Nette: Models vs vendor lib

Question

I have few models, which I've been implementing for a while in every sandbox project and it got me thinking. What is the difference between few models with constant implementation Vs. my own lib, which would in theory contain same files.

Question #1 : Is there any difference in exec time & page loading between few model objects and same objects from library?

Question #2 : Why should I use library instead of few models (or vice versa)?

Question #3 : If there isn't any difference in this two, should I create my own lib just for easier composer implementation OR some sort of custom-sandbox git rep with models is better option?

Answer 1

1. It isn't or is negligible. Your classes always have to be included. It doesn't matter if they are included by composer autoload or nette RobotLoader.
2. If particular functionality can help other people, you can help someone a lot by creating a library. If it is too specific for your app, go with libs dir or something directly in app, you can change functonality more easily later if needed.
3. I would say both. Creating and maintaining sandbox is much easier than lib shared by many projects. With lib, you need to keep backward compatibility for example. Also, if you have many non-related classes, it doesn't make much sense creating one library from them. Reather create more libraries implementing specific functionality. For example, logging class which will include your LogModel. But before you start, try search packagist if there already isn't lib you need. For logging, Monolog can be usefull. Your calendar class is great candidate for library.