I would be suprised if some os detects the page of zeros and removes that allocation until you need it. this seems like a common enough case as to make it worth

I would be suprised if some os detects the page of zeros and removes that allocation until you need it. this seems like a common enough case as to make it worth it when memory is low. I'm not aware of any that do, but it wouldn't be that hard and so seems like someone would try it.