[DC LoCo] Java slowness, solved, sort of

Greg Reagle greagle at citidc.com
Mon Dec 7 17:40:17 GMT 2009

I tried various alternatives (openjdk, icedtea, gcj, etc.) to sun-java6-jre on Ubuntu 9.10 to no avail.

I installed Ubuntu 8.04 (LTS) with sun-java6-jre and Java is significantly less slow.  It is not speedy, but I can live with it.

greg reagle | computer technician, system administrator | community it innovators - CITI | 202-234-1600 ext. 353

> -----Original Message-----
> From: Greg Reagle
> Sent: Thursday, November 19, 2009 12:45 PM
> To: DCLoCo
> Subject: Java very slow in Ubuntu 9.10
> Hi everybody.  I installed Ubuntu 9.10 recently and Java is super slow.
> What is going on?  Have you experienced this problem too?
> Here are the details:
> I installed sun-java6-bin and sun-java6-jre (et al).  CPU of Ubuntu
> computer is Intel(R) Pentium(R) 4 CPU 2.00GHz with 512 MB of RAM.
> According to the GNOME System Monitor panel applet: RAM is not
> overloaded, swap is not being used, disk activity is very low.  The
> Windows computer I mention for comparison is Intel Xeon 2.4 GHz,
> Windows XP, also with Java 6.
> I downloaded GTD-Free 0.4.3 from http://sourceforge.net/projects/gtd-
> free/files/gtd-free/0.4.3/gtd-free-0.4.3.jar/download and ran it with
> "java -jar gtd-free-0.4.3.jar".  It takes 2-3 seconds just to switch
> between tabs and sends the CPU utilization up to 100%!!  This same
> program is speedy on my Windows XP computer.
> Also, Freemind is very slow too and sends the CPU to 100% just clicking
> on the menus or opening and closing branches.  Freemind 0.7 comes
> standard with Ubuntu but I used the newer version at
> http://eric.lavar.de/comp/linux/debian/ubuntu.  Again, this program is
> speedy on my Windows XP computer.
> I read complaints regarding slowness of Java with earlier versions of
> Ubuntu that said that switching to Java 5 made things faster, but Java
> 5 doesn't seem to be available for Ubuntu 9.10.
> --
> greg reagle | system administrator | 202-234-1600 ext. 353 |
> greagle at citidc.com
> community it innovators (citi) | Twitter: @CommunityIT

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