AngelicosPhosphoros

Rebased and added some extra tests.

@bluss Can we merge that? It would fix complains of miri about retain. https://github.com/bluss/arrayvec/issues/221

@niklasf At this moment miri also don't like `ArrayVec::drain` and `ArrayVec::retain`. P.S. How about adding my code from issue as test to ensure that it remains valid?

The program above should be correct because: 1. It is guaranteed that retain predicate would invoked exactly once per element and in order from v[0] to v.last(). 2. Elements in...

Btw, I cloned your repo and this test fails as well: `cargo +nightly miri test test_retain`

You could just add benchmarks from there. https://github.com/rust-lang/rust/pull/83663#issuecomment-810595332

If I understood correctly, the all data getters of `Cookie

Thank you!

> if use RwLock it will be lock the runtime(may be lock stop all of async task) You can just run this code on special tokio threadpool for blocking code.

We already have some animations in ASCII (e.g., rain or snow animation), maybe we can just reuse that?