Benchmark: Test String() vs JSON.stringify()

Script Preparation code:

function makeTestData() { return 'parentId' }

Tests:

toString
String(makeTestData());
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

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36

Browser/OS: Chrome 111 on Windows

View result in a separate tab

Test name	Executions per second
toString	763569.6 Ops/sec
JSON.stringify	632876.1 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the explanation of the provided benchmark.

**What is being tested?**

The benchmark tests two different approaches to convert a JavaScript primitive value (`parentId`) to a string:

1. `String()`: This method uses the built-in String constructor to convert the value to a string. It takes ownership of the original value, which means it creates a new string object and copies the original value into it.
2. `JSON.stringify()`: This function converts an arbitrary JavaScript value to a JSON string. In this case, it's used to convert the `parentId` primitive value to a string.

**Options compared**

The benchmark compares the performance of these two approaches:

* `String()` (native method)
* `JSON.stringify()` (built-in function)

**Pros and Cons:**

* `String()`: Pros:
	+ Fast execution time, as it's a native method.
	+ Lightweight, as it doesn't create an additional object.
Cons:
	+ May not work correctly for non-primitive values or complex objects.
	+ May be less readable than using the built-in function.
* `JSON.stringify()`: Pros:
	+ Works with any JavaScript value, including complex objects.
	+ Can be more readable than using the native method.
Cons:
	+ Slower execution time compared to `String()`.
	+ Creates an additional object in memory.

**Library or special JS feature**

There is no specific library used in this benchmark. However, `JSON.stringify()` uses the `ToString` method on the value being converted, which is a built-in JavaScript method.

**Special JS features or syntax (not applicable)**

No special JavaScript features or syntax are used in this benchmark.

**Other alternatives**

Other alternatives to use when converting primitive values to strings include:

* Using template literals (`${value}`) or concatenation (`value + ''`)
* Using the `toJSON()` method (not applicable for primitives)
* Implementing a custom conversion function

Keep in mind that these alternatives might have different performance characteristics and usage scenarios compared to the built-in `String()` and `JSON.stringify()` methods.

**Benchmark preparation code**

The provided script preparation code defines a simple test data function `makeTestData()`, which returns the string `'parentId'`. This code is used to generate test data for each benchmark case.

Related benchmarks:

Test String() vs JSON.stringify() (version: 0)

Test String() vs JSON.stringify()

Comparing performance of: toString vs JSON.stringify

Created: one year 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 Summary (model llama3.2:3b, generated 2 months ago):