On Wed, Apr 10, 2013 at 03:57:21PM +0000, Christian Weisgerber wrote: > A number of weeks ago, I reported this problem on freebsd-ports: > > -------> > Viewing large images has become cumbersome with the switch from > Firefox 18 to 19. Am I the only one to notice this? > > Wikipedia's high-resolution pictures of the day are great for this: > https://upload.wikimedia.org/wikipedia/commons/e/e9/Bison_skull_pile_edit.jpg > > What happens is that Firefox loads the image and then does some > sort of operation that causes the X11 server to be busy for a > noticeable amount of time. During this time the whole X11 session > hangs. If you have a network login, you can see the Xorg process > eat all the CPU it can get. The duration of this delay varies and > depends on the size of the image; with the one above it just took > 30 seconds.
You'll also see the memory footprint of the Xorg process climb to the ceiling during that period. > This isn't entirely new. With previous versions of Firefox it > happened when I accidentally dragged an image. But now with > Firefox 19, just viewing the image is enough. Needless to say, > this is painful if you are going through a number of large images > and are forced to pause for half a minute each. > <------- > I've seen that too for a long time, and what's most annoying imho is that it also does it for large images scaled down with small width= and height= values in the image tag. Since afaik the X server offers no services to help scaling down the image, I didn't understand the point in firefox allocating the full size pixmap (or even several copies of it) in the X server. But yes, dragging may make sense. So ff may indeed be copying the full size image fo one of X cut buffers, which have the ability to contain stuff other than text... > Unsurprisingly, several people have now run into the same problem on > OpenBSD. > > Workarounds are setting MOZ_DISABLE_IMAGE_OPTIMIZE=1 in the environment > or disabling gfx.xrender.enabled in about:config. (You have to > restart Firefox after toggling gfx.xrender.enabled.) > > I'm throwing this out there, but users shouldn't really be required > to invoke magic incantations. > > -- > Christian "naddy" Weisgerber na...@mips.inka.de > -- Matthieu Herrb
