For whatever reason (I don't like beeps so perhaps there is no audio theme installed) - libcanberra (gtk?) consumes quite a chunk of time and energy every time LibreOffice shows a dialog.

Interestingly, it seems to do this between us mapping the dialog and it getting rendered - no doubt this is a consequence of our lame-ass idle loop handling (almost certainly) - but ... it'd be great if it happened just once but ...

I get traces like this:

#0  0xb7fdc424 in __kernel_vsyscall ()
#1  0xb7e4620b in open () at ../sysdeps/unix/syscall-template.S:81
#2  0xb7dda29c in __GI__IO_file_open (fp=fp@entry=0x87de6c0, filename=filename@entry=0x87ded20 "/usr/share/xfce/sounds/freedesktop/window.wav", 
    posix_mode=posix_mode@entry=0, prot=prot@entry=438, read_write=read_write@entry=8, is32not64=is32not64@entry=0) at fileops.c:227
#3  0xb7dda46b in _IO_new_file_fopen (fp=fp@entry=0x87de6c0, filename=filename@entry=0x87ded20 "/usr/share/xfce/sounds/freedesktop/window.wav", 
    mode=<optimized out>, mode@entry=0xb0352f51 "r", is32not64=is32not64@entry=0) at fileops.c:332
#4  0xb7dceb7b in __fopen_internal (filename=filename@entry=0x87ded20 "/usr/share/xfce/sounds/freedesktop/window.wav", 
    mode=mode@entry=0xb0352f51 "r", is32=is32@entry=0) at iofopen.c:90
#5  0xb7dd114b in _IO_fopen64 (filename=filename@entry=0x87ded20 "/usr/share/xfce/sounds/freedesktop/window.wav", mode=mode@entry=0xb0352f51 "r")
    at iofopen64.c:39
#6  0xb034d36d in ca_sound_file_open (_f=_f@entry=0x87dedd0, fn=fn@entry=0x87ded20 "/usr/share/xfce/sounds/freedesktop/window.wav")
    at read-sound-file.c:62
#7  0xb034f71d in find_sound_for_suffix (f=f@entry=0x87dedd0, sfopen=sfopen@entry=0xb034d300 <ca_sound_file_open>, 
    sound_path=sound_path@entry=0x0, theme_name=theme_name@entry=0x87b1b10 "freedesktop", name=name@entry=0x87eb7a0 "window", 
    path=path@entry=0x87dce80 "/usr/share/xfce/sounds", suffix=<optimized out>, suffix@entry=0xb03539cc ".wav", locale=locale@entry=0x0, 
    subdir=subdir@entry=0x0) at sound-theme-spec.c:461
#8  0xb034faa8 in find_sound_in_locale (f=0x87dedd0, f@entry=0x87eb7a0, sfopen=0xb034d300 <ca_sound_file_open>, sfopen@entry=0x87b1b10, 
    sound_path=0x0, theme_name=0x87b1b10 "freedesktop", name=0x87eb7a0 "window", path=0x87de608 "/usr/share/xfce", locale=0x0, subdir=0x0)
    at sound-theme-spec.c:498
#9  0xb034fde9 in find_sound_for_locale (f=0x87eb7a0, f@entry=0x87dedd0, sfopen=0x87b1b10, sfopen@entry=0xb034d300 <ca_sound_file_open>, 
    sound_path=sound_path@entry=0x0, theme_name=theme_name@entry=0x87b1b10 "freedesktop", name=name@entry=0x87eb7a0 "window", 
    path=path@entry=0x87de608 "/usr/share/xfce", locale=0x0, locale@entry=0x8356320 "en_US.utf8", subdir=subdir@entry=0x0)
    at sound-theme-spec.c:562
#10 0xb0350064 in find_sound_for_name (f=f@entry=0x87dedd0, sfopen=sfopen@entry=0xb034d300 <ca_sound_file_open>, 
    sound_path=sound_path@entry=0x0, theme_name=theme_name@entry=0x87b1b10 "freedesktop", name=name@entry=0x87eed8c "window-new", 
    path=path@entry=0x87de608 "/usr/share/xfce", locale=locale@entry=0x8356320 "en_US.utf8", subdir=subdir@entry=0x0) at sound-theme-spec.c:600
#11 0xb0350d86 in find_sound_in_subdir (f=f@entry=0x87dedd0, sfopen=0xb034d300 <ca_sound_file_open>, sfopen@entry=0x87de608, sound_path=0x0, 
    theme_name=0x87b1b10 "freedesktop", name=0x87eed8c "window-new", locale=0x8356320 "en_US.utf8", subdir=0x0) at sound-theme-spec.c:650
#12 0xb035116b in find_sound_in_theme (f=f@entry=0x87dedd0, sfopen=0x87de608, sfopen@entry=0xb034d300 <ca_sound_file_open>, 
    sound_path=sound_path@entry=0x0, t=0x87b1b10, name=name@entry=0x87eed8c "window-new", locale=locale@entry=0x8356320 "en_US.utf8", 
    profile=<optimized out>, profile@entry=0xb0353a99 "stereo") at sound-theme-spec.c:721
#13 0xb0351668 in find_sound_for_theme (profile=0xb0353a99 "stereo", locale=0x8356320 "en_US.utf8", name=0x87eed8c "window-new", 
    theme=0x87b0f94 "freedesktop", t=0x87b1418, sound_path=0x0, sfopen=0xb034d300 <ca_sound_file_open>, f=0x87dedd0) at sound-theme-spec.c:750
#14 ca_lookup_sound_with_callback (f=f@entry=0x87dedd0, sfopen=0xb034d300 <ca_sound_file_open>, sound_path=sound_path@entry=0x0, 
    t=t@entry=0x87b1418, cp=cp@entry=0x87b0dc0, sp=sp@entry=0x87eb9b0) at sound-theme-spec.c:827
#15 0xb03519e5 in ca_lookup_sound (f=f@entry=0x87dedd0, sound_path=sound_path@entry=0x0, t=t@entry=0x87b1418, cp=0x87b0dc0, 
    sp=sp@entry=0x87eb9b0) at sound-theme-spec.c:849
#16 0xac8a7a99 in oss_driver_play (c=0x87b0cb8, id=0, proplist=0x87eb9b0, cb=0x0, userdata=0x0) at oss.c:434
---Type <return> to continue, or q <return> to quit---
#17 0xb03526b3 in driver_play (c=c@entry=0x87b0cb8, id=id@entry=0, pl=pl@entry=0x87eb9b0, cb=cb@entry=0x0, userdata=userdata@entry=0x0)
    at dso.c:342
#18 0xb034b298 in ca_context_play_full (c=0x87b0cb8, id=id@entry=0, p=p@entry=0x87eb9b0, cb=cb@entry=0x0, userdata=userdata@entry=0x0)
    at common.c:522
#19 0xac6fb583 in multi_driver_play (c=0x87b8978, id=0, proplist=0x87eb9b0, cb=0x0, userdata=0x0) at multi.c:273
#20 0xb03526b3 in driver_play (c=c@entry=0x87b8978, id=id@entry=0, pl=pl@entry=0x87eb9b0, cb=cb@entry=0x0, userdata=userdata@entry=0x0)
    at dso.c:342
#21 0xb034b298 in ca_context_play_full (c=0x87b8978, id=0, p=0x87eb9b0, cb=0x0, userdata=0x0) at common.c:522
#22 0xb035aa16 in ca_gtk_play_for_widget () from /usr/lib/libcanberra-gtk.so.0
#23 0xb06460de in ?? () from /usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so
#24 0xb06463de in ?? () from /usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so
#25 0xb0ba5748 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#26 0xb3eb0530 in g_idle_dispatch (source=source@entry=0x87eabb0, callback=0xb0ba56f0, user_data=0x87f0810) at gmain.c:5251
#27 0xb3eb37de in g_main_dispatch (context=0x8550f28, context@entry=0x85a8e28) at gmain.c:3066
#28 g_main_context_dispatch (context=context@entry=0x8550f28) at gmain.c:3642

And I get a huge slew of files:

[pid 18247] access("/opt/kde3/share/sounds/window.disabled", F_OK) = -1 ENOENT (No such file or directory)
[pid 18247] open("/opt/kde3/share/sounds/window.oga", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/opt/kde3/share/sounds/window.ogg", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/opt/kde3/share/sounds/window.wav", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] access("/home/michael/.local/share/sounds/freedesktop/stereo/en_US.utf8/window-new.disabled", F_OK) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/en_US.utf8/window-new.oga", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/en_US.utf8/window-new.ogg", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/en_US.utf8/window-new.wav", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] access("/home/michael/.local/share/sounds/freedesktop/stereo/en/window-new.disabled", F_OK) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/en/window-new.oga", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/en/window-new.ogg", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/en/window-new.wav", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] access("/home/michael/.local/share/sounds/freedesktop/stereo/C/window-new.disabled", F_OK) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/C/window-new.oga", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/C/window-new.ogg", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/C/window-new.wav", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] access("/home/michael/.local/share/sounds/freedesktop/stereo/window-new.disabled", F_OK) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/window-new.oga", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/window-new.ogg", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/window-new.wav", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] access("/home/michael/.local/share/sounds/freedesktop/stereo/en_US.utf8/window.disabled", F_OK) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/en_US.utf8/window.oga", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/en_US.utf8/window.ogg", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/en_US.utf8/window.wav", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] access("/home/michael/.local/share/sounds/freedesktop/stereo/en/window.disabled", F_OK) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/en/window.oga", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/en/window.ogg", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/en/window.wav", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] access("/home/michael/.local/share/sounds/freedesktop/stereo/C/window.disabled", F_OK) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/C/window.oga", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/C/window.ogg", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/C/window.wav", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] access("/home/michael/.local/share/sounds/freedesktop/stereo/window.disabled", F_OK) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/window.oga", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/window.ogg", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/home/michael/.local/share/sounds/freedesktop/stereo/window.wav", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] access("/usr/share/xfce/sounds/freedesktop/stereo/en_US.utf8/window-new.disabled", F_OK) = -1 ENOENT (No such file or directory)
[pid 18247] open("/usr/share/xfce/sounds/freedesktop/stereo/en_US.utf8/window-new.oga", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/usr/share/xfce/sounds/freedesktop/stereo/en_US.utf8/window-new.ogg", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] open("/usr/share/xfce/sounds/freedesktop/stereo/en_US.utf8/window-new.wav", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
[pid 18247] access("/usr/share/xfce/sounds/freedesktop/stereo/en/window-new.disabled", F_OK) = -1 ENOENT (No such file or directory)

to excerpt a bit in the middle - but there are many thousands of these. I have:

libcanberra-gtk2-module-0.30-6.1.3.i586
libcanberra-gtk3-module-0.30-6.1.3.i586
libcanberra0-debuginfo-0.30-6.1.3.i586
libcanberra-gtk0-0.30-6.1.3.i586
canberra-gtk-play-0.30-6.1.3.i586
libcanberra-gtk3-0-debuginfo-0.30-6.1.3.i586
libcanberra-gtk3-0-0.30-6.1.3.i586
libcanberra-devel-0.30-6.1.3.i586
libcanberra-gtk3-module-debuginfo-0.30-6.1.3.i586
libcanberra-gtk-module-common-0.30-6.1.3.i586
libcanberra0-0.30-6.1.3.i586

open openSUSE 13.1 - and am using gtk2.