Test performance difference between registering entity class and entity metadata instance.

[matoushybl]

We should test performance difference between registering entity classes using these possibilities:

• TorchService.with(this).register(Model.class);
• TorchService.with(this).register(Model$.create());

This should show which method is the best for registering and update wiki with the best one.

[TadeasKriz]

I believe the difference will be marginal, so it might be better to measure it and then on the wiki we should recommend the option better for each use. It might be that in application with more than 10 entities it would be a large difference, so we would recommend the Model$.create() approach and for less entities users might like to use the Model.class because it's more straightforward and better for refactoring.