Crate deepsize

A utility for recursively measuring the size of an object

This contains the DeepSizeOf trait, and re-exports the DeepSizeOf derive macro from deepsize_derive

use deepsize::DeepSizeOf;

#[derive(DeepSizeOf)]
struct Test {
    a: u32,
    b: Box<u8>,
}

let object = Test {
    a: 15,
    b: Box::new(255),
};

// The stack size of the struct:
//    The size of a u32 (4)
//    4 bytes padding (64 bit only)
//    The stack size of the Box (a usize pointer, 32 or 64 bits: 4 or 8 bytes)
// + the size of a u8 (1), the Box's heap storage
#[cfg(target_pointer_width = "64")]
assert_eq!(object.deep_size_of(), 17);
#[cfg(target_pointer_width = "32")]
assert_eq!(object.deep_size_of(), 9);

Macros

• known_deep_size
  A macro to generate an impl for types with known inner allocation sizes.

Structs

• Context
  The context of which references have already been seen. This should only be used in the implementation of the deep_size_of_children function, and (eventually, when this reaches 0.2) will not be able to be constructed, and only obtained from inside the function.

Traits

• DeepSizeOf
  A trait for measuring the size of an object and its children

Derive Macros

• DeepSizeOf