* robert engels <reng...@ix.netcom.com> [240826 12:24]:
> But why would you want to allocate a new array? This would only be required
> if the MongoDB call were async, and the array cannot be reused.
>
> If you keep allocating new arrays you are putting needless pressure on the GC.
>
True. But I was going on the assumption that the amount of memory
allocated for the 10001 interface values, each holding 50000 records,
swamped the memory used by the slice's backing array. Marking all of
the interface values for collection before going back for another time
through the loop was my goal.
Since mongo.WriteModel is an interface, the memory for each element of
model (the interface value) is kept until that element is overwritten,
even when you have done «model = model[:0]».
The OP can mark each of those elements to be garbage collected and at
the same time avoid reallocating the slice's backing array by assigning
nil to each element, and then reslicing model:
for i := range(len(model)) {
model[i] = nil
}
model = model[:0]
...Marvin
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