What a difference three lines of code can make. That's the typical case of "that seemed to be a good idea". I don't know how did I think it would work out on the long run. Next step will be reduceing the enourmous CPU usage as well.

What did you optimize?

@raizsh
I've changed how product image thumbnails and their full size counterparts are loaded on the product list page. I don't want to provide more details since I'm afraid of being tortured and banished from here for the amateur and stupid solution I've had before. :D
But you know. People learn from their mistakes.

@Teosz
Yeah I understand
Thanks :)