in reply to Re: Size of inside out object
in thread Size of inside out object

Say I have an object "car" with attributes color and speed.
Classical approach:
Car A = hash A with keys color and speed
Car B = hash B with keys color and speed

Inside out approach:
Car A = one hash for color, another for speed
Car B = one hash for color, another for speed

Which one will use less memory?

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Re^3: Size of inside out object
by BrowserUk (Patriarch) on Jun 05, 2012 at 16:40 UTC

    For your given example, both will require two hashes, each with 2 of the 8 slots used. As near as make no difference, the memory usage will de identical for both.

    However, lets say you have 10 instances of a class that has 2 attributes:

    1. Classical: 10 hashes with 2 of 8 slots used ~ 80 hash slots + 20 scalars + 10 hash headers.
    2. Inside out: 2 hashes each with 10 of 16 slots used ~ 32 hash slots + 20 scalars + 2 hash headers.
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[reply]
      Thanks! I'll have to research more, but I got what I needed to know!!
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