Benchmark: isEqu vs json - 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 = {a: false, b: '1', c: 3};
window.bar = {a: false, b: '1', c: 3};

Tests:

isEqu
_.isEqual(window.foo, window.bar)
json
JSON.stringify(window.foo) === JSON.stringify(window.bar);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
isEqu
json

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.

I'd be happy to explain the provided benchmark.

**What is tested?**

The provided benchmark measures the performance difference between two approaches: `_.isEqual` from the Lodash library and a simple string comparison using `JSON.stringify`. The test creates two objects, `window.foo` and `window.bar`, with identical properties but different types (number vs. string). It then checks if these two objects are equal using both methods.

**Options compared**

There are two options being compared:

1. **_.isEqual(window.foo, window.bar)**: This method uses the Lodash library to compare the two objects.
2. **JSON.stringify(window.foo) === JSON.stringify(window.bar)**: This is a simple string comparison where the `JSON.stringify` function converts both objects into strings and then compares them.

**Pros and Cons**

1. **_.isEqual(window.foo, window.bar)**:
	* Pros: Efficient and fast since it uses a specialized algorithm for comparing objects.
	* Cons: Requires loading an additional library (Lodash), which may add overhead to the benchmark.
2. **JSON.stringify(window.foo) === JSON.stringify(window.bar)**:
	* Pros: Lightweight and easy to implement, as it only relies on built-in JavaScript functions.
	* Cons: May be slower due to the overhead of converting objects to strings and comparing them.

**Library**

The Lodash library is a popular utility library for JavaScript that provides a wide range of functions for tasks such as string manipulation, array operations, and object comparison. In this benchmark, `_.isEqual` is used to compare two objects efficiently.

**Special JS feature or syntax**

There are no special JS features or syntax being tested in this benchmark. The focus is on comparing the performance of two different approaches to equality checking.

**Other alternatives**

If you wanted to implement a custom equality checker without relying on Lodash, you could use a simple recursive function that compares each property of the objects:

```javascript
function equal(a, b) {
  if (typeof a !== typeof b) return false;
  for (let key in a) {
    if (a[key] !== b[key]) return false;
  }
  return true;
}
```

Another approach could be to use the `Object.keys` method to compare the properties of the objects:

```javascript
function equal(a, b) {
  const keysA = Object.keys(a);
  const keysB = Object.keys(b);
  if (keysA.length !== keysB.length) return false;
  for (let i = 0; i < keysA.length; i++) {
    if (a[keysA[i]] !== b[keysB[i]]) return false;
  }
  return true;
}
```

Keep in mind that these custom implementations may not be as efficient or reliable as using a well-tested library like Lodash.

Related benchmarks:

isEqu vs json (version: 0)

Comparing performance of: isEqu vs json

Created: 5 years ago by: Guest

Jump to the latest result

isEqu

json

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):