No. Non-reference plain old structs are typically more efficient for most operations, up to a certain size (how large, 16, 32, 64 bytes?). Objects have a certa

No. Non-reference plain old structs are typically more efficient for most operations, up to a certain size (how large, 16, 32, 64 bytes?). Objects have a certain overhead, for example each reference uses 8 bytes, and they typically come with a vtable. Also cache efficiency is very important these days. Sharing is detrimental unless memory consumption is an issue. And let's not think about GC overhead. A point class holding two integers is a really bad idea when you have millions of points. Conversely, as objects get larger, it's less likely for two objects to be equal. Interning is just a bad idea for most cases.