This is related to bug #267051. You can tell by the upstream bug report. A similar Debian bug report is here http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=506715
Note how the "at-spi-registryd" process appears next to nautilus. I'm attaching 3 gdb backtraces. To obtain these: 1. Install debug packages "nautilus-dbg", "libgtk2.0-0-dbg", "libglib2.0-0-dbg", "libatk1.0-dbg". 2. Completely close nautilus with "nautilus --quit" 3. Run the debugger "gdb nautilus" as described here https://wiki.ubuntu.com/Backtrace 4. I try to open /usr/bin which is guaranteed to have at least 1500 files. 5. Nautilus will eventually load the directory, but you need to wait at least 2.5 minutes on a slow computer. The time increases with the number of files. 6. Interrupt the process in the terminal with Ctrl+C. You may do this while nautilus is still unresponsive; if you wait for it to finish loading the directory you won't have anything interesting in the backtrace. In the first backtrace the only library without symbols is "/usr/lib/gtk-2.0/modules/libatk-bridge.so", which is included in the "at-spi" package, which also provides "/usr/lib/at-spi/at-spi-registryd" 7. To obtain the other two backtraces install the debug symbols for this library, which are found in "libatspi-dbg" 8. Briefly looking at the source code in gail/gailtreeview.c, iterate_thru_children() is a recursive function, and according to one backtrace it is called a gazillion times. 9. The other backtrace shows a different output. You can run gdb several times to get different outputs each time, depending on the moment you hit Ctrl+C. I tested this on a single core, AMD64 processor, running 32-bit Ubuntu 8.10. If you have a multicore machine, you'll see threads everywhere in the backtraces. 10. Running "valgrind" with nautilus takes a LOT of time to even start. It outputs several lines concerning python2.5 and python libraries, which I believe is totally unrelated to this bug. ECC ** Attachment added: "gdb-nautilus-gtk2-glib2-atk1.txt" http://launchpadlibrarian.net/23340915/gdb-nautilus-gtk2-glib2-atk1.txt ** Attachment added: "gdb-nautilus-gtk2-glib2-atk1-atspi-1.txt" http://launchpadlibrarian.net/23340916/gdb-nautilus-gtk2-glib2-atk1-atspi-1.txt ** Attachment added: "gdb-nautilus-gtk2-glib2-atk1-atspi-2.txt" http://launchpadlibrarian.net/23340917/gdb-nautilus-gtk2-glib2-atk1-atspi-2.txt -- Nautilus is very slow in list mode with assistive technologies enabled https://bugs.launchpad.net/bugs/159042 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is a bug assignee. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs