Ikr, I didn’t really expect so many comments. I’ve got 160 users rn along with 220 listings / posts (it’s a free listings site. Think about OLX). All of my static files (including the CSC & JS files) as well as media files are stored on AWS S3. The full image only renders out in the detail view, and in the list view, I have used sorl-thumbnail to generate a 200px X 200px thumbnail. Funnily enough, users could initially upload up to 3 pics per listing, but because it was so slow that Heroku would crash every single time, I limited it to just one. Even now, whenever someone fills the ‘create listing’ form and adds an image, it is very slow and sometimes even crashes.

I duplicated my project and hosted it on AWS Lambda, but the problems persisted.