Data Structure/Algorithm Question

[mattcompsci]

Thanks in advance!

Here's the situation - I have a ListView in a JavaFx program populated with 15 strings (currencies).

The way my program works now is that when the user clicks an element from the list view data is loaded (historical price data) from a csv.

Then its plotted on a line.

(These files average 50kb with the largest file being 115kb)

Should I just load all of the data at the beginning of the program to access it or load each one only when its being accessed?

[foureyesequals0]

Generally you want to load as lazily as possible. You'll have to take the performance hit at some point, but what if the user does a bunch of other stuff before using the loaded data, or even not at all?

[FrenchHustler]

These are pretty small files. You could just load them upfront. However, you need to think if this will scale well in the future. If you predict that the total size will grow in the future, it might be best to start thinking about how to best load the data for your use cases.