Benchmark: JSON.stringify object literals vs class

Tests:

JSON.stringify obj literals
let obj = { name: ['Bob', 'Smith'], age: 32, gender: 'male', interests: ['music', 'skiing'], bio: function () { console.log(this.name[0] + ' ' + this.name[1] + ' is ' + this.age + ' years old. He likes ' + this.interests[0] + ' and ' + this.interests[1] + '.'); }, greeting: function () { console.log('Hi! I\'m ' + this.name[0] + '.'); } }; for (let index = 0; index < 10000; index++) { JSON.stringify(obj); }
JSON.stringfy class instance
class Person { constructor(name, age, gender, interests) { this.name = name; this.age = age; this.gender = gender; this.interests = interests } bio () { console.log(this.name[0] + ' ' + this.name[1] + ' is ' + this.age + ' years old. He likes ' + this.interests[0] + ' and ' + this.interests[1] + '.'); } greeting () { console.log('Hi! I\'m ' + this.name[0] + '.'); } } for (let index = 0; index < 10000; index++) { JSON.stringify(new Person(['Bob', 'Smith'], 32, 'male', ['music', 'skiing'])); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
JSON.stringify obj literals
JSON.stringfy class instance

Fastest: N/A

Slowest: N/A

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

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**Benchmark Overview**

The provided JSON represents a benchmarking test case on MeasureThat.net, which compares the performance of two approaches: converting objects to strings using `JSON.stringify()` with object literals versus converting instances of a custom class (`Person`) to strings.

**What is tested?**

Two individual test cases are defined:

1. **`JSON.stringify obj literals`**: This test creates an object literal and repeats the process of calling `JSON.stringify()` on it 10,000 times.
2. **`JSON.stringify class instance`**: This test creates an instance of a custom class (`Person`) and repeats the process of calling `JSON.stringify()` on it 10,000 times.

**Comparison options**

The two approaches being compared are:

1. **Object literals**: Represented by the object literal `let obj = { ... }`.
2. **Custom class instances**: Represented by the custom class `class Person { ... }`.

**Pros and Cons of each approach:**

**Object literals:**

* Pros:
	+ Typically faster, as it doesn't involve creating a new instance.
	+ Less overhead due to the absence of class metadata.
* Cons:
	+ May lead to more memory allocation, as each object creation results in a new heap allocation.

**Custom class instances:**

* Pros:
	+ May be more efficient if the class has a lot of metadata (e.g., constructor arguments), which can be stored in the class's metatable.
	+ Can provide better control over serialization and deserialization processes.
* Cons:
	+ Involves creating a new instance, which may introduce additional overhead.
	+ Requires careful handling of constructor arguments and class metadata.

**Library:**

In both test cases, the `JSON.stringify()` function is used to convert objects to strings. The `JSON` object is part of the ECMAScript Standard Library, which provides methods for working with JSON data.

**Special JS feature or syntax:**

None mentioned in this specific benchmark, but it's worth noting that some browsers may have additional features or syntaxes related to class instances and serialization (e.g., WebAssembly).

**Other alternatives:**

If you wanted to explore alternative approaches, here are a few ideas:

1. **JSON.parse()` and `JSON.stringify()` with custom replacer functions**: You could use `JSON.parse()` and `JSON.stringify()` with custom replacer functions to manually control the serialization process.
2. **Utilizing a custom serialization library**: Consider using a dedicated serialization library like `js-yaml` or `json-stream` for more efficient and flexible serialization processes.

**Benchmark Preparation Code:**

The provided script preparation code is minimal, but it creates an object literal (`obj`) and repeats the process of calling `JSON.stringify()` on it. The custom class instance creation code uses a loop to create 10,000 instances of the `Person` class and calls `JSON.stringify()` on each one.

I hope this explanation helps!

Related benchmarks:

JSON.stringify object literals vs class (version: 0)

Comparing performance of: JSON.stringify obj literals vs JSON.stringfy class instance

Created: 7 years ago by: Guest

Jump to the latest result

JSON.stringify obj literals

JSON.stringfy class instance

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):