On Sat, 2005-08-20 at 20:10 -0400, Raman Gupta wrote: > The firefox on my fully updated Fedora Core 4 box renders many larger > pages very slowly. During the page rendering, Firefox "hangs" > completely. A good test page is: > > http://scragz.com/tech/mozilla/test-rendering-time.php Thanks for the analysis. I've got 68 seconds on FC4 updated. Would you please file a bug about it on bugzilla.redhat.com and let us know the bug number? Is somebody able to test this with firefox 1.5 in fedora development? I'm CCing fedora-test. > Rendering the scragz page, and others, on the same hardware and OS, > various other browsers are over 4 times faster, including Firefox for > windows: > > Linux Firefox 1.06 42.23 > Linux Konqueror 3.4.2-0.fc4.1 13.27 > Linux Opera 8.02 build 1272 7.08 > Windows (via VMWare) Firefox 1.06 8.18 > Windows (via VMWare) IE 6 7.12 > > All of the above times are without any extensions *or* plugins installed > (in fact, with Greasemonkey installed, Linux Firefox took over 100 > seconds to render). > > Running an strace on the Firefox process while loading occurred shows a > lot of time being spent in brk() calls (usually one brk call was over > 20s). Here is output from "vmstat 5" while the page rendering is occurring: > > procs -----------memory---------- -swap- ---io--- --system-- ----cpu---- > r b swpd free buff cache si so bi bo in cs us sy id wa > [...] > 0 0 620600 76896 7292 432368 0 0 1 4 2212 4947 7 5 88 0 > 1 0 620600 76896 7316 432372 0 0 0 18 2213 4963 9 6 85 0 > [page load starts] > 5 0 620600 76772 7348 432624 0 0 6 66 2282 4882 64 10 25 1 > 1 0 620600 76672 7364 432640 0 0 1 6 2205 4909 94 6 0 0 > 3 0 620600 76648 7388 432652 0 0 2 20 2228 4943 92 7 0 0 > 1 0 620600 76416 7412 432668 0 0 1 67 2217 4910 94 6 0 0 > 2 0 620600 76408 7428 432684 0 0 1 18 2224 4889 93 7 0 0 > 2 0 620600 76276 7436 432696 0 0 1 2 2210 4889 93 7 0 0 > 1 0 620596 76260 7452 432712 1 0 2 18 2213 4871 91 9 0 0 > 1 0 620596 76292 7468 432728 0 0 1 11 2213 4868 90 10 0 0 > [page load ends] > 3 0 620596 75384 7524 432756 0 0 6 26 2258 5537 69 12 19 0 > 0 0 620596 75308 7540 432768 0 0 1 14 2215 4885 16 7 77 0 > 0 0 620596 75144 7680 432840 0 0 12 161 2232 4957 10 8 81 1 > 0 0 620596 75176 7696 432856 0 0 1 50 2213 4926 7 6 87 0 > > So swapping is not an issue. Lots of memory is available if cache is > included. Not much disk activity is happening, but the CPU is getting > hammered. > > This was also tested using a completely new profile (no ~/.mozilla > directory present), with the same result. > > Can anyone else duplicate these results? Does anybody have any other > debugging/setup/configuration suggestions? > > Cheers, > Raman Gupta > -- Marius Andreiana
