Slow performance due to many png files
I am working on an experiment in which my cues are pictures of E-Mails (.png). I startet with a test trial with 5 pictures and everything works so far. The experiment is to become very huge, there are about 350 png files needed in the end. My question now is if this will in any way slow down the program. If so would it be better if I typed the E-Mails as textlines and used these as cues?
Thanks in advance!