Benchmark: Underscore and Lodash: isEqual v3

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.0/underscore-min.js'></script>
<script type="text/javascript">
  window.underscore = _;
  _ = null;
</script>

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.10/lodash.min.js'></script>
<script type="text/javascript">
  window.lodash = _;
  _ = null;
</script>

Script Preparation code:

var obj1 = {
  0: {
    1: {
      key: 'one'
  	}
  }
};

var obj1copy = {
  0: {
    1: {
      key: 'one'
  	}
  }
};

var obj2 = {
  0: {
    1: {
      key: 'two'
  	}
  }
};

Tests:

Underscore equal
underscore.isEqual(obj1, obj1copy);
Lodash equal
lodash.isEqual(obj1, obj1copy);
Underscore none equal
underscore.isEqual(obj1, obj2);
Lodash none equal
lodash.isEqual(obj1, obj2);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Underscore equal
Lodash equal
Underscore none equal
Lodash none equal

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gemma2:9b, generated 29 days ago):

LLMs can make mistakes. Check important info.

This benchmark tests the performance of two popular JavaScript libraries, Underscore and Lodash, when comparing objects using their `isEqual` function.

**Options Compared:**

* **Underscore.isEqual(obj1, obj1copy);**: Compares two identical objects (`obj1` and `obj1copy`) to see how quickly Underscore determines they are equal.
* **Lodash.isEqual(obj1, obj1copy);**: Does the same comparison as above, but using Lodash's `isEqual` function.
* **Underscore.isEqual(obj1, obj2);**: Compares two different objects (`obj1` and `obj2`) to see how quickly Underscore identifies they are not equal.
* **Lodash.isEqual(obj1, obj2);**: Does the same comparison as above, but using Lodash's `isEqual` function.

**Pros/Cons:**

*  Both Underscore and Lodash are lightweight and efficient JavaScript libraries designed to simplify common tasks. Their `isEqual` function is optimized for quickly comparing objects and detecting differences.
* Choosing between them often comes down to personal preference, existing project dependencies, or the specific features offered by each library.

**Other Considerations:**

* **Object Complexity**:  The benchmark's simple objects make it a good starting point. Real-world comparisons might involve nested objects, arrays, functions, or other complex data structures, which could impact performance differences.
* **Environment**: Execution speed can vary depending on the browser, JavaScript engine, and overall system resources.

**Alternatives:**

While Underscore and Lodash are popular choices, there are other libraries or approaches for object comparison:

*  **Native JavaScript `Object.is()`**: This method provides strict equality checks for objects, potentially being more performant than library functions in some cases.
* **Manual Comparison**: For simple objects, you could write your own comparison logic using loops and conditional statements. However, this can be less efficient and error-prone than using established libraries.

Let me know if you have any further questions or would like to explore specific aspects of the benchmark results!

Latest run results:

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

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.1 Mobile/15E148 Safari/604.1

Browser/OS: Mobile Safari 16 on iOS 16.1

View result in a separate tab

Test name	Executions per second
Underscore equal	1688789.9 Ops/sec
Lodash equal	699372.3 Ops/sec
Underscore none equal	1537883.8 Ops/sec
Lodash none equal	667830.3 Ops/sec

Related benchmarks:

Underscore and Lodash: isEqual v3 (version: 0)

Comparing performance of: Underscore equal vs Lodash equal vs Underscore none equal vs Lodash none equal

Created: 6 years ago by: Guest

Jump to the latest result

Underscore equal

Lodash equal

Underscore none equal

Lodash none equal

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gemma2:9b, generated 29 days ago):