Just curious about it when I'm browsing around twir and find this PR: Add `Box<[T; N]>: TryFrom<Vec<T>>` by scottmcm · Pull Request #101837 · rust-lang/rust · GitHub
Box<[T]> stores continuous data on the heap with length fixed. So what's the advantage of using Box<[T; N]>. The latter is more limited in usage.
Compile time bounds checking / no or less run time bounds checking.
Box<[T]> takes up two usizes (ptr, len), Box<[T;N]> just needs one (ptr). Since the N is known at compile time it can help the compiler optimize. So the more limited one is potentially faster, and more memory efficient.
This topic was automatically closed 90 days after the last reply. We invite you to open a new topic if you have further questions or comments.