[GAP Forum] Immutable lists and memory usage

[Keshav Rao Kini]

Hello,

Here is the result of some experimentation I did:

gap> x := [];; for i in [1..100] do Add(x, i); od; MemoryUsage(x); MakeImmutable(x);; MemoryUsage(x); ShrinkAllocationPlist(x); MemoryUsage(x);
512
512
416

I'm wondering why ShrinkAllocationPlist isn't called automatically by MakeImmutable, since once I use MakeImmutable() it should be impossible to extend x or even to shrink it, if I understand correctly...

-Keshav

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