Interface HeapSize

  • All Known Implementing Classes:
    CachedBlock, CachedBlockQueue, LruBlockCache

    public interface HeapSize
    Implementations can be asked for an estimate of their size in bytes.

    Useful for sizing caches. Its a given that implementation approximations do not account for 32 vs 64 bit nor for different VM implementations.

    An Object's size is determined by the non-static data members in it, as well as the fixed Object overhead.

    For example:

     public class SampleObject implements HeapSize {
       int[] numbers;
       int x;
    • Method Detail

      • heapSize

        long heapSize()
        Approximate 'exclusive deep size' of implementing object. Includes count of payload and hosting object sizings.