Benchmark: JSON.parse vs object literal

Tests:

JSON.parse
var a = JSON.parse("{}")
object literal
var b = {}

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
JSON.parse
object literal

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36

Browser/OS: Chrome 117 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
JSON.parse	8596112.0 Ops/sec
object literal	1041608064.0 Ops/sec

Autogenerated LLM Summary (model gemma2:9b, generated 2 months ago):

LLMs can make mistakes. Check important info.

This benchmark compares the performance of two ways to create an empty JavaScript object:

**Options:**

* **`JSON.parse("{}")`:**  This approach uses the built-in `JSON.parse()` method to parse a JSON string representing an empty object (`{}`). 
* **`{}` (Object literal):** This is the direct way to create an empty object in JavaScript using curly braces.

**Pros and Cons:**

* **`JSON.parse("{}")`:**
    * **Con:**  It involves parsing, which adds a layer of processing that's potentially slower than creating the object directly.
    * **Potentially Pro (Edge Cases):** If you are already working with JSON data in your application and need to create an empty object frequently, this approach might be slightly more efficient as it leverages the existing JSON parsing machinery. However, this is usually negligible.
* **`{}`:**
    * **Pro:**  This is a direct and concise way to create an empty object. It's generally the most performant option because it avoids the overhead of parsing.

**Considerations:**

In almost all practical scenarios, using `{}` (object literal) for creating an empty JavaScript object will be faster and more efficient. The `JSON.parse()` method is primarily designed for converting JSON strings into JavaScript objects, not as a shortcut for creating plain objects.

**Alternatives:**

There are no significant alternatives to these two methods for creating an empty JavaScript object.

Related benchmarks:

JSON.parse vs object literal (version: 0)

Comparing performance of: JSON.parse vs object literal

Created: one year ago by: Guest

Jump to the latest result

JSON.parse

object literal

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gemma2:9b, generated 2 months ago):