Re: [Jython-users] jython-2.1b1 startup time

[Jan W. <j.w...@sc...>]

On Mon, Dec 10, 2001 at 09:16:25PM +0000, Finn Bock wrote:
> [Stefan]
>=20
> >Hi,
> >
> >I note a big difference in startup time between
> >Jython-2.1a3 and Jython-2.1b1 (using the same JVM
> >and same registry).

I also noticed it on Unix systems:
Linux (MSC.2001Aug on i686)

ian@leo tmp > time jython -c 'import sys; sys.exit()'

real    0m4.859s
user    0m3.370s
sys     0m0.100s
ian@leo tmp > time ~/jython-2.1a3/jython -c 'import sys; sys.exit()'

real    0m1.964s
user    0m1.740s
sys     0m0.090s

DEC Alpha OSF1 alpha V4.0
ian@alpha 200gui > time jython -c 'import sys; sys.exit()'

real    0m10.416s
user    0m9.703s
sys     0m0.383s
ian@alpha 200gui > time ~/jython-2.1a3/jython -c 'import sys; sys.exit()'

real    0m2.498s
user    0m2.072s
sys     0m0.313s

>=20
> Which JVM?
Linux:
ian@leo tmp > java -version
java version "1.3.1_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1_01)
Java HotSpot(TM) Client VM (build 1.3.1_01, mixed mode)

Alpha:
ian@alpha 200gui > java -version
java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition
Classic VM (build 1.3.0-1, native threads, jit)


> Maybe its scanning CLASSPATH jar files. Do you have write access to the
> "cachedir" directory?
Yes, and it has not scanned the jar files, because I called it twice and =
took
only the second timing.
>=20
> If your JVM have some kind of verbose options, try running with
> different kind of verbosity enabled. Maybe it will give some clues abou=
t
> what it is doing in that time.
I have attached two logfiles, produced with=20
scjava -verbose -Dpython.home=3D"/home/ian/jython-2.1a3" -classpath "/hom=
e/ian/jython-2.1a3/jython.jar:$CLASSPATH" "org.python.util.jython" >loga3
resp.
scjava -verbose -Dpython.home=3D"/usr/local/jython-2.1b1" -classpath "/us=
r/local/jython-2.1b1/jython.jar:$CLASSPATH" "org.python.util.jython" >log=
b1

CLASSPATH is /home/ian/venus/200gui/gui/jar/xmlrpc-a.jar in both cases.

The b1 loads a lot (36) more libraries than the a3, this is probably caus=
ing the
delay.

Cheerio,
--=20
J.W...@sc...  -  Fon +4970719457-257 Fax-211
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