1901708 - Rendering of Tracemonkey PDF slower on Mac with hardware acceleration enabled

Status: NEW

(Core :: Graphics: Canvas2D, defect)

Description

[Marco Castelluccio [:marco]]

Similar to bug 1895499, but in this case there are no filters: https://github.com/mozilla/pdf.js/discussions/18199#discussioncomment-9721592.

The PDF is the one from https://github.com/mozilla/pdf.js/blob/361b54ec137f0cd6200b41294a0725b3df427e2e/web/compressed.tracemonkey-pldi-09.pdf.

Comment 1

[Calixte Denizet (:calixte)]

Attachment: page11.pdf

I extracted the page 11 from the pdf and removed useless stuff.
I got a profile from Mac with nightly:
https://share.firefox.dev/3XhOggI
Setting gfx.canvas.accelerated to false improved speed.

Out of curiosity, I took a profile on Windows 11 (with gfx.canvas.accelerated set to true):
https://share.firefox.dev/3VlECal

Comment 2

[Mayank Bansal]

gpu-canvas: https://share.firefox.dev/3VlG6Ba
d2d-canvas: https://share.firefox.dev/45gTKdv

Comment 3

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:lsalzman, could you have a look please?

For more information, please visit BugBot documentation.

Comment 4

[Calixte Denizet (:calixte)]

I just tried with the attached pdf in nightly on mac and it works for me now.
The performance for rendering the page are almost the same now whatever gfx.canvas.accelerated is.