Benchmark: jeffreytest-3 - 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, a: 1, b: 3, c: 4, d: 5, e: 6, f: 7, g: 8}, {name: 'dog', age: 2, a: 1, b: 3, c: 4, d: 5, e: 6, f: 7, g: 8}, {name: 'bird', age: 3, a: 1, b: 3, c: 4, d: 5, e: 6, f: 7, g: 8}];
window.bar = [{ name: 'cat', age: 1, a: 1, b: 3, c: 4, d: 5, e: 6, f: 7, g: 8}, {name: 'dog', age: 2, a: 1, b: 3, c: 4, d: 5, e: 6, f: 7, g: 8}, {name: 'bird', age: 3, a: 1, b: 3, c: 4, d: 5, e: 6, f: 7, g: 8}];

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.

I'd be happy to help explain the provided benchmark.

**What is tested on the provided JSON?**

The provided JSON represents three microbenchmarks that test different aspects of JavaScript's equality checking and serialization capabilities.

1. `_.isEqual(window.foo, window.bar)`: This benchmark tests whether two arrays (`window.foo` and `window.bar`) are equal. The `_` (underscore) prefix indicates that this is a function from the Lodash library, which provides functional programming utilities.
2. `function deepCheck(a, b) { Object.keys(a).every(key => { return a[key] === b[key]; }); } deepCheck(window.foo, window.bar);`: This benchmark tests whether two objects (`window.foo` and `window.bar`) are deeply equal by comparing each of their keys and values. Again, the `_` prefix indicates that this is a function from Lodash.
3. `JSON.stringify(window.foo) === JSON.stringify(window.bar);`: This benchmark tests whether two arrays (`window.foo` and `window.bar`) can be serialized to JSON strings and compared using the `===` operator.

**Options compared**

The options being compared are:

* Equality checking:
	+ Deep equality (using Lodash's `_isEqual` function)
	+ Shallow equality (using the `===` operator)
* Serialization:
	+ Serializing arrays to JSON strings and comparing them
* Implementation:
	+ Using Lodash for equality checking (`_.isEqual`)
	+ Implementing custom deep equality logic using JavaScript (`deepCheck` function)

**Pros and Cons**

Here are some pros and cons of each approach:

1. **Lodash's `_isEqual` function**
	+ Pros: Provides a robust implementation of deep equality, handles edge cases like cyclic references.
	+ Cons: Adds an external dependency (the Lodash library), may introduce performance overhead due to the extra function call.
2. **Custom `deepCheck` function**
	+ Pros: Allows for fine-grained control over the comparison logic, can be optimized for specific use cases.
	+ Cons: Requires implementing and maintaining custom logic, may be more error-prone than using a pre-existing library like Lodash.
3. **Serialization-based comparison**
	+ Pros: Can be simpler to implement than deep equality logic, doesn't require handling edge cases like cyclic references.
	+ Cons: May not handle complex data structures or non-serializable values (e.g., functions).

**Library and purpose**

Lodash is a JavaScript library that provides functional programming utilities. It's designed to help developers write more concise and expressive code.

**Special JS feature or syntax**

None of the benchmark definitions use any special JavaScript features or syntax beyond what's standard in JavaScript (ES6+).

**Other alternatives**

If you need to implement custom equality logic, you could consider using a library like `fast-deep-equal` which provides an efficient implementation of deep equality. Alternatively, if you're working with JSON serialization and don't require deep equality checks, you might use a library like `json-stringify-safe` which provides a safe way to serialize objects to JSON strings.

Keep in mind that these alternatives would depend on your specific use case and requirements.

Related benchmarks:

jeffreytest-3 (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):