@Sjord is this how you'd like it?

I see MIRI isn't able to be ran on the compile tests, we should probably add an exclusion for that. Also tarpaulin seems broken for some reason, maybe we need to update that pipeline stage

The cargo tarpaulin action seems to be quite outdated anyways:

• Node12 has been deprecated actions-rs/tarpaulin#21 (comment)
• Plan to deprecate this Action actions-rs/tarpaulin#6

So I want to switch to another system for coverage, but I'll give that its own PR.

Also enabled non-power-of-two alloc ringbuffers. The ability to have non-power-of-two alloc ringbuffers has to be enabled at compile time as benchmarks show that it can be 2-3 times slower than using ands. By default, alloc ringbuffers still use have the power of two requirement

As well as that, made the unchecked capacity version of the alloc ringbuffer unsafe. This is a breaking change. However, using it with a non-power-of-two capacity was literally undefined behavior, so I think we want this to be marked unsafe.

@Sjord is this how you'd like it?

Yes, this makes sense. My opinion shouldn't weigh too heavily though. I used this crate for Advent of Code day 6. The assignment was to find 4 consecutive different characters, and I used this ringbuffer for that. Then, part 2 of the assignment was to find 14 consecutive different characters, and then I ran into problems that only powers of two were supported. I think it makes sense to support any size, as long as users are aware of the performance consequences. But my use-case was artificial and one-off, so I don't want to steer the direction of this crate too much.

Also enabled non-power-of-two alloc ringbuffers. The ability to have non-power-of-two alloc ringbuffers has to be enabled at compile time as benchmarks show that it can be 2-3 times slower than using ands.

There are also crates that speed up the modulo by doing some calculations in advance, which can be useful to speed up alloced ringbuffers of arbitrary size:

• fastdiv - crates.io: Rust Package Registry
• strength_reduce - crates.io: Rust Package Registry
• fast-modulo - crates.io: Rust Package Registry

It's also possible to modify Alloc to use Box instead of Vec (thereby saving on a usize of storage), but I think that falls outside the scope of this PR. Perhaps something for later.

indeed outside of scope.

Would save two words even though