Trait MallocSizeOf

pub trait MallocSizeOf {
    // Required method
    fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize;

    // Provided method
    fn constant_size() -> Option<usize>
       where Self: Sized { ... }
}

Trait for measuring the “deep” heap usage of a data structure. This is the most commonly-used of the traits.

Required Methods

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself. If T::size_of is a constant, consider implementing constant_size as well.

Provided Methods

fn constant_size() -> Option<usize>

where Self: Sized,

Used to optimize MallocSizeOf implementation for collections like Vec and HashMap to avoid iterating over them unnecessarily. The Self: Sized bound is for object safety.

Implementations on Foreign Types

impl MallocSizeOf for bool

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for char

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for f32

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for f64

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for i8

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for i16

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for i32

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for i64

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for i128

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for isize

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for str

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for u8

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for u16

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for u32

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for u64

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for u128

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for ()

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for usize

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for String

fn size_of(&self, _ops: &mut MallocSizeOfOps) -> usize

impl MallocSizeOf for Range<f32>

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for Range<f64>

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for Range<i8>

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for Range<i16>

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for Range<i32>

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for Range<i64>

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for Range<isize>

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for Range<u8>

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for Range<u16>

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for Range<u32>

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for Range<u64>

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for Range<usize>

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for AtomicBool

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for AtomicIsize

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for AtomicUsize

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for Duration

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for Instant

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for Bloom

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for H32

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for H64

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for H264

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for H520

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for U64

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for H128

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for H160

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for H256

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for H512

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for U128

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for U256

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for U512

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 1]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 2]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 3]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 4]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 5]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 6]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 7]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 8]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 9]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 10]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 11]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 12]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 13]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 14]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 15]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 16]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 17]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 18]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 19]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 20]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 21]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 22]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 23]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 24]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 25]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 26]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 27]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 28]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 29]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 30]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 31]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl MallocSizeOf for [u8; 32]

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<'a, B: ?Sized + ToOwned> MallocSizeOf for Cow<'a, B>

where B::Owned: MallocSizeOf,

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

impl<'a, T: ?Sized> MallocSizeOf for &'a T

fn size_of(&self, _ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<I: MallocSizeOf> MallocSizeOf for Reverse<I>

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<K, V> MallocSizeOf for BTreeMap<K, V>

where K: MallocSizeOf, V: MallocSizeOf,

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

impl<K, V, S> MallocSizeOf for HashMap<K, V, S>

where K: MallocSizeOf, V: MallocSizeOf,

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

impl<K, V, S> MallocSizeOf for HashMap<K, V, S>

where K: MallocSizeOf, V: MallocSizeOf,

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

impl<K, V, S> MallocSizeOf for LruCache<K, V, S>

where K: MallocSizeOf + Eq + Hash, V: MallocSizeOf, S: BuildHasher,

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

impl<T> MallocSizeOf for BTreeSet<T>

where T: MallocSizeOf,

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

impl<T> MallocSizeOf for PhantomData<T>

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<T> MallocSizeOf for SmallVec<[T; 32]>

where T: MallocSizeOf,

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

impl<T> MallocSizeOf for SmallVec<[T; 36]>

where T: MallocSizeOf,

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

impl<T, S> MallocSizeOf for HashSet<T, S>

where T: Eq + Hash + MallocSizeOf, S: BuildHasher,

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

impl<T: MallocSizeOf + Copy> MallocSizeOf for Cell<T>

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<T: MallocSizeOf + ?Sized> MallocSizeOf for Box<T>

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

impl<T: MallocSizeOf> MallocSizeOf for Option<T>

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<T: MallocSizeOf> MallocSizeOf for [T]

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

impl<T: MallocSizeOf> MallocSizeOf for VecDeque<T>

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

impl<T: MallocSizeOf> MallocSizeOf for Arc<T>

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

impl<T: MallocSizeOf> MallocSizeOf for Vec<T>

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

impl<T: MallocSizeOf> MallocSizeOf for RefCell<T>

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<T: MallocSizeOf> MallocSizeOf for Mutex<T>

If a mutex is stored directly as a member of a data type that is being measured, it is the unique owner of its contents and deserves to be measured.

If a mutex is stored inside of an Arc value as a member of a data type that is being measured, the Arc will not be automatically measured so there is no risk of overcounting the mutex’s contents.

The same reasoning applies to RwLock.

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

impl<T: MallocSizeOf> MallocSizeOf for RwLock<T>

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

impl<T: MallocSizeOf> MallocSizeOf for Mutex<T>

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

impl<T: MallocSizeOf> MallocSizeOf for RwLock<T>

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

impl<T: MallocSizeOf, E: MallocSizeOf> MallocSizeOf for Result<T, E>

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<TupleElement0: MallocSizeOf> MallocSizeOf for (TupleElement0,)

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1)

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2)

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf, TupleElement3: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2, TupleElement3)

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf, TupleElement3: MallocSizeOf, TupleElement4: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4)

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf, TupleElement3: MallocSizeOf, TupleElement4: MallocSizeOf, TupleElement5: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5)

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf, TupleElement3: MallocSizeOf, TupleElement4: MallocSizeOf, TupleElement5: MallocSizeOf, TupleElement6: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6)

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf, TupleElement3: MallocSizeOf, TupleElement4: MallocSizeOf, TupleElement5: MallocSizeOf, TupleElement6: MallocSizeOf, TupleElement7: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7)

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf, TupleElement3: MallocSizeOf, TupleElement4: MallocSizeOf, TupleElement5: MallocSizeOf, TupleElement6: MallocSizeOf, TupleElement7: MallocSizeOf, TupleElement8: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7, TupleElement8)

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf, TupleElement3: MallocSizeOf, TupleElement4: MallocSizeOf, TupleElement5: MallocSizeOf, TupleElement6: MallocSizeOf, TupleElement7: MallocSizeOf, TupleElement8: MallocSizeOf, TupleElement9: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7, TupleElement8, TupleElement9)

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf, TupleElement3: MallocSizeOf, TupleElement4: MallocSizeOf, TupleElement5: MallocSizeOf, TupleElement6: MallocSizeOf, TupleElement7: MallocSizeOf, TupleElement8: MallocSizeOf, TupleElement9: MallocSizeOf, TupleElement10: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7, TupleElement8, TupleElement9, TupleElement10)

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

impl<TupleElement0: MallocSizeOf, TupleElement1: MallocSizeOf, TupleElement2: MallocSizeOf, TupleElement3: MallocSizeOf, TupleElement4: MallocSizeOf, TupleElement5: MallocSizeOf, TupleElement6: MallocSizeOf, TupleElement7: MallocSizeOf, TupleElement8: MallocSizeOf, TupleElement9: MallocSizeOf, TupleElement10: MallocSizeOf, TupleElement11: MallocSizeOf> MallocSizeOf for (TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7, TupleElement8, TupleElement9, TupleElement10, TupleElement11)

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

fn constant_size() -> Option<usize>

Implementors