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** Slow things for no reason:
+ 'libunoexcept.so'
+ -all- exception type data in here ...
+ really early in the link chain
+ ~all UNO plugins => loaded as 'local' modules.
+ 1 method:
+ extern "C" megaThrow ():
+ try { throw (a); } catch () {};
etc...
600 million cycles:
+ desktop::FirstStart::execute
+ svt::RoadmapWizard::RoadmapWizard
+ [foo] - bogus ? just hides vcl init ...
+ Why load the VCL resource file before showing splash
+ only then load intro.bmp [why?]
+ mainapp_16.png ? - is it the WM icon ?
+ can we defer that ?
[ save 12ms + seeks: ]
+ libfileacc.so - 2
+ stat program/res/ - 1
+ stat share/config/res - 1
+ resource/vcl680en-US.res
+ 2 + read/seek/read - 2
+ do the force-into-memory thing for types.rdb & services.rdb
+ Manual edit of ~/.setup.xcu with vi - works, settings still persists
OO.o potential performance issues:
+ loads of bogus lseeking to see if we've hit EOF
in resource file reading [ screws with kernel
readahead ]
+ these files are not dynamic anyway [!]
+ we have already statted them before opening.
+ load all soffice.cfg/modules/swriter/* toolbar info
+ however - we only need a few toolbars,
+ can we not load/parse as needed ?
[ + do we need names for menu or something ? ]
+ load _lots_ of configuration data:
+ do we need it all ? [ are we sure ? ]
+ GL.so - who is loading that on startup & why ?
+ VCL dependency pruning:
+ libsndfile.so.1, libportaudio.so.0 (nas?)
+ hack plugin code into salsound2.cxx
+ dyload them as needed.
+ [ sndfile == 300kb+ ] portaudio == small.
+ dlopen sndfile as needed,
+ static link portaudio if non-system
+ cut at 'X11SalInstance::CreateSalSound' ?
+ psprint
+ jvmfwklib
+ SVX deps pruning
+ libavmedia - linked in (why?)
+ Java deps too entrenched to prune:
+ sj2 (libj680li_g.so) -> automation, basic, sfx2, so3 - odd.
depends on jvmaccesslib
+ jvmaccesslib / jvmfwk - in vcl, psprint, desktop, svx
TODO:
+ analyse all libraries loaded on writer startup
+ grep 'open("' /tmp/newlog | grep -v 'ENOENT' | grep -v '<unfinished>'
+ re-analyse for running 'soffice' not soffice.bin [!]
** osl_psz_loadModule
+ loads simplereg, nestedreg twice too ...
+ configmgr2.uno.so - 12x
+ libgcc3_uno.so - 21x
+ libfwk - 15x
+ libsvt - 3x
+ Duplicate opens are fairly low-cost
- reading glibc/elf/* - not a problem ...
0.000040 0.46013 open("/usr/lib/libjpeg.so.62", O_RDONLY) = 3 [28330] - why - do we load any jpegs ?
+ required by svtools 's source/filter.vcl/jpeg/
[are these used much?]
0.000030 0.00930 open("./libjvmfwk.so.3", O_RDONLY) = 3 [28330] - why load java stuff on startup ?
0.000031 0.27792 open("./libjvmaccessgcc3.so.3", O_RDONLY) = 3 [28330] - java bits ?
+ required by vcl's Java integration foo ...
+ could we de-couple that ?
0.000038 0.61595 open("/usr/lib/libxml2.so.2", O_RDONLY) = 3 [28330] - where do we parse xml this early ?
+ Add timing to registry read / cache bits etc.
+ why are we loading libavmedia*.so on startup ?
+ check all '.res' files we use & why ...
[ what triggers their use ? ]
Thoughts:
+ lots of resource file reading
+ could we mmap that ?
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