Struct CustomTuning 

pub struct CustomTuning<AL: Allocator + Clone = Global> { /* private fields */ }

Implementation of Tuning. Default branch is 64, default allocation unit is 16.

Implementations

impl<AL: Allocator + Clone> CustomTuning<AL>

pub fn new(branch: u16, alloc_unit: u16) -> Self

where AL: Default,

Construct with specified branch and allocation unit.

pub const fn new_in(branch: u16, alloc_unit: u16, alloc: AL) -> Self

Construct with specified branch, allocation unit and allocator.

The minimum branch is 6. A small branch is faster for insertion but slower for retrieval.

A small alloc_unit is slower for insertion but uses less memory.

pub const fn new_in_def(alloc: AL) -> Self

Construct with specified allocator and default branch and allocation unit (currently 64,16).

Trait Implementations

impl<AL: Allocator + Clone> Allocator for CustomTuning<AL>

fn allocate(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError>

Attempts to allocate a block of memory.

unsafe fn deallocate(&self, ptr: NonNull<u8>, layout: Layout)

Deallocates the memory referenced by ptr.

fn allocate_zeroed(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError>

Behaves like allocate, but also ensures that the returned memory is zero-initialized.

unsafe fn grow( &self, ptr: NonNull<u8>, old_layout: Layout, new_layout: Layout, ) -> Result<NonNull<[u8]>, AllocError>

Attempts to extend the memory block.

unsafe fn grow_zeroed( &self, ptr: NonNull<u8>, old_layout: Layout, new_layout: Layout, ) -> Result<NonNull<[u8]>, AllocError>

Behaves like grow, but also ensures that the new contents are set to zero before being returned.

unsafe fn shrink( &self, ptr: NonNull<u8>, old_layout: Layout, new_layout: Layout, ) -> Result<NonNull<[u8]>, AllocError>

Attempts to shrink the memory block.

fn by_ref(&self) -> &Self

where Self: Sized,

Creates a “by reference” adapter for this instance of Allocator.

impl<AL: Clone + Allocator + Clone> Clone for CustomTuning<AL>

fn clone(&self) -> CustomTuning<AL>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<AL: Debug + Allocator + Clone> Debug for CustomTuning<AL>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<AL: Allocator + Clone + Default> Default for CustomTuning<AL>

fn default() -> Self

Construct with default allocator and default branch and allocation unit (currently 64,16).

impl<AL: Allocator + Clone> Tuning for CustomTuning<AL>

fn full_action(&self, i: usize, len: usize) -> FullAction

Determine what to do when the size of an underlying BTree vector needs to be increased.

fn space_action(&self, (len, alloc): (usize, usize)) -> Option<usize>

Returns the new allocation if the allocation should be reduced based on the current length and allocation.

fn set_seq(&mut self, x: bool) -> bool

Set allocation mode to be optimal for sequential (ordered) inserts.