DataSize

Trait DataSize

pub trait DataSize {
    const IS_DYNAMIC: bool;
    const STATIC_HEAP_SIZE: usize;

    // Required method
    fn estimate_heap_size(&self) -> usize;

    // Provided method
    fn estimate_detailed_heap_size(&self) -> MemUsageNode { ... }
}

Expand description

Indicates that a type knows how to approximate its memory usage.

Required Associated Constants§

const IS_DYNAMIC: bool

If true, the type has a heap size that can vary at runtime, depending on the actual value.

const STATIC_HEAP_SIZE: usize

The amount of space a value of the type always occupies. If IS_DYNAMIC is false, this is the total amount of heap memory occupied by the value. Otherwise this is a lower bound.

Required Methods§

fn estimate_heap_size(&self) -> usize

Estimates the size of heap memory taken up by this value.

Does not include data on the stack, which is usually determined using mem::size_of.

Provided Methods§

fn estimate_detailed_heap_size(&self) -> MemUsageNode

Create a tree of memory estimations.

Similar to estimate_heap_size, but the returned value is a tree that typically reports memory used by structs individually.

Requires the detailed feature to be enabled.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types§

impl DataSize for IpAddr

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for SocketAddr

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for bool

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for char

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for f32

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for f64

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for i8

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for i16

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for i32

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for i64

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for i128

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for isize

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for u8

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for u16

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for u32

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for u64

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for u128

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for ()

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for usize

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for Box<str>

const IS_DYNAMIC: bool = true

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for String

const IS_DYNAMIC: bool = true

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for Ipv4Addr

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for Ipv6Addr

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for SocketAddrV4

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for SocketAddrV6

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for Duration

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for OsString

const IS_DYNAMIC: bool = true

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for PathBuf

const IS_DYNAMIC: bool = true

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for Instant

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for SystemTime

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl DataSize for FakeClock

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<'a, T> DataSize for Cow<'a, T>
where T: 'a + ToOwned + ?Sized, <T as ToOwned>::Owned: DataSize,

const IS_DYNAMIC: bool = true

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<A> DataSize for SmallVec<A>
where A: Array, A::Item: DataSize,

const IS_DYNAMIC: bool = true

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<K, V> DataSize for BTreeMap<K, V>
where K: DataSize, V: DataSize,

const IS_DYNAMIC: bool = true

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<K, V, S> DataSize for HashMap<K, V, S>
where K: DataSize, V: DataSize,

const IS_DYNAMIC: bool = true

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<T0> DataSize for (T0,)
where T0: DataSize,

const IS_DYNAMIC: bool = T0::IS_DYNAMIC

const STATIC_HEAP_SIZE: usize = T0::STATIC_HEAP_SIZE

fn estimate_heap_size(&self) -> usize

impl<T0, T1> DataSize for (T0, T1)
where T0: DataSize, T1: DataSize,

const IS_DYNAMIC: bool

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T0, T1, T2> DataSize for (T0, T1, T2)
where T0: DataSize, T1: DataSize, T2: DataSize,

const IS_DYNAMIC: bool

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T0, T1, T2, T3> DataSize for (T0, T1, T2, T3)
where T0: DataSize, T1: DataSize, T2: DataSize, T3: DataSize,

const IS_DYNAMIC: bool

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T0, T1, T2, T3, T4> DataSize for (T0, T1, T2, T3, T4)
where T0: DataSize, T1: DataSize, T2: DataSize, T3: DataSize, T4: DataSize,

const IS_DYNAMIC: bool

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T0, T1, T2, T3, T4, T5> DataSize for (T0, T1, T2, T3, T4, T5)
where T0: DataSize, T1: DataSize, T2: DataSize, T3: DataSize, T4: DataSize, T5: DataSize,

const IS_DYNAMIC: bool

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T0, T1, T2, T3, T4, T5, T6> DataSize for (T0, T1, T2, T3, T4, T5, T6)
where T0: DataSize, T1: DataSize, T2: DataSize, T3: DataSize, T4: DataSize, T5: DataSize, T6: DataSize,

const IS_DYNAMIC: bool

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T0, T1, T2, T3, T4, T5, T6, T7> DataSize for (T0, T1, T2, T3, T4, T5, T6, T7)
where T0: DataSize, T1: DataSize, T2: DataSize, T3: DataSize, T4: DataSize, T5: DataSize, T6: DataSize, T7: DataSize,

const IS_DYNAMIC: bool

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8> DataSize for (T0, T1, T2, T3, T4, T5, T6, T7, T8)
where T0: DataSize, T1: DataSize, T2: DataSize, T3: DataSize, T4: DataSize, T5: DataSize, T6: DataSize, T7: DataSize, T8: DataSize,

const IS_DYNAMIC: bool

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9> DataSize for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9)
where T0: DataSize, T1: DataSize, T2: DataSize, T3: DataSize, T4: DataSize, T5: DataSize, T6: DataSize, T7: DataSize, T8: DataSize, T9: DataSize,

const IS_DYNAMIC: bool

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> DataSize for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10)
where T0: DataSize, T1: DataSize, T2: DataSize, T3: DataSize, T4: DataSize, T5: DataSize, T6: DataSize, T7: DataSize, T8: DataSize, T9: DataSize, T10: DataSize,

const IS_DYNAMIC: bool

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> DataSize for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11)
where T0: DataSize, T1: DataSize, T2: DataSize, T3: DataSize, T4: DataSize, T5: DataSize, T6: DataSize, T7: DataSize, T8: DataSize, T9: DataSize, T10: DataSize, T11: DataSize,

const IS_DYNAMIC: bool

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> DataSize for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12)
where T0: DataSize, T1: DataSize, T2: DataSize, T3: DataSize, T4: DataSize, T5: DataSize, T6: DataSize, T7: DataSize, T8: DataSize, T9: DataSize, T10: DataSize, T11: DataSize, T12: DataSize,

const IS_DYNAMIC: bool

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13> DataSize for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13)
where T0: DataSize, T1: DataSize, T2: DataSize, T3: DataSize, T4: DataSize, T5: DataSize, T6: DataSize, T7: DataSize, T8: DataSize, T9: DataSize, T10: DataSize, T11: DataSize, T12: DataSize, T13: DataSize,

const IS_DYNAMIC: bool

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14> DataSize for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14)
where T0: DataSize, T1: DataSize, T2: DataSize, T3: DataSize, T4: DataSize, T5: DataSize, T6: DataSize, T7: DataSize, T8: DataSize, T9: DataSize, T10: DataSize, T11: DataSize, T12: DataSize, T13: DataSize, T14: DataSize,

const IS_DYNAMIC: bool

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15> DataSize for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15)
where T0: DataSize, T1: DataSize, T2: DataSize, T3: DataSize, T4: DataSize, T5: DataSize, T6: DataSize, T7: DataSize, T8: DataSize, T9: DataSize, T10: DataSize, T11: DataSize, T12: DataSize, T13: DataSize, T14: DataSize, T15: DataSize,

const IS_DYNAMIC: bool

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T> DataSize for Option<T>
where T: DataSize,

const IS_DYNAMIC: bool

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<T> DataSize for &T

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<T> DataSize for &mut T

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<T> DataSize for Box<[T]>
where T: DataSize,

const IS_DYNAMIC: bool = true

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<T> DataSize for Box<T>
where T: DataSize,

const IS_DYNAMIC: bool = T::IS_DYNAMIC

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T> DataSize for BinaryHeap<T>
where T: DataSize,

const IS_DYNAMIC: bool = true

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<T> DataSize for BTreeSet<T>
where T: DataSize,

const IS_DYNAMIC: bool = true

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<T> DataSize for VecDeque<T>
where T: DataSize,

const IS_DYNAMIC: bool = true

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<T> DataSize for Vec<T>
where T: DataSize,

const IS_DYNAMIC: bool = true

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<T> DataSize for Reverse<T>
where T: DataSize,

const IS_DYNAMIC: bool = <T as DataSize>::IS_DYNAMIC

const STATIC_HEAP_SIZE: usize = <T as DataSize>::STATIC_HEAP_SIZE

fn estimate_heap_size(&self) -> usize

impl<T> DataSize for PhantomData<T>

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<T> DataSize for AssertUnwindSafe<T>
where T: DataSize,

const IS_DYNAMIC: bool = <T as DataSize>::IS_DYNAMIC

const STATIC_HEAP_SIZE: usize = <T as DataSize>::STATIC_HEAP_SIZE

fn estimate_heap_size(&self) -> usize

impl<T> DataSize for Receiver<T>

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T> DataSize for Sender<T>

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<T> DataSize for JoinHandle<T>

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<T> DataSize for Receiver<T>

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<T> DataSize for Sender<T>

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<T, E> DataSize for Result<T, E>
where T: DataSize, E: DataSize,

const IS_DYNAMIC: bool

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T, S> DataSize for HashSet<T, S>
where T: DataSize,

const IS_DYNAMIC: bool = true

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<T, const N: usize> DataSize for [T; N]
where T: DataSize,

Available on crate feature const-generics only.

const IS_DYNAMIC: bool = T::IS_DYNAMIC

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T: DataSize> DataSize for Range<T>

const IS_DYNAMIC: bool = T::IS_DYNAMIC

const STATIC_HEAP_SIZE: usize

fn estimate_heap_size(&self) -> usize

impl<T: ?Sized> DataSize for Rc<T>

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<T: ?Sized> DataSize for Weak<T>

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<T: ?Sized> DataSize for Arc<T>

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

impl<T: ?Sized> DataSize for Weak<T>

const IS_DYNAMIC: bool = false

const STATIC_HEAP_SIZE: usize = 0usize

fn estimate_heap_size(&self) -> usize

Implementors§