RFT: openoffice.org tweaks to speed up startup

[Peter van Egdom]

Hello,

I tried the "openoffice.org-1.1.0-3.1" version available from
ftp://people.redhat.com/jakub/openoffice.org/ and did some unscientific
benchmarking.

I used the "time" command to benchmark the loading of OpenOffice.org
Writer. Each time Writer had completed loading I (as quickly as I could)
quit Writer.

After this I started Writer a second time to see how the caching
mechanism of Linux influenced startup time.

My system is a Intel Pentium 4 CPU 2.40GHz with 512 MB and my operating
system is Fedora Core release 0.95 with prelink-0.3.0-8 and
kernel-2.4.22-1.2088.nptl.src.rpm.

First, here are some numbers with the original (Fedora Core release
0.95) "openoffice.org-1.1.0-2" :

Fresh reboot (in KDE)
---------------------
1st. startup (from konsole : "time oowriter")	real    0m12.172s
						user    0m2.540s
						sys     0m0.220s

2nd. startup (from konsole : "time oowriter")	real    0m5.021s
						user    0m2.490s
						sys     0m0.170s

I then de-installed the old openoffice.org and installed
openoffice.org-1.1.0-3.1 along with db4-4.1.25-13 from Rawhide (which
was a dependency for this build of openoffice.org).


And here are some numbers with the new build (openoffice.org-1.1.0-3.1).

Benchmark with soffice1.bin :
("ln -sf soffice1.bin /usr/lib/openoffice/program/soffice.bin")

Fresh reboot (in KDE)
---------------------
1st. startup (from konsole : "time oowriter")	real    0m12.573s
						user    0m3.420s
						sys     0m0.430s

2nd. startup (from konsole : "time oowriter")	real    0m5.359s
						user    0m2.450s
						sys     0m0.190s


Benchmark with soffice2.bin :
("ln -sf soffice2.bin /usr/lib/openoffice/program/soffice.bin")

Fresh reboot (in KDE)
---------------------
1st. startup (from konsole : "time oowriter")	real    0m10.387s
						user    0m1.380s
						sys     0m0.200s

2nd. startup (from konsole : "time oowriter")	real    0m3.639s
						user    0m1.330s
						sys     0m0.130s


Benchmark with soffice3.bin :
("ln -sf soffice3.bin /usr/lib/openoffice/program/soffice.bin")

Fresh reboot (in KDE)
---------------------
1st. startup (from konsole : "time oowriter")	real    0m9.882s
						user    0m1.290s
						sys     0m0.200s

2nd. startup (from konsole : "time oowriter")	real    0m3.675s
						user    0m1.320s
						sys     0m0.140s


It seems that with the tweaks Jakub did to OpenOffice.org the startup
time has decreased with a few seconds on my machine, which is nice.


ps. I see some errors in "/var/log/prelink.log" :

Prelinking /usr/lib/openoffice/program/getstyle-gnome /usr/sbin/prelink:
/usr/lib/openoffice/program/getstyle-gnome: Not enough room to add
.dynamic entry

Prelinking /usr/lib/openoffice/program/msgbox-gnome /usr/sbin/prelink:
/usr/lib/openoffice/program/msgbox-gnome: Not enough room to add
.dynamic entry


Op za 25-10-2003, om 10:14 schreef Jakub Jelinek:

<snip>

> Hi!
> 
> I've done some tweaks to OO.o to make it more prelink-friendly
> (and thus to start up faster).
> ftp://people.redhat.com/jakub/openoffice.org/
> contains openoffice.org-1.1.0-3.1 package, with 2 differences
> against 1.1.0-3 in rawhide:
> 
> 1) there are 3 variants of the /usr/lib/openoffice/program/soffice.bin
>    binary (the actual OOo program), soffice.bin is a symlink to one of
>    them:
>    soffice1.bin should be the same as soffice.bin in 1.1.0-3
>    soffice2.bin instead indirectly links against another > 40 libraries
> 		which are ALWAYS dlopened when soffice starts
>    soffice3.bin is like soffice2.bin, but unlike soffice2.bin, it has
> 		all DT_NEEDED tags directly in the binary, while
> 		soffice2.bin is just crt files and all the binary's
> 		code plus most of the DT_NEEDED tags moved to
> 		new shared library

<snip>

Regards,

-- 
Peter van Egdom <p.van.egdom at chello.nl>