Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
eval vs json parse
(version: 0)
Comparing performance of:
eval vs parse
Created:
8 years ago
by:
Guest
Jump to the latest result
Tests:
eval
eval('var crop = [1,2,3,4];');
parse
var crop = JSON.parse('[1,2,3,4]');
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
eval
parse
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
10 months ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36
Browser/OS:
Chrome 137 on Windows
View result in a separate tab
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=611907" width="100%" height="500px"></iframe>
Test name
Executions per second
eval
3815329.0 Ops/sec
parse
14847887.0 Ops/sec
Autogenerated LLM Summary
(model
llama3.1:latest
, generated one year ago):
Let's dive into the benchmark definition and results. **Benchmark Definition:** The benchmark is called "eval vs json parse" and it compares two different approaches to parsing JSON data in JavaScript. **Individual Test Cases:** There are two test cases: 1. **"eval"**: This test case uses the `eval()` function to execute a string containing a JSON array: `'var crop = [1,2,3,4];'`. The `eval()` function parses the string as JavaScript code and executes it. 2. **"parse"**: This test case uses the `JSON.parse()` method to parse a JSON array string: `"var crop = JSON.parse('[1,2,3,4]');"`. **Library:** No external library is used in this benchmark. **JavaScript Features/Syntax:** * The benchmark uses the `eval()` function, which is a built-in JavaScript function that executes a string as JavaScript code. * The test cases use the `JSON.parse()` method, which is a built-in JavaScript method for parsing JSON data. **What's Being Tested:** The benchmark compares the performance of two approaches to parsing JSON data: 1. **"eval()"**: Using the `eval()` function to execute a string containing a JSON array. 2. **"JSON.parse()"**: Using the `JSON.parse()` method to parse a JSON array string. **Pros and Cons:** * **"eval()"**: + Pros: Can be faster than parsing JSON data using `JSON.parse()`, since it avoids the overhead of creating a new `Array` object. + Cons: Can be less safe, as it executes arbitrary JavaScript code, which can lead to security vulnerabilities if not properly sanitized. * **"JSON.parse()"**: + Pros: Provides better safety and security, as it explicitly parses JSON data without executing arbitrary JavaScript code. + Cons: May be slower than using `eval()`, since it needs to create a new `Array` object. **Other Considerations:** When deciding which approach to use, consider the following factors: * **Security**: If you're dealing with user-supplied input or untrusted data, using `JSON.parse()` is generally safer. * **Performance**: If performance is critical and you can trust your data sources, using `eval()` might be faster. However, be cautious about potential security vulnerabilities. **Alternatives:** If you need to parse JSON data and are concerned about performance or safety, consider the following alternatives: * Use a dedicated JSON parsing library like **json5** or **fast-JSON-parse**, which can provide better performance and safety features. * Implement your own custom parser using a JavaScript library like **regex-parser**, which can offer more control over the parsing process. I hope this explanation helps you understand the benchmark definition and results!
Related benchmarks:
JSON.parse() vs. eval()
eval vs json parse (working)
json parse vs eval
json parse vs eval - version 2
eval vs json parse only
Comments
Confirm delete:
Do you really want to delete benchmark?