I downloaded this file https://indico.cta-observatory.org/event/5245/contributions/44397/attachments/25675/37613/Markoff_slides.pdf https://indico.cta-observato

I downloaded this file https://indico.cta-observatory.org/event/5245/contributions/44397/attachments/25675/37613/Markoff_slides.pdf https://indico.cta-observatory.org/event/5245/contributions/... and tried timing how long it took for the standard firefox vs this MuPDF viewer to render the first slide and there is like at least 3 second difference. As others in the thread also report significant speed gains I think you either have some weird issue with your setup or how you measure performance.