On Tuesday, 4 September 2018 10:29:45 UTC+2, Ingo Jaeckel wrote:
>
> What are other idiomatic ways to determine the runtime memory use of a
> struct which contains (among other things) slices?
>
That depends a lot on your definition of "runtime memory use":
Consider:
a := [100]int16
b := bar{C: a[:]}
Variable a clearly "uses" 200 bytes (maybe plus some for alignment).
But b.C uses a's memory as the backing array. Attributing a slice's
memory to the slice might result in double counting these 200 bytes.
(Same for structs which contain pointers: Two variables may point to
the same object. Where do you count the memory used?).
Maybe it is best to think of bar's memory usage as 4*8 bytes and not
to attribute C's backing array memory to bar.
V.
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