Benchmark: jeffreytest-2 - MeasureThat.net

HTML Preparation code:

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

Script Preparation code:

window.foo = [{ name: 'cat', age: 1}, {name: 'dog', age: 2}, {name: 'bird', age: 3}];
window.bar = [{ name: 'cat', age: 1}, {name: 'dog', age: 2}, {name: 'bird', age: 3}];

Tests:

_.isEqual
_.isEqual(window.foo, window.bar)
Mine
function deepCheck(a, b) { Object.keys(a).every(key => { return a[key] === b[key]; }); } deepCheck(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
Mine
JSON.stringify

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.

**Overview of the Benchmark**

The provided JSON represents a JavaScript microbenchmark test case on MeasureThat.net. The benchmark tests three different approaches to compare two arrays, `window.foo` and `window.bar`, which contain objects with similar properties.

**Benchmark Definition**

The benchmark definition consists of three individual test cases:

1. **`.isEqual(window.foo, window.bar)`**: This test uses the Lodash library to check if the two arrays are equal using the `_.isEqual()` function.
2. **`function deepCheck(a, b) { ... }`**: This is a custom implementation that checks if two objects have identical properties by iterating over their keys and comparing values.
3. **`JSON.stringify(window.foo) === JSON.stringify(window.bar)`**: This test uses the `JSON.stringify()` method to convert both arrays to strings and then compares them for equality.

**Options Compared**

The three test cases compare different approaches to check array equality:

* **Lodash's `_.isEqual()` function**: This is a built-in utility function in Lodash that provides a deep comparison of two values.
* **Custom implementation using `every()` and property iteration**: This approach iterates over the properties of each object and compares their values using the `===` operator.
* **JSON stringification and comparison**: This method converts both arrays to strings using `JSON.stringify()` and then compares them for equality.

**Pros and Cons of Each Approach**

1. **Lodash's `_.isEqual()` function**:
	* Pros: Fast, reliable, and well-tested.
	* Cons: Adds external dependency (Lodash), may not work correctly for complex data structures.
2. **Custom implementation using `every()` and property iteration**:
	* Pros: No external dependencies, can be more efficient than Lodash's function.
	* Cons: Requires manual handling of edge cases, may be slower than Lodash's function due to unnecessary iterations.
3. **JSON stringification and comparison**:
	* Pros: Simple, easy to understand, and works for simple arrays.
	* Cons: May not work correctly for complex data structures or large arrays, as it loses the original object structure.

**Library Usage**

The benchmark uses Lodash's `_.isEqual()` function in one of its test cases. This is a third-party library that provides various utility functions, including deep comparisons.

**Special JS Features/Syntax**

None of the provided benchmarks utilize special JavaScript features or syntax that would require additional explanation.

**Alternative Approaches**

Other alternatives to compare array equality could include:

* Using `Array.prototype.every()` and property iteration with strict equality checks (`===`).
* Implementing a custom function using recursion or iterative approaches.
* Utilizing modern JavaScript features like `JSON.parse()` and `JSON.stringify()` for more efficient comparisons.

Keep in mind that the choice of approach depends on the specific use case, performance requirements, and personal preference.

Related benchmarks:

jeffreytest-2 (version: 0)

test

Comparing performance of: _.isEqual vs Mine vs JSON.stringify

Created: 6 years ago by: Guest

Jump to the latest result

_.isEqual

Mine

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):