I think there isn't a "better" performance for this way or that way. It will be depend on the structure and amount of your data-sources and what you want to perform within the gui and then what will be your biggest bottle-neck in your hardware- and system-ressources. This meant you could optimize your app regarding to app-size or load-time or complexity or calculation-times or .... Have a look here to different approaches:
for me join is perf consummer just while loading ,concatenate is less .also i think that when you concatenate certainly you will have duplicated values and automatically you application will be more huge in terme of size (it depends on data).
basically using one of the two method depend on every situation .
I think there isn't a "better" performance for this way or that way. It will be depend on the structure and amount of your data-sources and what you want to perform within the gui and then what will be your biggest bottle-neck in your hardware- and system-ressources. This meant you could optimize your app regarding to app-size or load-time or complexity or calculation-times or .... Have a look here to different approaches:
