Benchmark: JSON.parse vs JSON.stringify

Tests:

JSON.parse
const obj = { "squadName": "Super hero squad", "homeTown": "Metro City", "formed": 2016, "secretBase": "Super tower", "active": true, "members": [{ "name": "Molecule Man", "age": 29, "secretIdentity": "Dan Jukes", "powers": [ "Radiation resistance", "Turning tiny", "Radiation blast" ] }, { "name": "Madame Uppercut", "age": 39, "secretIdentity": "Jane Wilson", "powers": [ "Million tonne punch", "Damage resistance", "Superhuman reflexes" ] }, { "name": "Eternal Flame", "age": 1000000, "secretIdentity": "Unknown", "powers": [ "Immortality", "Heat Immunity", "Inferno", "Teleportation", "Interdimensional travel" ] } ] } const objStringified = JSON.stringify(obj) JSON.parse(objStringified)
JSON.stringify
const obj = { "squadName": "Super hero squad", "homeTown": "Metro City", "formed": 2016, "secretBase": "Super tower", "active": true, "members": [{ "name": "Molecule Man", "age": 29, "secretIdentity": "Dan Jukes", "powers": [ "Radiation resistance", "Turning tiny", "Radiation blast" ] }, { "name": "Madame Uppercut", "age": 39, "secretIdentity": "Jane Wilson", "powers": [ "Million tonne punch", "Damage resistance", "Superhuman reflexes" ] }, { "name": "Eternal Flame", "age": 1000000, "secretIdentity": "Unknown", "powers": [ "Immortality", "Heat Immunity", "Inferno", "Teleportation", "Interdimensional travel" ] } ] } const objStringified = JSON.stringify(obj) JSON.stringify(obj)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
JSON.parse
JSON.stringify

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years 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
JSON.parse	576469.2 Ops/sec
JSON.stringify	674530.1 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down what's being tested in the provided JSON.

**Benchmark Definition:**
The benchmark compares the performance of `JSON.parse()` and `JSON.stringify()` functions in JavaScript.

**What are we comparing?**

We're comparing two options:

1. **`JSON.parse()`**: This function parses a JSON string into a JavaScript object.
2. **`JSON.stringify()`**: This function converts a JavaScript object into a JSON string.

**Pros and Cons:**

* `JSON.parse()`: Pros:
	+ Faster, as it only needs to parse the JSON string, not serialize an entire object tree.
	+ More efficient when dealing with complex objects or large datasets.
* `JSON.stringify()`: Pros:
	+ Can be used to convert any JavaScript object into a JSON string, making it useful for serialization and deserialization.
	+ Can be faster for simple objects or small datasets.

However, the main con of `JSON.parse()` is that it can throw errors if the input string is malformed. On the other hand, `JSON.stringify()` returns a string representation of the object, which might not preserve certain properties (like functions, dates, or regex objects).

**Library/Module:**
There isn't a specific library or module being used in this benchmark. The comparison is purely between the two built-in JavaScript methods.

**Special JS Feature/Syntax:**
The benchmark doesn't use any special JavaScript features or syntax beyond standard JSON and JavaScript object syntax.

**Other Alternatives:**

If you need to serialize and deserialize objects, you might consider using a library like `lodash` or `serde-js`, which provide more advanced serialization and deserialization options. For simple cases, you could also use the `JSON.stringify()` method directly on your JavaScript object.

Keep in mind that performance differences between these two methods will be most noticeable when dealing with large datasets or complex objects.

Related benchmarks:

JSON.parse vs JSON.stringify (version: 0)

Comparing performance of JSON.parse vs JSON.stringify

Comparing performance of: JSON.parse vs JSON.stringify

Created: 2 years ago by: Guest

Jump to the latest result

JSON.parse

JSON.stringify

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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