The boxing-arena
crate provides a very simply reuse of Box
allocation by
keeping a vector a reusable Box
allocations, that can be used when wanting to
wrap a value in Box
.
It would be sometimes easier to introduce boxing-arena
in code bases where
Box
is already used extensively than to use an arena crate that affects type
and life-time semantics more drastically.
Basic usage demonstration:
// Prepare an long-lived arena:
let mut ba = new;
// ... per allocation ... :
// In place of using `Box::new` directly, we do:
let boxed_big_value = ba.rebox;
// Instead of letting Rust drop and deallocate the Box, we do:
ba.unbox;