Benchmark: JSON.stringify vs Naive deepEqual

Tests:

JSON.stringify
const data1 = { section: { id: 'test', }, block: { id: 'test', } } const data2 = { section: { id: 'testing', }, block: undefined } function isEqual(a, b) { return JSON.stringify(a) === JSON.stringify(b); } isEqual(data1, data2);
Naive deepEqual
const data1 = { section: { id: 'test', }, block: { id: 'test', } } const data2 = { section: { id: 'testing', }, block: undefined } function isEqual(a, b) { if (a != b) { return false; } if (a == b) { return true; } const hasDifferentProperties = Object.entries(a).some( ([key, value]) => { if (value == null && b[key] != null) { return true; } if (value != null && b[key] == null) { return true; } if (typeof value === 'Object') { return Object.entries(value).some(([k, v]) => v != b[key][k]); } return value != b[key]; }, ); } isEqual(data1, data2);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
JSON.stringify
Naive deepEqual

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: yesterday)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36

Browser/OS: Chrome 146 on Linux

View result in a separate tab

Test name	Executions per second
JSON.stringify	9561759.0 Ops/sec
Naive deepEqual	144004544.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks!

**Benchmark Definition**

The benchmark definition is a JSON object that provides metadata about the test case. In this case, it's empty, but we can infer some information from the individual test cases.

**Individual Test Cases**

There are two test cases:

1. **JSON.stringify**: This test case uses a custom implementation of `isEqual` function to compare two objects using `JSON.stringify`. The test creates two objects, `data1` and `data2`, which have similar properties but different values.
2. **Naive deepEqual**: This test case uses a naive implementation of equality comparison between two objects. It checks for shallow equalities (e.g., `a == b`) and then recursively checks for deeper equalities.

**Options Compared**

The two test cases are comparing the performance of:

* Using `JSON.stringify` to compare objects
* A custom implementation of `isEqual` function for deep object comparison

**Pros and Cons**

Here's a brief analysis of each approach:

* **JSON.stringify**: This approach has some pros:
	+ Easy to implement and understand.
	+ Can handle complex object structures.
	+ Provides a way to compare objects using a standardized format (JSON string).
However, it also has some cons:
	+ Inefficient for large objects due to the overhead of serializing and parsing JSON strings.
	+ May not work correctly for cyclic references or objects with non-serializable properties.
* **Naive deepEqual**: This approach has its own set of pros and cons:
	+ Can handle complex object structures more efficiently than `JSON.stringify`.
	+ More accurate than `JSON.stringify` for detecting subtle differences between objects.
However, it also has some drawbacks:
	+ More complex to implement and understand.
	+ May be slower than `JSON.stringify` due to the recursive nature of the implementation.

**Library**

There is no explicit library mentioned in the benchmark definition. However, the `isEqual` function in the **Naive deepEqual** test case uses a custom implementation that can be compared to existing libraries like Lodash's `deepEqual` or other custom implementations.

**Special JS Features/Syntax**

Neither of the test cases uses any special JavaScript features or syntax. They are relatively straightforward and focus on comparing object equality using different approaches.

**Alternatives**

If you're looking for alternatives to these benchmarked approaches, here are a few options:

* **Lodash's `deepEqual`**: A popular library that provides an efficient and accurate implementation of deep object comparison.
* **Immer.js's `isEqual` function**: Another widely-used library that offers a fast and reliable way to compare objects.
* **Manual implementations**: Depending on your specific use case, you might be able to implement a custom equality comparison function using techniques like recursive checking or diffing algorithms.

In summary, the benchmark is comparing two approaches for object equality comparison: `JSON.stringify` and a naive implementation of `isEqual`. The choice between these approaches depends on your specific requirements, performance constraints, and personal preference.

Related benchmarks:

JSON.stringify vs Naive deepEqual (version: 0)

Comparing performance of: JSON.stringify vs Naive deepEqual

Created: 4 years ago by: Guest

Jump to the latest result

JSON.stringify

Naive deepEqual

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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