Benchmark: json stringify vs array tostring large obj random

Script Preparation code:

function moreData(arr, left) {
  if(left === 0) return arr;
  else {
    for (let i = 0; i < 50000; i++) {
      arr.push(Math.random());
    }
  	return moreData(arr, left - 1);
  }
}
function makeTestData() { return moreData([], 1); }

Tests:

toString
makeTestData().toString()
JSON.stringify
JSON.stringify(makeTestData());

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
toString
JSON.stringify

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON benchmark definition and test cases.

**Benchmark Definition:**

The benchmark is comparing two methods for converting an object to a string in JavaScript:

1. `JSON.stringify()`
2. `toString()`

**Script Preparation Code:**
```javascript
function moreData(arr, left) {
  if (left === 0) return arr;
  else {
    for (let i = 0; i < 50000; i++) {
      arr.push(Math.random());
    }
    return moreData(arr, left - 1);
  }
}

function makeTestData() { return moreData([], 1); }
```
This code creates a large array `makeTestData()` by recursively pushing random numbers onto the array. The purpose of this is to create a large, complex object that will be tested for string conversion.

**Html Preparation Code:**
There is no HTML preparation code provided, which means that the test cases are run in a headless browser (e.g., Chrome).

**Individual Test Cases:**

The benchmark defines two individual test cases:

1. `toString`: Tests the `toString()` method on the generated large object.
2. `JSON.stringify`: Tests the `JSON.stringify()` method on the generated large object.

**Libraries and Special Features:**

* The `JSON` library is used in the `JSON.stringify()` test case. This library provides a standardized way to convert JavaScript objects to JSON strings.
* There are no special features or syntaxes being tested, as both methods are standard JavaScript built-ins.

**Pros and Cons of Different Approaches:**

1. **`JSON.stringify()`**: Pros:
	* Widely supported across different browsers and platforms.
	* Can handle complex object structures, including nested arrays and objects.
	* Provides a way to customize the stringification process through options (e.g., `replacer`, `space`).
Cons:
	* Can be slower than `toString()` for very large objects due to the overhead of serializing the object graph.
	* May not work as expected with certain types of objects, such as functions or undefined values.
2. **`toString()`**: Pros:
	* Faster than `JSON.stringify()` for very large objects due to its simplicity and lack of overhead.
Cons:
	* May not provide a human-readable representation of the object, especially for complex structures.
	* Can be affected by the order in which properties are iterated over (i.e., property ordering may vary between browsers).

**Other Alternatives:**

1. **`Object.entries().map()`**: This method can be used to convert an object to a string, but it is not as widely supported as `JSON.stringify()`.
2. **`Array.prototype.map()` with `toString()`**: This method can also be used to convert an array to a string, but it has the same limitations as `toString()` for objects.
3. **Third-party libraries (e.g., `lodash.stringify()`)**: These libraries provide alternative ways to serialize JavaScript objects to strings.

In conclusion, the benchmark is testing two fundamental methods in JavaScript for converting objects to strings: `JSON.stringify()` and `toString()`. While both methods have their pros and cons, `JSON.stringify()` provides a more standardized and widely supported way to achieve this conversion.

Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser/OS: Chrome 121 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
toString	131.2 Ops/sec
JSON.stringify	146.0 Ops/sec

Related benchmarks:

json stringify vs array tostring large obj random (version: 0)

Comparing performance of: toString vs JSON.stringify

Created: 8 months ago by: Guest

Jump to the latest result

toString

JSON.stringify

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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