For a shiny app is it better to have many "little" rds input or one "big" rds input ?

Hi,

I'm doing an app with shiny and my input data is large (~million rows and more than 50 columns) when I merge/concatenate all.
In this case, is it better to separate my data in 5 "little" data or keeping it like that ? thanks !

The easiest way to find out is to try and see what is better.

As an aside, I would look into parquet/arrow/fst/vroom (https://data.nozav.org/post/2019-r-data-frame-benchmark/) file formats when you are working with such large files.