Struct AllocationDelta 

pub struct AllocationDelta {
    pub allocations: usize,
    pub deallocations: usize,
    pub reallocations: usize,
    pub bytes_allocated: usize,
    pub bytes_deallocated: usize,
}

Counts of allocator calls and the bytes they moved.

Every field is an exact tally of what the calling thread did, modulo usize::MAX + 1 (the counters wrap rather than panic, because a panic inside a global allocator aborts the process). A window that moves fewer than usize::MAX bytes reads exactly.

Default is the empty delta, the value a window that never touched the heap reads.

Fields

allocations: usize

Successful alloc and alloc_zeroed calls.

deallocations: usize

dealloc calls.

reallocations: usize

Successful realloc calls.

bytes_allocated: usize

Bytes acquired: the size of every successful allocation, plus the growth of every successful realloc to a larger size.

bytes_deallocated: usize

Bytes released: the size of every deallocated block, plus the shrinkage of every successful realloc to a smaller size.

Implementations

impl AllocationDelta

pub const fn bytes_retained(&self) -> isize

Net heap growth over the window: Self::bytes_allocated minus Self::bytes_deallocated, signed.

Positive when the window retained memory, negative when it released memory acquired before the window began, zero when it was balanced. Exact while the magnitude is below isize::MAX.

Trait Implementations

impl Clone for AllocationDelta

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for AllocationDelta

impl Debug for AllocationDelta

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

Formats the value using the given formatter.

impl Default for AllocationDelta

fn default() -> Self

Returns the “default value” for a type.

impl Eq for AllocationDelta

impl Hash for AllocationDelta

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for AllocationDelta

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for AllocationDelta