Under the hoodTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
File ReadingArea: what it touches
ImprovementsKind: in v2.1.248,
ImprovementsSection of the release
What
Limits on reading images and PDFs are collected into named profiles, chosen by a switch between session and default settings. Raw images are capped at 307200 bytes, a PDF read covers at most 3 pages, and oversized images are downscaled to fit 2000x2000 and 5242880 bytes of encoded data.
Details
The whole-PDF read budget in one profile is 0 bytes, so PDFs go through the per-page path rather than being read in full.
Which profile applies is decided per session rather than globally.
Evidence
pdfMaxPagesPerRead
Strings lifted out of the shipped bundle, so the claim above can be checked against them.