Benchmark: test 4bc5a6e8-e19c-46c7-8c39-c70b7152fe4f

Script Preparation code:

var date1 =  new Date(Date.parse('2018-11-07'));
window.obj1 = {a: [[], [1], ['1'], [null], {b: 1}, date1]}, {a: [[], [1], ['1'], [null], {b: 1}, date1]};
window.obj2 = {a: [[], [1], ['1'], [null], {b: 1}, date1]}, {a: [[], [1], ['1'], [null], {b: 1}, date1]};



function isFunction(functionToCheck) {
  var getType = {};
  return functionToCheck && getType.toString.call(functionToCheck) === '[object Function]';
}

function objectsAreEqual1(first, second) {
  return JSON.stringify(first) === JSON.stringify(second);
}

function objectsAreEqual2(first, second) {
  if (first === undefined)
    return second === undefined;

  if (first === null)
    return second === null;

  if (second === undefined)
    return first === undefined;

  if (second === null)
    return first === null;

  if (isFunction(first))
    return isFunction(second);

  else if (Array.isArray(first)) {
    if (!Array.isArray(second))
      return false;
    else if (first.length !== second.length)
      return false;

    for (let i = 0; i < first.length; i++) {
      if (!objectsAreEqual2(first[i], second[i]))
        return false;
    }
  }
  else if (first instanceof Date) {
    if (!(second instanceof Date))
      return false;

    return first === second;
  }
  else if (typeof first === 'string') {
    if (typeof second !== 'string')
      return false;
    return first === second;
  }
  else if (typeof first === 'number') {
    if (typeof second !== 'number')
      return false;
    return first === second;
  }

  if (Object.keys(first).length !== Object.keys(second).length)
    return false;

  for (let key in first) {
    if (!(key in second))
      return false;

    if (!objectsAreEqual2(first[key], second[key]))
      return false;
  }
  return true;
}

Tests:

json.stringify
objectsAreEqual1(obj1, obj2)
custom
objectsAreEqual2(obj1, obj2)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
json.stringify
custom

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark definition, options, and libraries used in the test cases.

**Benchmark Definition**

The benchmark tests two functions: `objectsAreEqual1` and `objectsAreEqual2`, which are used to compare the equality of objects.

* `objectsAreEqual1`: This function uses JSON.stringify() to compare the equality of two objects. It returns true if both objects are equal, and false otherwise.
* `objectsAreEqual2`: This function is a more complex implementation that compares the equality of two objects based on various conditions, such as:
	+ Checking if one or both of the objects are undefined or null
	+ Verifying if the objects are functions using the `isFunction` helper function
	+ Comparing arrays and their elements
	+ Comparing dates
	+ Comparing strings and numbers

**Options Compared**

The benchmark compares two options:

* `objectsAreEqual1`: Uses JSON.stringify() to compare object equality.
* `objectsAreEqual2`: A custom implementation that uses various conditions to compare object equality.

**Pros and Cons of Each Option**

* **JSON.stringify() (objectsAreEqual1)**:
	+ Pros: Simple, easy to implement, and widely supported by browsers.
	+ Cons: Can be slow for large objects due to the overhead of serializing and parsing JSON.
* **Custom implementation (objectsAreEqual2)**:
	+ Pros: Provides more control over comparison logic and can handle edge cases better.
	+ Cons: More complex and may lead to bugs if not implemented correctly.

**Library Usage**

The `isFunction` helper function is used in both test cases. It checks if a given object is a function using the `toString()` method and compares it with the string '[object Function]'.

**Special JS Features or Syntax**

None mentioned explicitly, but the use of `JSON.stringify()` suggests awareness of this feature.

**Other Considerations**

When testing object equality, it's essential to consider various scenarios, such as:

* Null or undefined values
* Array comparison (including nested arrays)
* Date and number comparisons
* Object property comparison

This benchmark tests how different approaches handle these cases and provides insights into the performance of each option.

**Alternative Approaches**

Other alternatives for comparing object equality might include:

* Using a library like Lodash's `isEqual` function, which provides a more comprehensive implementation.
* Implementing a custom comparison function using a more robust algorithm, such as a reference-based approach.
* Using a data structure like a hash table to store and compare objects.

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

Latest run results:

Run details: (Test run date: 6 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36

Browser/OS: Chrome 70 on Mac OS X 10.14.1

View result in a separate tab

Test name	Executions per second
json.stringify	192441.9 Ops/sec
custom	33833.0 Ops/sec

Related benchmarks:

test 4bc5a6e8-e19c-46c7-8c39-c70b7152fe4f (version: 0)

Comparing performance of: json.stringify vs custom

Created: 6 years ago by: Guest

Jump to the latest result

json.stringify

custom

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):