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eval vs json parse 2
(version: 0)
eval vs json parse 2
Comparing performance of:
eval vs parse
Created:
5 years ago
by:
Guest
Go to the latest result
Tests:
eval
var crop = eval('[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
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Test case name
Result
eval
parse
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Mobile Safari/537.36
Browser/OS:
Chrome Mobile 125 on Android
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=524688" width="100%" height="500px"></iframe>
parse
1.3M/s
eval
1.0M/s
View exact numbers
Test name
Executions per second
✓
parse
1,267,105 Ops/sec
eval
1,000,324 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what's being tested. **What is being tested?** The website MeasureThat.net provides JavaScript microbenchmarks where users can create and run benchmarks to compare the performance of different approaches. The current benchmark compares two ways to parse a JSON string: 1. **eval()**: Evaluates a string as JavaScript code. 2. **JSON.parse()**: Parses a JSON string into a JavaScript object. **Options compared** The benchmark is comparing the execution speed of these two options on a sample JSON string: `[1,2,3,4]`. **Pros and Cons of each approach** **eval():** Pros: * Simple to implement in most programming languages * Can be used for more complex parsing tasks beyond just JSON Cons: * Can execute arbitrary code, making it vulnerable to security threats (e.g., Code Injection) * Performance is often slower due to the overhead of executing JavaScript code at runtime **JSON.parse():** Pros: * Specifically designed for parsing JSON data * Generally faster than eval() since it doesn't execute arbitrary code Cons: * Requires a separate import or declaration of the `JSON` object (in older browsers) * Can only parse JSON strings, not other types of data **Other considerations** When using eval(), it's essential to validate and sanitize any input data to prevent security breaches. On the other hand, JSON.parse() provides a safer and more controlled way to handle JSON data. The benchmark results show that **JSON.parse()** is generally faster than **eval()**, which is expected given their respective design purposes and performance characteristics. **Library usage** In this benchmark, neither `eval()` nor `JSON.parse()` relies on any external libraries. However, it's worth noting that in some browsers, the `JSON` object might be implemented using a library or module (e.g., in older versions of Chrome). No special JavaScript features or syntax are used in these benchmarks beyond standard ECMAScript 5 and later. **Alternatives** If you want to compare performance with other methods for parsing JSON data, some alternatives include: * Using a dedicated JSON parser library like `json-stringify-safe` (a popular choice among Node.js developers) * Implementing your own custom JSON parser using techniques like recursive descent parsing or LL(1) parsing * Leveraging the browser's built-in `atob()` and `JSON.parse()` functions for base64-encoded JSON strings Keep in mind that each approach has its trade-offs, and the choice ultimately depends on your specific use case, performance requirements, and personal preferences.
Related benchmarks
JSON.parse() vs. eval()
eval vs json parse (working)
eval vs json parse2
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