rust-random / rust-random/rand
Add SmallThreadRng
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- Dominant language
- Rust
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- Merged PRs (30d)
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Description
Background
What is your motivation?
Same use case as ThreadRng serves today, but something that is faster than ThreadRng while sacrificing crystallographic security.
What type of application is this? (E.g. cryptography, game, numerical simulation)
Simple stuff like a randomized log sampler. Using rand::small_random() is much easier than
thread_local! {
static RNG: RefCell<SmallRng> = RefCell::new(SmallRng::from_rng(&mut rand::rng()));
}
fn should_emit() -> {
RNG.with_borrow_mut(|rng| rng.random_ratio(1, 1000)
}
Feature request
Create a type called SmallThreadRng that internally uses same rng as SmallRng.
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by locating the existing ThreadRng and SmallRng implementations and the rand::small_random() API. Trace how ThreadRng exposes its thread-local generator, then determine how SmallThreadRng should provide the same usage pattern while using SmallRng internally. Done means the new type is available and behaves as the requested faster, non-cryptographic thread-local generator.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- backend
- Issue type
- Feature
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 68/100