Benchmark: json stringify vs array tostring large obj

Script Preparation code:

function moreData(arr, left) {
  if(left === 0) return arr;
  else {
    for (let i = 0; i < 50000; i++) {
      arr.push(Math.floor(Math.random()));
    }
  	return moreData(arr, left - 1);
  }
}
function makeTestData() { return moreData([], 1); }

Tests:

toString
makeTestData().toString()
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: 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
toString	154.1 Ops/sec
JSON.stringify	157.8 Ops/sec

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

LLMs can make mistakes. Check important info.

The provided JSON represents a JavaScript benchmark test case, specifically comparing the performance of two methods: `JSON.stringify()` and the default string conversion method (often referred to as "toString" or "native string conversion") for large objects.

**What is tested on the provided JSON?**

The benchmark tests two specific scenarios:

1. **`makeTestData().toString()`**: This test case measures the performance of converting a large object created using the `moreData()` function to a string using the default string conversion method.
2. **`JSON.stringify(makeTestData())`**: This test case measures the performance of converting the same large object to a JSON string using the `JSON.stringify()` method.

**Options compared:**

The benchmark compares two options:

1. **Native String Conversion (`toString()`)**: The default way to convert a JavaScript object to a string.
2. **JSON Stringification (`JSON.stringify()`)**: A method provided by the JavaScript standard library for converting JavaScript objects to JSON strings.

**Pros and Cons of each approach:**

**Native String Conversion (`toString()`):**

Pros:

* Typically faster, as it involves only converting property names and values to strings
* May be optimized for specific use cases

Cons:

* Can lead to unexpected results due to the way properties are converted (e.g., dates become string representations)
* May not handle all types of data correctly

**JSON Stringification (`JSON.stringify()`):**

Pros:

* Provides a more predictable and consistent result across different browsers
* Handles more types of data correctly, such as objects with nested arrays or functions

Cons:

* Typically slower than native string conversion due to the overhead of parsing and formatting the object data
* Can lead to larger JSON strings, which may affect performance in some cases

**Other considerations:**

* The `moreData()` function used to create large objects is likely intended to simulate a scenario where an object is being repeatedly cloned or serialized. In this case, both options are likely to perform similarly.
* The benchmark results will depend on the specific JavaScript engine and browser being tested.

**Library and syntax usage:**

In the provided test cases:

* No external libraries are used besides the standard JavaScript library for `JSON.stringify()`.
* No special JS features or syntax (e.g., ES6 classes, async/await) are used in this benchmark.

**Alternatives:**

If you need to compare performance between other string conversion methods or techniques, consider using a similar benchmark framework like MeasureThat.net. Some alternatives include:

* Creating a custom microbenchmark using a testing framework like Jest or Mocha
* Using a profiling tool or IDE plugin to measure execution times for specific code paths

Related benchmarks:

json stringify vs array tostring large obj (version: 0)

Comparing performance of: toString vs JSON.stringify

Created: 2 years ago by: Guest

Jump to the latest result

toString

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):