Benchmark: eval vs json parse only, no var declaration (identical input)

Tests:

eval
eval('[1,2,3,4]');
parse
JSON.parse('[1,2,3,4]');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
eval
parse

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36

Browser/OS: Chrome 116 on Linux

View result in a separate tab

Test name	Executions per second
eval	6071359.0 Ops/sec
parse	4863939.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and explain what's being tested, compared, and analyzed.

**Benchmark Definition**

The benchmark is defined by two test cases:

1. `eval('[1,2,3,4]');`
2. `JSON.parse('[1,2,3,4]');`

These two test cases are comparing the performance of two different methods to parse a JSON string: the built-in `eval()` function and the `JSON.parse()` method.

**Options Compared**

The options being compared are:

* `eval()`: a JavaScript function that evaluates a string as a JavaScript expression.
* `JSON.parse()`: a built-in JavaScript function that parses a JSON string into a JavaScript object.

**Pros and Cons of Each Approach**

* **`eval()`**:
	+ Pros: simple to use, can be used for more complex expressions.
	+ Cons: security risks (e.g., code injection), performance overhead due to the need to parse the expression, and potential issues with certain data types.
* `JSON.parse()`: 
	+ Pros: safe and secure, efficient, and well-documented.
	+ Cons: requires a JSON string as input, which might be less readable or convenient than using `eval()`.

**Other Considerations**

Both `eval()` and `JSON.parse()` are designed to parse and evaluate expressions or objects. However, they serve different purposes:

* `eval()` is meant for executing arbitrary JavaScript code, while `JSON.parse()` is specifically designed for parsing JSON data.
* `eval()` can be vulnerable to security risks, whereas `JSON.parse()` is generally safer.

**Library and Purpose**

There is no explicit mention of a library in this benchmark. However, the use of `JSON` suggests that it's being used as a part of the JavaScript Standard Library, which provides built-in functions for working with JSON data.

**Special JS Feature or Syntax**

No special JS features or syntax are mentioned in this benchmark. The focus is on comparing two simple and well-known methods: `eval()` and `JSON.parse()`.

Related benchmarks:

eval vs json parse only, no var declaration (identical input) (version: 0)

Evaluates eval vs json parse only, without any declaration of a variable.

Comparing performance of: eval vs parse

Created: one year ago by: Guest

Jump to the latest result

eval

parse

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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