// taken from speedy internals impls...
//
// It's not physically possible to have a valid slice
// which is bigger than 8 exabytes. No machine exists
// which could have this much RAM, and you can't even
// have this much virtual address space on any modern CPU.
//
// So in practice this should be totally harmless while
// it will allow the LLVM optimizer to better do its job.
//
// It actually *does* affect optimization in practice
// allowing LLVM to assume the length won't overflow
// in certain cases.
pub use unsafe_is_length;