Question

I am aware of this answer that explains what setting lazy=”extra” does.

My question is, is there any costs associated with using lazy=”extra”? Why wouldn’t we just set lazy=”extra” to every instance where we would otherwise set it to “true”? It seems it is same as “true” but better?

Answer 1

The only thing I can think of is that if a collection is mostly used as data source or for iterating on a loop it would be better to get the full collection first time you access ANY property (even Count).

Otherwise you might end up executing more queries than necessary.

For example

bool found = false;
int pos = 0;
while (!found && pos < Collection.Count)
{
    if (MyFunction(Collection[pos]))
    {
         found = true;
    }
    pos++;
}