If you were using append, then yes. Minor nit: when allocating with length (make(type, len)), you’ll get a slice with zero values for n elements.

If you use make(type, len, capacity), then it would only reallocate if your estimated size was under the actual size.

Also I believe that re-slicing would still use the same underlying array, so it would set the length but still keep the capacity.

You’d have to create a new slice of actual capacity and copy to it.