Benchmark: Lodash.isEqual vs JSON.stringify Equality Comparison for array of objects with nested properties and lots of records 222weqeqrq

HTML Preparation code:

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

Script Preparation code:

window.foo = [{accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'merp', ancestors: ['blah', 'merp']}, {accessPath: 'derp', ancestors: ['blah', 'derp']}];
window.bar = [{accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'derp.merp', ancestors: ['blah', 'blah']}, {accessPath: 'merp', ancestors: ['blah', 'merp']}, {accessPath: 'derp', ancestors: ['blah', 'changed']}];

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:

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested, along with the pros and cons of different approaches.

**Benchmark Overview**

The test compares two JavaScript functions: `lodash.isEqual` (a utility function from the Lodash library) and the built-in JavaScript comparison using `JSON.stringify`. The benchmark measures their performance in comparing two arrays of objects with nested properties (`window.foo` and `window.bar`).

**Options Compared**

1. **Lodash.isEqual**: This function is a custom implementation that compares two values for equality. It's designed to handle complex data structures, including nested objects and arrays.
2. **JSON.stringify Equality Comparison**: This approach uses the `JSON.stringify()` method to serialize both input arrays into strings and then compares these strings for equality.

**Pros and Cons**

1. **Lodash.isEqual**:
	* Pros:
		+ Specifically designed to handle complex data structures, making it a good choice for such benchmarks.
		+ Implemented in C++ for performance optimization (not shown in the benchmark code).
	* Cons:
		+ Requires Lodash library inclusion (as seen in the `Html Preparation Code` section), which may impact test execution time or require additional setup.
2. **JSON.stringify Equality Comparison**:
	* Pros:
		+ Built-in JavaScript function, eliminating the need for external libraries.
		+ Can be executed without any additional dependencies.
	* Cons:
		+ May not perform well with very large datasets due to string serialization overhead.

**Library and Special JS Feature Explanation**

In this benchmark:

1. **Lodash library**: Lodash is a utility library that provides various functions for tasks like array manipulation, object traversal, and equality checks (in this case, `lodash.isEqual`). It's widely used in JavaScript development.
2. No special JavaScript feature or syntax is used beyond the built-in `JSON.stringify()` method.

**Other Alternatives**

If not using Lodash, other alternatives for `lodash.isEqual` could include:

1. **Built-in equality checks**: While not as comprehensive as `lodash.isEqual`, built-in equality checks like `===` can be used.
2. **Custom implementation**: A custom function can be written to compare two values, similar to `lodash.isEqual`.
3. **Other libraries or frameworks**: Other libraries like Moment.js (for date comparisons) or Underscore.js (for utility functions) might offer alternative equality comparison implementations.

In the context of this benchmark, however, using Lodash provides a specific implementation designed for complex data structures, making it a suitable choice.

Related benchmarks:

Lodash.isEqual vs JSON.stringify Equality Comparison for array of objects with nested properties and lots of records 222weqeqrq (version: 0)

Test on isEqual performance

Comparing performance of: _.isEqual vs JSON.stringify

Created: 3 years ago by: Guest

Jump to the latest result

_.isEqual

JSON.stringify

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):