tips for Opera users
gmccullagh at gmail.com
Tue Sep 18 10:57:03 BST 2007
I got the patch to apply and work. I can't say for sure that it will fix
your issue but it might at least alleviate it.
If I understand correctly, Federico's patch doesn't change the fact that
firefox has to load all of the images, as pixmaps, into video ram to
display the page. I presume all browsers must at some stage load each
image in that way. It seems his patch causes the pixmaps to be removed
after a short period, unless the particular picture is actually on-screen
at that moment.
This seems to work well enough. However, if you try to quickly scroll
through the screen quickly, you'll see the video RAM spike to similar
values as before as every image has to be painted before any get removed.
For this reason, I think it'll still be possible to crash the thin client,
though perhaps it'll be less likely, as firefox will be purging memory.
One small part of the patch is:
+ /* FIXME: don't hardcode this */
+ return 5000; /* 5 seconds */
which suggests the time limit is 5 seconds. We could perhaps try lowering
this to make the cache time shorter and make the crash less likely.
On Tue, 18 Sep 2007, Gavin McCullagh wrote:
> > http://www.carteretcountyschools.org/bms/teacherwebs/sdavenport/artgallery6.htm)
> res-base Wins GCs Fnts Pxms Misc Pxm mem Other Total PID Identifier
> 6400000 276 477 1 381 608 294074K 32K 294107K 21296 Mrs. Davenport's Web - Gran Paradiso
At different moments with that webpage loaded, I now get:
res-base Wins GCs Fnts Pxms Misc Pxm mem Other Total PID Identifier
4c00000 110 99 1 48 88 281122K 7K 281130K 23604 Mrs. Davenport's Web - Gran Paradiso
4c00000 110 80 1 29 69 66303K 7K 66310K 23604 Mrs. Davenport's Web - Gran Paradiso
4c00000 139 125 1 57 144 550K 10K 561K 23604 Mrs. Davenport's Web - Gran Paradiso
the bottom one is where firefox is on a different virtual desktop and is
therefore not being painted at all. The top is where I'm scrolling through
the page and the middle is just sitting on the page.
Firefox is very slow at rendering this page now. Every time I go back to
that desktop, there's a delay in rendering it. However, perhaps that's not
as bad as a crash. The machine I'm on is a dual core 64-bit athlon with
some sort of flashy ATI video card, but I am using the vesa driver (to
avoid proprietary video driver), which is not the quickest thing.
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