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Download time and 3D Matrices

URL of experiment: https://gitlab.pavlovia.org/Aurelio/test3

Description of the problem:

Good morning,

I’m piloting an experiment which requires about 2500 images and it takes a few minutes to download all of them before the experiment can begin. Each image is already quite small (9 KB JPEG) and they cannot be compressed any further.

I was wondering whether it would be possible to store them all in a big 3D matrix that gets loaded in all at once instead of a file at a time. Would that reduce the download time?

Many thanks in advance,

Aurelio