Benchmark: response.json() vs JSON.parse() todo

Tests:

response.json()
fetch('https://jsonplaceholder.typicode.com/todos/1').then(response => response.json()).then(data => console.log(data));
JSON.parse()
fetch('https://jsonplaceholder.typicode.com/todos/1').then(response => response.text()).then(data => console.log(JSON.parse(data)));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
response.json()
JSON.parse()

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Windows

View result in a separate tab

Test name	Executions per second
response.json()	10065.6 Ops/sec
JSON.parse()	9979.9 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**What is tested?**

The provided benchmark tests two different ways to parse JSON data in JavaScript: `response.json()` and `JSON.parse()`. The test cases use the `fetch` API to retrieve a JSON response from an external URL (`https://jsonplaceholder.typicode.com/todos/1`) and then parse the response as JSON.

**Options compared**

There are two options being compared:

1. **response.json()**: This method is built-in to the Fetch API in modern browsers. It returns a promise that resolves with the parsed JSON data.
2. **JSON.parse()**: This is a built-in JavaScript function that parses a string into a JSON object.

**Pros and Cons**

* `response.json()`:
	+ Pros: Built-in, efficient, and widely supported in modern browsers.
	+ Cons: Not available in older browsers, requires the Fetch API to be implemented.
* `JSON.parse()`:
	+ Pros: Widely supported in all browsers, doesn't require any external libraries or APIs.
	+ Cons: Requires an additional function call, which can lead to slower performance.

**Other considerations**

The choice between `response.json()` and `JSON.parse()` depends on the specific use case. If you're targeting modern browsers with the Fetch API implemented, `response.json()` is a good choice. However, if you need to support older browsers or want to avoid relying on the Fetch API, `JSON.parse()` might be a better option.

**Library**

There doesn't appear to be any external library used in this benchmark. The `fetch` API and built-in JavaScript functions like `JSON.parse()` are part of the standard browser implementation.

**Special JS feature or syntax**

No special features or syntax are being tested in this benchmark. It's a straightforward comparison of two common methods for parsing JSON data in JavaScript.

**Benchmark preparation code and definition json explanation**

The provided JSON defines a benchmark with two test cases:

* `Script Preparation Code`: empty, indicating that no script needs to be prepared before running the benchmark.
* `Html Preparation Code`: empty, indicating that no HTML page needs to be prepared before running the benchmark.
* `Name` and `Description`: provide metadata for the benchmark.

The individual test cases are defined in a separate array:

* The first test case uses `response.json()` to parse the JSON response from the external URL.
* The second test case uses `fetch` to retrieve the same JSON response, but then calls `JSON.parse()` to parse the response as JSON.

**Latest benchmark result explanation**

The latest benchmark results show the performance characteristics of each test case:

* The "response.json()" test case has an execution rate of approximately 10065.62890625 executions per second.
* The "JSON.parse()" test case has a slightly lower execution rate, around 9979.927734375 executions per second.

These results suggest that `response.json()` is faster than `JSON.parse()`. However, the actual performance difference may vary depending on specific use cases and browser implementations.

Related benchmarks:

response.json() vs JSON.parse() todo (version: 1)

Comparing performance of: response.json() vs JSON.parse()

Created: 2 years ago by: Registered User

Jump to the latest result

response.json()

JSON.parse()

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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