Overview of the Benchmark

The MeasureThat.net website allows users to create and run JavaScript microbenchmarks, and this specific benchmark compares the performance of two common JavaScript functions: JSON.stringify and JSON.parse.

Tested Options

The test cases compare the execution time of:

1. JSON.parse(jsonString): This function takes a JSON string as input and parses it into a JavaScript object.
2. JSON.stringify(obj): This function takes an object or array as input and converts it to a JSON string.

Pros and Cons of Each Approach

• JSON.parse(jsonString):
  • Pros:
    • Faster execution time, especially for large JSON strings.
    • Simplifies the process of converting JSON data into JavaScript objects.
  • Cons:
    • More complex, as it requires parsing a JSON string.
    • May be slower for smaller JSON inputs due to overhead.
• JSON.stringify(obj):
  • Pros:
    • Simpler, as it only needs to serialize the input object.
    • Faster execution time for small or medium-sized objects.
  • Cons:
    • More complex, as it requires serializing an object into a JSON string.
    • May be slower for very large objects due to memory constraints.

Library Used

In this benchmark, no specific JavaScript library is used. However, JSON is a built-in JavaScript object that provides the necessary functions for working with JSON data.

Special JS Feature or Syntax

This benchmark does not use any special JavaScript features or syntax. It only relies on standard JavaScript functionality.

Alternative Approaches

If you were to write this benchmark from scratch, alternative approaches might include:

• Using a different serialization format (e.g., serialize.js or YAML) instead of JSON.
• Comparing the performance of different implementations of JSON.parse, such as using a library like json-stringify-safe.
• Adding additional test cases to cover more scenarios, such as handling errors or parsing non-standard JSON data.

Benchmark Preparation Code

The provided code creates an object obj with some properties and initializes two variables: jsonString (a JSON string representation of the object) and a new object with stringify and parse properties. The script preparation code is:

var obj = {
  description: 'Creates a deep copy of source, which should be an object or an array.',
  myNumber: 123456789,
  myBoolean: true,
  jayson: {
    stringify: 'JSON.stringify() method converts a JavaScript value to a JSON string....',
    parse: 'JSON.parse() method parses a JSON string...'.
  }
};

var jsonString = '{\"description\":\"Creates a deep copy of source, which should be an object or an array.\",\"myNumber\":123456789,\"myBoolean\":true,"' +
                '"jayson\":{\"stringify":"JSON.stringify() method converts a JavaScript value to a JSON string....","parse":"JSON.parse() method parses a JSON string..."}}';