity.

**Special JS feature or syntax**

There doesn't appear to be any special JavaScript features or syntax being tested in this benchmark. The code only uses standard JavaScript constructs like objects, arrays, and string concatenation.

**Other alternatives**

If you want to compare object equality without using a dedicated library like Lodash's `isEqual`, you can implement your own comparison function. Here's an example:

```javascript
function isEqual(obj1, obj2) {
  if (typeof obj1 !== 'object' || typeof obj2 !== 'object') return false;
  const keys1 = Object.keys(obj1);
  const keys2 = Object.keys(obj2);

if (keys1.length !== keys2.length) return false;

for (const key of keys1) {
    if (obj1[key] !== obj2[key]) return false;
  }

return true;
}
```

This implementation uses `Object.keys` to get the object properties and then iterates over them to compare the values.

Keep in mind that implementing your own comparison function can be error-prone and may not cover all edge cases. Lodash's `isEqual` function is often a better choice for production code due to its accuracy and maintainability.

Related benchmarks:

Lodash isEqual test -talves (version: 0)

Test on isEqual performance

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

Created: 3 years ago by: Guest

Jump to the latest result

_.isEqual Level 1

JSON.stringify Level 1

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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