Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Math.random vs crypto.getRandomValues 32 bytes
(version: 0)
Fast and quick test
Comparing performance of:
Math.random vs crypto API
Created:
3 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
u8 = new Uint8Array(32)
Tests:
Math.random
for(let i=0;i<u8.length;++i) { u8[i] = Math.round(Math.random() * 0xff) }
crypto API
crypto.getRandomValues(u8)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
Math.random
crypto API
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
This benchmark does not have any results yet. Be the first one
to run it!
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Overview of the Benchmark** The provided JSON represents a JavaScript microbenchmarking test created on MeasureThat.net. The benchmark compares the performance of two approaches for generating random numbers: `Math.random` and the `crypto.getRandomValues` API. **Options Compared** The benchmark tests two options: 1. **Math.random**: This is a built-in JavaScript function that generates a random number between 0 (inclusive) and 1 (exclusive). The test case uses this function to generate 32 bytes of random data. 2. **crypto.getRandomValues**: This is a Web Cryptography API function that generates cryptographically secure random numbers. In the test case, it's used to fill a `Uint8Array` with 32 bytes of random data. **Pros and Cons of Each Approach** 1. **Math.random**: * Pros: Easy to use, widely supported, and simple implementation. * Cons: Not suitable for generating cryptographically secure random numbers. The generated numbers can be predictable and biased due to the underlying algorithm. 2. **crypto.getRandomValues**: * Pros: Provides cryptographically secure random numbers, suitable for applications requiring high randomness and security. * Cons: Requires the Web Cryptography API, which may not be supported by older browsers or devices. **Library Used** The `crypto` library is a built-in JavaScript library that provides cryptographic functions, including the `getRandomValues` method used in the test case. Its purpose is to generate cryptographically secure random numbers suitable for applications requiring high randomness and security. **Special JS Feature or Syntax (Not Applicable)** There are no special JavaScript features or syntaxes used in this benchmarking test. **Other Alternatives** If you need to generate non-cryptographically secure random numbers, you can use other approaches such as: 1. `Math.random()` with a seed value: You can provide a seed value to the `Math.random()` function to make it more predictable and controlled. 2. External libraries or modules: There are third-party libraries available that provide alternative methods for generating random numbers, such as `rand` or `random-js`. Keep in mind that these alternatives may not offer the same level of security as `crypto.getRandomValues`, so choose the approach according to your specific use case and requirements. **Benchmark Preparation Code** The provided script preparation code creates a `Uint8Array` with 32 bytes: ```javascript u8 = new Uint8Array(32); ``` This array will be used to store the generated random numbers.
Related benchmarks:
Math.random vs crypto.getRandom
repeated Math.random() vs crypto.getRandomValues()
Math.random vs crypto.getRandom Alberto
Math.floor(Math.random()) vs crypto.getRandom
Comments
Confirm delete:
Do you really want to delete benchmark?