[Question, performance analyse]. Which documents eats more resources?

[dz15mlru]

Let’s admit we have a large amount of text, split in a number of different files.
Several tens or hundreds of files, like a book split by pages in N++ files/tabs.

The same total amount of data was splited in 4 ways, and for comparison, we have 4 different cases:

1. a session of 50 unsaved open N++ documents
2. a session of 50 saved open N++ documents
3. a session of 100 unsaved open N++ documents
4. a session of 100 saved open N++ documents

Total data size is equal in all these sessions cases (1=2=3=4)

I’m curious, which session eats more PC resources (RAM)? Which will load faster, etc? In matter of performance, which is the best case for N++?