Optimize taking powers of objects with memory #5968
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fingolfin
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topic: performance
ThomasBreuer
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Apr 4, 2025
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ThomasBreuer
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I am not really sure about the meaning of the record components in an IsObjWithMemory object.
Perhaps we have to document their meaning first.
lib/memory.gi
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| slp := a!.slp; | ||
| if a!.n = 0 then | ||
| if a!.n = 0 or b = 0 then | ||
| return ObjWithMemory( slp, 0, a!.el ); |
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My understanding of a!.el is that it is the group element in question. If b = 0 but a!.n <> 0 then a!.el can be something different from the identity.
lib/memory.gi
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| if a!.n = 0 or b = 0 then | ||
| return ObjWithMemory( slp, 0, a!.el ); | ||
| elif b = 1 then | ||
| return ObjWithMemory( slp, a!.n, a!.el ); |
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Can't we simply return a?
The entries in the result of GeneratorsWithMemory are immutable. Do we have situations where objects in IsObjWithMemory are mutable?
(As far as I see, all this is not really documented.)
Avoid enlarging their SLPs when there is no need for it.
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Avoid enlarging their SLPs when there is no need for it.