Red Hat Bugzilla – Bug 817762
firefox performance is bad on certain sites, unlike chromium
Last modified: 2013-04-18 09:09:03 EDT
Description of problem:
while in gmail, firefox has difficulties scrolling up and down (with mouse scroll wheel) both in the main frame and in the left frame. chromium behaves flawlessly.
Version-Release number of selected component (if applicable):
# rpm -q firefox
Steps to Reproduce:
1.log into gmail account
2.(try to) scroll left frame or the main page in firefox or in chromium
in chromium works as expected, in firefox takes a while until something happens
both should work
same latency can be seen in firefox if clicking on user menu ("cornel panceac" in my case) and again works fine in chromium.
this bug appeared after replacing the (newer) pci express video card (and the dead motherboard) with another motherboard and an older fx 5200 nvidia agp graphics card, that, unlike the pci-e card, does not support 3d with nouveau.
but these are just guessing :)
btw, gnome-control-center graphics says: Gallium 0.4 on llvmpipe (LLVM 0x300)
Do you run gnome-shell or any other environment? Can you try it in fall back mode? (System-setings->Details and the last item there contains a fallback mode switch).
This was observed in gnome 3 fallback mode. I could not run gnome-shell on this video card.
I see. And I suppose it happens with the new gmail interface, not with the old one. I guess it may be a bug in cairo/X server, some graphics operation may not be supported by hardware and have to be painted by CPU.
One options may be to disable hardware acceleration for layers, in Preferences->Advanced disable "Use hardware acceleration when available".
Another option may be to install nvidia binary drivers and see if it helps.
with or without that option set, firefox requires one or more seconds between a mouse click and the reply event. indeed, it's the new gmail interface but as i said, chrome has no problem with it. now i'm gonna change the video card and report back if the new card is better.
i forgot about that: nvidia drivers are not available because the new xorg does not work with them (173*).
Can you please test firefox binary from mozilla.org?