Changelog

Version 0.7.0

The type of array created by @alloc and alloc! has been changed from a StrideArraysCore.PtrArray to UnsafeArrays.UnsafeArray. This shouldn't matter for most purposes, but can break code that relies on a specific return type.

Removed the package extension which was added in v0.5.1, because we plan on making Bumper.jl a direct dependancy of StaticTools.jl

Changed the default size heuristics for SlabBuffer, the default slab size is now 1 megabyte, and custom slabs are now created for allocations which are larger than half the slab size, rather than larger than the slab size.
Changed the default size heuristic for AllocBuffer. AllocBuffer() now creates a buffer of 1 megabyte capacity.

Added @alloc_ptr(n) which is like @alloc except it returns an n byte pointer directly instead of an array.

Added a package extension (only works on julia versions 1.9+) which lets the AllocBuffer work under StaticCompiler.jl, and defines methods like AllocBuffer(::Type{MallocVector}, n::Int) and free(AllocBuffer{<:MallocArray}) for convenience.

The default allocator is now something known as a slab allocator SlabBuffer. This comes with a very slight performance hit relative to AllocBuffer, but the advantage is that it scales very well from handling small allocations all the way up to handling very large allocations. It will only run out of memory when your computer runs out of memory, but it also won't hog memory that's not in use. It is also be much faster to construct than the old default AllocBuffer.
AllocBuffer still exists, but now defaults to 128kb of storage instead of 1/8th of your computer's physical memory. This allocator is very slightly faster than the slab allocator, but will error if it runs out of memory. It also is more flexible in the kinds of types it can wrap to use as underlying storage.
There is now an API for hooking user-defined allocators into the @no_escape and @alloc machinery.
alloc(::Type{T}, buffer, dims...) is now alloc!(buffer, ::Type{T}, dims...)
alloc_nothrow and @alloc_nothrow have been removed. People who need this can instead create custom no-throw buffer types.

alloc has been replaced with @alloc, a macro that can only be used inside of a @no_escape block, and always allocates memory from that specified block. alloc still exists, but it is not recommended, and has to be explicitly imported to use.