Benchmark: JSON.stringify vs string concat

Script Preparation code:

var object = {
  str_key: 'this is "a \nstring',
  num_key: 42,
  bool_key: true,
  array_key: [1, 2, 3]
};

function escapeForJSON(string) {
  let result = "";
  const length = string.length;
  for (let i = 0; i !== length; ++i) {
    // Obviously missing a few other characters to escape
    if (string.charAt(i) == '"') {
      result += '\\"';
    } else {
      result += string.charAt(i);
    }
  }
  return result;
}

function stringConcat(obj) {
  let result = '{"str_key":"';
  result += escapeForJSON(obj.str_key);
  result += '","num_key":';
  result += obj.num_key.toString();
  result += ',"bool_key":';
  result += obj.bool_key.toString();
  result += ',"array_key":[';
  const length = obj.array_key.length;
  if (length > 0) {
    result += obj.array_key[0].toString();
  }
  for (let i = 1; i < length; ++i) {
    result += ',';
    result += obj.array_key[i].toString();
  }
  result += ']}';
  return result;
}

Tests:

JSON.stringify
JSON.stringify(object);
String concat
stringConcat(object);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
JSON.stringify
String concat

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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I'll break down the provided JSON benchmark and explain what's being tested, compared, and their pros and cons.

**Benchmark Definition**

The benchmark measures two approaches for serializing a JavaScript object to a string:

1. `JSON.stringify(object)`: This method is built-in in JavaScript and uses the `JSON` object to serialize an object to a string.
2. Custom implementation: `stringConcat(object)`, which manually escapes special characters and constructs the string.

**Options Compared**

* `JSON.stringify(object)` vs `stringConcat(object)`
* The two approaches have different serializations for objects with special characters, numbers, booleans, and arrays.

**Pros and Cons of Each Approach**

* **`JSON.stringify(object)`**:
	+ Pros:
		- Built-in method in JavaScript, so it's widely supported.
		- Can handle most special characters automatically (e.g., quotes, backslashes).
	+ Cons:
		- May not work correctly with non-standard data types or custom objects.
		- Can be slower for large objects due to the overhead of serializing and parsing.
* **`stringConcat(object)`**:
	+ Pros:
		- More control over the serialization process, allowing for customization.
		- Can handle complex data structures and special characters correctly.
	+ Cons:
		- Requires manual implementation, which can be error-prone and time-consuming.

**Library Used**

The `escapeForJSON` function is used in the custom implementation (`stringConcat(object)`). This function manually escapes special characters to ensure they are represented correctly in JSON. The purpose of this library is to provide a way to customize the serialization process for objects with special characters.

**Special JS Feature or Syntax**

There's no specific JavaScript feature or syntax being tested in this benchmark. However, it's worth noting that `JSON.stringify` uses ES5 features like `String.prototype.charAt()` and `Number.prototype.toString()`, which are widely supported.

**Other Alternatives**

If you need to serialize JavaScript objects to strings, other alternatives include:

* Using a library like `json-stringify-safe` or `json-storer`, which provide more control over the serialization process.
* Utilizing third-party libraries like `js-yaml` for YAML serialization.
* Implementing your own custom serializer using low-level JavaScript APIs like `Buffer` and `String.fromCharCode()`.

Keep in mind that each approach has its pros and cons, and the choice ultimately depends on the specific requirements of your use case.

Related benchmarks:

JSON.stringify vs string concat (version: 0)

Comparing performance of: JSON.stringify vs String concat

Created: 5 years ago by: Guest

Jump to the latest result

JSON.stringify

String concat

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):