Attach (recommended) or Link to PDF file

Wetterpark_Flyer_240410_Faltplan_RPPortalWPOF_07jh.pdf

Web browser and its version

Firefox 128.0.3 (Apple Silicon)

Operating system and its version

macOS 12.7.5 (Monterey) on Apple M1

PDF.js version

Unknown

Is the bug present in the latest PDF.js version?

Yes

Is a browser extension

Yes

Steps to reproduce the problem

• Open the attached PDF, scroll to page 2 and zoom in.

OR

• Go to the demo and quickly scroll down by dragging the scroll bar with your mouse cursor.

What is the expected behavior?

Normal RAM usage – the PDF file is about 11 MB in size and RAM usage should be lower than 250 MB! Apple Preview manages to only need about 200 MB of RAM while displaying the attached file!

What went wrong?

With the attached flyer, the RAM usage suddenly increased by more than one gigabyte, also taking up swap space! This really messes with the usability of my entire computer! At this time, the yellow spike on the left of the memory pressure monitor occurred:

After that, I tried the online demo and did some fast scrolling, increasing Firefox’s RAM usage to almost 3 GB!

Link to a viewer

No response

Additional context

How do you know the version number of pdf.js bundled with Firefox?