What is the maximum size of an Object Repository?

There is no official information about this. HP or Mercury didn't tell about what is the maximum size of Object repository. How ever if number of objects in object repository is more automatically script running performance will be decreased.
Do remember that Script running performance will not depends on size of the repository. It depends only on number of objects.
Ex:-
If you add 10 bitmap check points in script on a single browser object, automatically object repository size will exceed 20 mb. But you don't find any performance issue. Because you have only one object in the repository.