Re: Performance comparison of Java (and .NET) runtimes

2004-10-19 Thread Matt Avery
te: I have updated a web page showing results of performance measurement of various Java runtimes. Performance Comparison of Java/.NET Runtimes (Oct 2004) http://www.shudo.net/jit/perf/ The benchmarks on the page are mainly compute intensive and not server-side ones: SPEC JVM98, SciMark 2.0, Li

Performance comparison of Java (and .NET) runtimes

2004-10-18 Thread shudo
I have updated a web page showing results of performance measurement of various Java runtimes. Performance Comparison of Java/.NET Runtimes (Oct 2004) http://www.shudo.net/jit/perf/ The benchmarks on the page are mainly compute intensive and not server-side ones: SPEC JVM98, SciMark 2.0

Java performance issues with PXA255

2004-02-10 Thread shaun . k . brandt
(I've included some results from the AIM Independent Resource Benchmark as well as the startup logs from the kernel), and overall system performance appears to be fine. However, Java performance, especially Swing, is horrible. When running a Swing application (the Stylepad demo included

AWT Performance for graphics and j2d

2003-03-04 Thread Victor Romero
      Actually I’m writing a fullscreen game on windows with Java, Its going to run on little embedded machines so I checked Linux before WinXP, but it runs really really slower than linux, in a P2 2ghz I get on windows 80 fps, and in Linux ( same computer ) 33 fps, I’m trying as m

Re: Java thread performance

2002-11-20 Thread Narendra Sankar
I am actually running gentoo linux with glibc 2.3.1 which does not have the LD_ASSUME_KERNEL option. From what I know, this forces glibc 2.1.3 (on Redhat) to be used. However gentoo does not support this from what I can tell. The system breaks when this variable is used. On a performance note

Re: Java thread performance

2002-11-20 Thread Marco Trevisan
Hi, Remember that IBM-jvm needs the following environment variable: LD_ASSUME_KERNEL=2.2.5 You could try this and see if page faults continue arising. Regards, Marco Trevisan Narendra Sankar wrote: hi I ran a very simple thread creation benchmark on various vms to find out how useful my

Java thread performance

2002-11-12 Thread Narendra Sankar
+0k 0+0io 2272pf+0w time /opt/sun-jdk-1.4.1.01/bin/java -server Loop 32768 7.830u 6.730s 0:14.02 103.8%0+0k 0+0io 2295pf+0w I see that the IBM jvm gets the best performance, but has the most number of page faults. So the real world time is the highest. Can anyone explain this? Also why is the

Re: Java Performance

2002-11-07 Thread Matt Avery
I would be more than happy to help with builds of the Blackdown JVM. What do we have to do to get CVS access? Narendra Sankar wrote: Hi Everyone Since I discovered Jedit, I have been looking into jvm performance, specifically on linux as that is my platform of choice. I love jedit and it has

Java Performance

2002-11-07 Thread Narendra Sankar
Hi Everyone Since I discovered Jedit, I have been looking into jvm performance, specifically on linux as that is my platform of choice. I love jedit and it has all the features for me - but I primarily develop in C and C++. One of the problems I have seen is the slow performance on linux. I

RE: Measuring MYSQL Performance

2001-12-28 Thread Veda Narayanan
performance analysis tool for mysql.   Reg Ved -Original Message-From: Ramasubramanian [mailto:[EMAIL PROTECTED]]Sent: Wednesday, December 26, 2001 4:47 AMTo: [EMAIL PROTECTED]Subject: Measuring MYSQL Performance Hi,         Is there any way by which the performance of MYSQL could

Measuring MYSQL Performance

2001-12-26 Thread Ramasubramanian
Hi,         Is there any way by which the performance of MYSQL could be measured in JDBC for Linux ?   Regards Rams - Original Message - From: Ramasubramanian To: [EMAIL PROTECTED] Sent: Monday, December 24, 2001 4:56 PM Subject: Performance Analysis Tool in jdk1.1.8 Hi All

Performance Analysis Tool in jdk1.1.8

2001-12-24 Thread Ramasubramanian
Hi All,             Can u please suggest a performace analysis tool compliant for jkd1.1.8 under Linux which would give me information reg. the memory and CPU utilization, number of threads spawned etc. ???             I find lots of tools that are compliant with the Java 2 platform but no

Re: Brutal X-Windows performance of Swing apps on slow links

2001-03-14 Thread shkanth
ouse events. Other X > > > > applications > > > > including emacs and Mozilla are quite usable over the same link. What is it > > > > about > > > > Swing and/or AWT that causes this horrible performance. Is there anything > > > > that can &

Re: Brutal X-Windows performance of Swing apps on slow links

2001-03-09 Thread Andreas Micklei
On Thu, Mar 08, 2001 at 09:36:11PM -0800, [EMAIL PROTECTED] wrote: > do you reconize me you asses its me > > YOURS SINCERELY > Shivakanth $ cat >>~/.procmailrc :0 * ^From [EMAIL PROTECTED] idiots :0 * ^From: [EMAIL PROTECTED] idiots :0 * ^From: "Mr.Y.SHIVAKANT" <[EMAIL PROTECTED]> idiots --

Re: Brutal X-Windows performance of Swing apps on slow links

2001-03-08 Thread shkanth
t; machine to another across an ISDN line. Performace is horrible, it takes a > > > long > > > time to open windows, display menus and react to mouse events. Other X > > > applications > > > including emacs and Mozilla are quite usable over the same link. What is it &g

Re: Brutal X-Windows performance of Swing apps on slow links

2001-03-06 Thread Dan Kegel
"Martin, Stephen" wrote: > > > See the suggestions in > > http://developer.java.sun.com/developer/bugParade/bugs/4204845.html > > Do any of those help? > > - Dan > > This and all the rest of the replies have been excellent. Clearly Sun is > aware of the problem and from reading the posts attache

Re: Brutal X-Windows performance of Swing apps on slow links

2001-03-06 Thread Joi Ellis
On Tue, 6 Mar 2001, Jesus M. Salvo Jr. wrote: > SUn's Bug Parade did say that Swing on remote X IS slow. The workaround > is not to use double-buffering: > > http://developer.java.sun.com/developer/bugParade/bugs/4204845.html Something else to do is to use a stream compressor to compress the d

RE: Brutal X-Windows performance of Swing apps on slow links

2001-03-06 Thread Martin, Stephen
> See the suggestions in > http://developer.java.sun.com/developer/bugParade/bugs/4204845.html > Do any of those help? > - Dan This and all the rest of the replies have been excellent. Clearly Sun is aware of the problem and from reading the posts attached to the bug it is clear that the user com

Re: Brutal X-Windows performance of Swing apps on slow links

2001-03-06 Thread Jesus M. Salvo Jr.
s, display menus and react to mouse events. Other X > > applications > > including emacs and Mozilla are quite usable over the same link. What is it > > about > > Swing and/or AWT that causes this horrible performance. Is there anything > > that can > > be done about it.

Re: Brutal X-Windows performance of Swing apps on slow links

2001-03-06 Thread Dan Kegel
cations including emacs and Mozilla are quite usable over the same > link. What is it about Swing and/or AWT that causes this horrible > performance. Is there anything that can be done about it. See the suggestions in http://developer.java.sun.com/developer/bugParade/bugs/4204845

Re: Brutal X-Windows performance of Swing apps on slow links

2001-03-06 Thread Martin Schröder
On 2001-03-06 15:48:55 +0100, Martin Schröder wrote: > On 2001-03-06 08:35:32 -0500, Martin, Stephen wrote: > > Swing and/or AWT that causes this horrible performance. Is > > there anything that can be done about it. > > Use jdk 1.x s/1\.x/1\.1\.x/ Be

Re: Brutal X-Windows performance of Swing apps on slow links

2001-03-06 Thread Nathan Meyers
orrible, it takes a > long > time to open windows, display menus and react to mouse events. Other X > applications > including emacs and Mozilla are quite usable over the same link. What is it > about > Swing and/or AWT that causes this horrible performance. Is there anything >

Re: Brutal X-Windows performance of Swing apps on slow links

2001-03-06 Thread Martin Schröder
On 2001-03-06 08:35:32 -0500, Martin, Stephen wrote: > Swing and/or AWT that causes this horrible performance. Is > there anything that can be done about it. Use jdk 1.x Best regards Martin -- Martin Schröder, [EMAIL PROTECTED] ArtCom GmbH, Grazer Straß

Brutal X-Windows performance of Swing apps on slow links

2001-03-06 Thread Martin, Stephen
use events. Other X applications including emacs and Mozilla are quite usable over the same link. What is it about Swing and/or AWT that causes this horrible performance. Is there anything that can be done about it. Steve -- To U

Re: Java performance check

2000-10-11 Thread Craig Rodrigues
On Wed, Oct 11, 2000 at 02:11:51PM +0300, Ganesh Sivaraman wrote: > > Is there any kind of JVM performace check tool, which can show the JProbe, http://www.klgroup.com/jprobe/ -- Craig Rodrigues http://www.gis.net/~craigr [EMAIL PROTECTED] --

Java performance check

2000-10-11 Thread Ganesh Sivaraman
Hi, I had posted this a while ago. I am reposting with some hope that I will be able to get some response this time. Is there any kind of JVM performace check tool, which can show the applications memeory consumption processor load and other parameters. It will be great to have this in Java as

Re: Performance evaluation of JIT compilers

2000-09-28 Thread Ganesh Sivaraman
Hi, Have you done any performance test for any Java graphical applications for Linux. What I am interested is to find out the performance of Linux with X and Linux without X. So is there any performance software that can be used for this. This means that the progs should be in Java. I have tried

Performance evaluation of JIT compilers

2000-09-25 Thread SHUDO Kazuyuki
Hi folks, I've measured performance of JIT compilers which work on Linux. If you're interested in, please see http://www.shudo.net/jit/perf/ Evaluated runtime systems are IBM JITC (in IBM JDK 1.3 and 1.1.8), HotSpot Client and Server VM in Sun JDK 1.3, JIT v3 in Kaffe 1.0.6, JBuil

Re: high performance I/O?

2000-05-13 Thread Matt Welsh
Miles Sabin <[EMAIL PROTECTED]> writes: > Agreed. One big headache is the fact that asynchronous IO > (POSIX or otherwise) is typically going to require that buffers > be at fixed addresses, ... > I guess that in principle it ought to be possible to tweak > JVMs to special-case a priviledged clas

Re: high performance I/O?

2000-05-10 Thread Christopher Smith
would be REALLY nice. Given Java's bounds checking though, at best it'd have to be some kind of struct, rather than a raw pointer. > Also, in the case of GetArrayElements(), the JVM does not > promise not to copy the data -- and copying kills your performance. The JVM has the option

Re: high performance I/O?

2000-05-10 Thread Matt Welsh
s a Java object - not the other way around. What you are talking about is getting a C pointer to a Java object. Not the same thing! Also, in the case of GetArrayElements(), the JVM does not promise not to copy the data -- and copying kills your performance. Matt Welsh ---

Re: high performance I/O?

2000-05-10 Thread Christopher Smith
On Wed, May 10, 2000 at 01:10:20PM +0100, Miles Sabin wrote: > Matt Welsh wrote, > I guess that in principle it ought to be possible to tweak > JVMs to special-case a priviledged class of byte[]s to allow > them to be pinned for an extended interval without completely > screwing GC, but I'm not at

RE: high performance I/O?

2000-05-10 Thread Miles Sabin
Matt Welsh wrote, > My personal feeling is that there is a lot that will need to > happen at both the Java and the O/S level to get great I/O > performance. I am not sure I agree with many of the > discussions in the linux-kernel list that the right way to > get high I/O bandw

Re: high performance I/O?

2000-05-09 Thread Dan Kegel
Expert Group for JSR 51 (the new I/O APIs for the Java > platform), so hopefully good things will happen there! Yes, it should be interesting! > My personal feeling is that there is a lot that will need to happen at > both the Java and the O/S level to get great I/O performance. I am n

Re: high performance I/O?

2000-05-09 Thread Matt Welsh
Hi Dan, > Anyone here interested in getting Java to handle heavy I/O nicely? Exactly the topic of my research :-) You should check out Jaguar, a system I have developed to do high-performance networking and I/O in Java. It's at http://www.cs.berkeley.edu/~mdw/proj/jagu

Re: high performance I/O?

2000-05-09 Thread Juergen Kreileder
> Dan Kegel writes: Dan> Anyone here interested in getting Java to handle heavy I/O Dan> nicely? I'm personally interested in insane things like Dan> trying to write an ftp daemon that can handle 5000 Dan> simultaneous clients in Java, but there are probably more Dan> san

high performance I/O?

2000-05-09 Thread Dan Kegel
Anyone here interested in getting Java to handle heavy I/O nicely? I'm personally interested in insane things like trying to write an ftp daemon that can handle 5000 simultaneous clients in Java, but there are probably more sane examples. I have a few notes on the subject at http://www.ke

Re: TCP performance issues

2000-03-30 Thread John Rousseau
On Mar 29, 2000, Ekkehard Kraemer wrote: > Hallo John, > > JR>I'm thinking that the kernel TCP connection queues are filling up and > JR>further requsts are getting dropped, but at 20? > > Did you check ulimit (file handles)? > > Did you try 'lsof | grep TCP'? Maybe it shows thousands of "

Re: TCP performance issues

2000-03-29 Thread Chris Kakris
John Rousseau wrote: > > I'm doing some performance testing on our server and what I'm seeing > is a little disappointing. > > > > I'm thinking that the kernel TCP connection queues are filling up > and further requsts are getting dropped, but at 20? &g

TCP performance issues

2000-03-29 Thread John Rousseau
I'm doing some performance testing on our server and what I'm seeing is a little disappointing. We're running JDK1.2.2-RC4 (native threads) on several different machines. I see almost identical behavior running on both of the following machines: quad 200MHz PII, 2GB memory, glib

Re: TCP performance issues

2000-03-29 Thread Ekkehard Kraemer
Hallo John, JR>I'm thinking that the kernel TCP connection queues are filling up and JR>further requsts are getting dropped, but at 20? Did you check ulimit (file handles)? Did you try 'lsof | grep TCP'? Maybe it shows thousands of "zombie" TCP/IP connections. Which JDBC driver are you using

Re: TCP performance issues

2000-03-29 Thread John Rousseau
On Thursday Mar 30, 2000, Peter Schuller wrote: > > Our application server starts rejecting TCP connections (actually, > > the OS does, our app never sees these rejected requests) at about 20 > > simultaneous requests. The load average on the system runs a little > > high (5-10) when requests st

Re: Terrible native thread performance

2000-01-22 Thread Nathan Meyers
. This takes particularly much time. Generally, the > -->> same Java application (both AWT and Swing) performs very poorly under > -->> JDK1.2 RC3. With jdk1.1.x performance is very good. > --> > -->Right. The JDK1.2 Graphics2D performance has lots of problems, one

Re: Terrible native thread performance

2000-01-22 Thread Marek Gmyrek
e -->> same Java application (both AWT and Swing) performs very poorly under -->> JDK1.2 RC3. With jdk1.1.x performance is very good. --> -->Right. The JDK1.2 Graphics2D performance has lots of problems, one of -->them being excessive numbers of repaints... especially when you dr

Re: Terrible native thread performance

2000-01-21 Thread Nathan Meyers
27; I meant a Java Frame (Window). So, eg. I have the main > frame of my aplication an a dialog box. Moving dialog makes the main > frame repaint itself. This takes particularly much time. Generally, the > same Java application (both AWT and Swing) performs very poorly under > JDK1.2

Re: Terrible native thread performance

2000-01-21 Thread Marek Gmyrek
tion an a dialog box. Moving dialog makes the main frame repaint itself. This takes particularly much time. Generally, the same Java application (both AWT and Swing) performs very poorly under JDK1.2 RC3. With jdk1.1.x performance is very good. So the problem should not have

Re: Terrible native thread performance

2000-01-20 Thread Chris Kakris
Marek Gmyrek wrote: > > I use the same system (RH6.1) with Blackdown JDK1.2 RC3 and have the same > observations. Both native and green versions are very slowly, especially > with GUI stuff, when compared to jdk1.1.8 (v1). > > Processor utilization is not so bad, until I move a window and a wind

Re: Terrible native thread performance

2000-01-20 Thread Artur Biesiadowski
On Thu, 20 Jan 2000, Marek Gmyrek wrote: > observations. Both native and green versions are very slowly, especially > with GUI stuff, when compared to jdk1.1.8 (v1). > > Processor utilization is not so bad, until I move a window and a window > in background has to repaint itself. Repainting take

Re: Terrible native thread performance

2000-01-20 Thread Marek Gmyrek
ork 15 times. Of these That is ok. This is the result of thread implementation on Linux. -->threads four or five of them just hammer the CPU, leaving the whole -->machine at a crawl. Actual performance of our Java GUI isn't too bad, but -->it's no where near where it should be.

Re: Terrible native thread performance

2000-01-20 Thread Oliver Koell
Daniel Stux wrote: > > Hi folks, > > I've just installed two versions of the JDK1.2.2 for linux: Sun's RC2, and > Blackdown's RC3. I am experiencing the wierdest behavior I have ever seen > for a JDK. > I didn't see someone else mentioning this: did you try IBM's JDK? /Oliver --

Re: Terrible native thread performance

2000-01-19 Thread Jeff Galyan
5 times. Of these > threads four or five of them just hammer the CPU, leaving the whole > machine at a crawl. Actual performance of our Java GUI isn't too bad, but > it's no where near where it should be. > > Switch to green threads. With Sun's JDK it's

Re: Terrible native thread performance

2000-01-19 Thread Jacob Nikom
in native threads is > > absolutely crippling. There seems to be a serparate JDK process ID > > for each running thread, or otherwise something is casuing it to > > fork 15 times. Of these threads four or five of them just hammer the > > CPU, leaving the whole machine at a crawl. Act

Re: Terrible native thread performance

2000-01-19 Thread Nathan Meyers
; thread, or otherwise something is casuing it to fork 15 times. On Linux, threads have separate entries in the process table. The Inprise JDK you're getting from Sun has a better JIT, which could explain your green-threads performance differences. As for native threading, the Sun/Inprise ver

Re: Terrible native thread performance

2000-01-19 Thread Paolo Ciccone
; thread, or otherwise something is casuing it to fork 15 times. Of these > threads four or five of them just hammer the CPU, leaving the whole > machine at a crawl. Actual performance of our Java GUI isn't too bad, but > it's no where near where it should be. The thred model of L

Re: Terrible native thread performance

2000-01-19 Thread Jonathan Doughty
asuing it to > fork 15 times. Of these threads four or five of them just hammer the > CPU, leaving the whole machine at a crawl. Actual performance of our > Java GUI isn't too bad, but it's no where near where it should be. You are seeing an artifact of the Linux threading model: nati

Terrible native thread performance

2000-01-19 Thread Daniel Stux
utely crippling. There seems to be a serparate JDK process ID for each running thread, or otherwise something is casuing it to fork 15 times. Of these threads four or five of them just hammer the CPU, leaving the whole machine at a crawl. Actual performance of our Java GUI isn't too bad, but it&#

Re: heap space and performance

2000-01-08 Thread Peter Schuller
> Heap consumption and performance are real problems in Java. But doesn't the JSL guarantee that an OutOfMemoryException is never thrown until all non-reachable objects have been GC:ed? Why would the JVM though an OutOfMemoryException without first doing a full GC? -- / Peter Schul

Re: heap space and performance

2000-01-06 Thread richard johnson
On Thu, 06 Jan 2000, Juergen Kreileder wrote: > You should update your glibc first, the LinuxThreads library is still > work in progress. E.g. the original glibc-2.1.2 release didn't pass > sigcontext to user handlers, this was fixed in glibc-2.1.2 CVS tree as > of 1999/10/24 (this is the versio

RE: heap space and performance

2000-01-06 Thread Ekkehard Kraemer
Hallo Michael, MEM>that is good news. MEM>i did alot of the same kind of testing. MEM>i did "new Integer[100]" MEM>and i never ran out of heap. I did THAT one, too. I didn't run out of heap, too. But when using "new Integer(0)" instead, it crashes - mind you, it doesn't run out of heap, tho

Re: heap space and performance

2000-01-06 Thread Juergen Kreileder
> Michael E Moores writes: Michael> ah, back to the same old problem. maybe i should get a phd in Michael> compilers/linkers. Michael> i suppose my best bet is to start by compiling everything Michael> on the box with the same library path; including the jdk. You should upda

Re: heap space and performance

2000-01-06 Thread Michael E. Moores
ah, back to the same old problem. maybe i should get a phd in compilers/linkers. i suppose my best bet is to start by compiling everything on the box with the same library path; including the jdk. so when i dive into compiling the jdk when RC4 releases, is the latest source available to do it?

RE: heap space and performance

2000-01-06 Thread Michael E. Moores
that is good news. i did alot of the same kind of testing. i did "new Integer[100]" and i never ran out of heap. again, i want to look at what libraries your jdk is depending on. i may have to point my cheap finger at glibc. i have been using RC2/glibc1.2.1 cause my 3rd party JNI interface cr

Re: heap space and performance

2000-01-06 Thread Juergen Kreileder
> Michael E Moores writes: Michael> that is a valuable (non-political.. hee hee) Michael> data point ekkehard. Michael> so you must be using glibc2.1.2? Michael> i am using mandrake 6.1, which uses glibc2.1.1, Michael> so i have also been using JDK 1.2 RC2 to be compa

RE: heap space and performance

2000-01-06 Thread Michael E. Moores
that is a valuable (non-political.. hee hee) data point ekkehard. so you must be using glibc2.1.2? i am using mandrake 6.1, which uses glibc2.1.1, so i have also been using JDK 1.2 RC2 to be compatible. i wonder if glibc is causing some of the problesm? i am also seeing some intermittent thre

RE: heap space and performance

2000-01-06 Thread Edson Carlos Ericksson Richter
heap space and performance Hallo Edson Carlos Erickss, some results for the Blackdown JDK 1.2.2 RC 3, native threads, sunwjit: It does at least 80.000 loops without problems (I canceled it afterwards); rt.free() is constantly 1048568 Bytes; the effective memory used by the program is constantly

RE: heap space and performance

2000-01-06 Thread Ekkehard Kraemer
Hallo Edson Carlos Erickss, some results for the Blackdown JDK 1.2.2 RC 3, native threads, sunwjit: It does at least 80.000 loops without problems (I canceled it afterwards); rt.free() is constantly 1048568 Bytes; the effective memory used by the program is constantly 4520 K (+1024 K shared). M

RE: heap space and performance

2000-01-05 Thread Ekkehard Kraemer
Hello Michael, MEM>i think the jvm/jdk has a big leak with one or more of the MEM>classes used. I'm running the Blackdown JDK (1.2-RC3, with sunwjit and native threads) here with very good results. I have only one (non-trivial) application running, and it doesn't show your problem. It uses socke

RE: heap space and performance

2000-01-05 Thread Michael E. Moores
FYI i am using native threads. also, the garbage collection loop ONLY tells the system we would like to encourage a GC pass. i noticed that this DID make the program have less periodic slowness.. At 08:40 PM 1/5/00 -0200, Edson Carlos Ericksson Richter wrote: >For all: I'm doing a comparision b

RE: heap space and performance

2000-01-05 Thread Michael E. Moores
E. Moores >Sent: quarta-feira, 5 de janeiro de 2000 17:40 >To: Edson Carlos Ericksson Richter >Cc: [EMAIL PROTECTED] >Subject:RE: heap space and performance > >so you can also see the heap get used up >with the win32 JDK? >i don't see how the blackdown

RE: heap space and performance

2000-01-05 Thread Edson Carlos Ericksson Richter
For all: I'm doing a comparision based on report from Michael E. Moores using the same program (see bellow) and anotating reports about memory usage (and, of course, stability). Michael reported a crash after 45000 loops in Linux JDK1.2.2 ("linux 2.2, blackdown 1.2 (glibc 1.2.1)"). My comparis

RE: heap space and performance

2000-01-05 Thread Edson Carlos Ericksson Richter
er Cc: [EMAIL PROTECTED] Subject:RE: heap space and performance so you can also see the heap get used up with the win32 JDK? i don't see how the blackdown JDK can be used for programs that persist for long periods. i tried several versions of that code. i agree you will al

RE: heap space and performance

2000-01-05 Thread Edson Carlos Ericksson Richter
C in Linux are not ok. Edson Richter -- From: Michael E. Moores Sent: quarta-feira, 5 de janeiro de 2000 17:40 To: Edson Carlos Ericksson Richter Cc: [EMAIL PROTECTED] Subject:RE: heap space and performance so you can also see the heap get used up with the win32 JDK? i

RE: heap space and performance

2000-01-05 Thread Michael E. Moores
so you can also see the heap get used up with the win32 JDK? i don't see how the blackdown JDK can be used for programs that persist for long periods. i tried several versions of that code. i agree you will always get a performance benefit by NOT calling object contructors inside of a

RE: heap space and performance

2000-01-05 Thread Edson Carlos Ericksson Richter
Heap consumption and performance are real problems in Java. But some great pratices in coding solve (or amenizes) the problem: 1) Don't repeat declaration of common used variables: 2) Create a thread in your main class taking a "forced garbage collection". See the following pro

heap space and performance

2000-01-04 Thread Michael E. Moores
(default 16MB), and my loop time was about 100 times every 6 seconds, and the CPU was at 49%. my questions are: 1. why does performance go down so much when the heap size goes up? are we taking up lots of time sweeping through the heap? 2. why does the jvm max out the heap when my

Availability of Colt 1.0 Beta 4 - Open Source Libraries for High Performance for Scientific and Technical Computing in Java

1999-11-30 Thread Wolfgang HOSCHEK
This is to announce the release of the Colt V1.0 Beta 4 distribution. Check out the online documentation and/or download at http://nicewww.cern.ch/~hoschek/colt/index.htm Scope = The Colt distribution provides an open source infrastructure for scalable scientific and technical computing in J

Does clipping improves performance of graphics drawing?

1999-11-10 Thread Eric Chao
Hi, I guess the subject says all. Does clipping a large image to a small clipping area improves performance of graphics drawing? -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Troubl

Re: performance

1999-10-19 Thread Ted Neward
No--don't do that. DON'T convince yourself that you need to avoid using a particular language feature "because of its impact on performance". Use the language feature, profile the app, THEN worry about performance. There are dozens of things you can do to bette

performance

1999-10-19 Thread 陈峰
hi linux java fan  I want to know if the finally will affect the performace of the program I know that if the catch happen the program will affect the performance ,but I don't konw the finally will do what                 Thanks                     yours simple fan

Re: JDK 1.2.2 Performance

1999-06-24 Thread Anonymous
[EMAIL PROTECTED] wrote: >Things will improve -- they've already started to improve -- but not as >fast as you'd like. The reality of the Linux revolution is that manning >the barricades gives you the responsibility to help make things better >and forfeits you the right to bitch and moan about the

Re: JDK 1.2.2 Performance

1999-06-22 Thread Anonymous
Nick Lawson wrote: > > Paul Mclachlan wrote: > > > --- Nick Lawson <[EMAIL PROTECTED]> wrote: > > > > > I thought Swing was slow on Windows... I appreciate that JDK > > > 1.2.2 > > > is still beta, but i'm having serious performance pro

Re: JDK 1.2.2 Performance

1999-06-22 Thread Anonymous
Paul Mclachlan wrote: > --- Nick Lawson <[EMAIL PROTECTED]> wrote: > > > I thought Swing was slow on Windows... I appreciate that JDK > > 1.2.2 > > is still beta, but i'm having serious performance problems > > with my > > apps on linux, where I

Re: JDK 1.2.2 Performance

1999-06-22 Thread Anonymous
Paul Mclachlan wrote: > --- Nick Lawson <[EMAIL PROTECTED]> wrote: > > > I thought Swing was slow on Windows... I appreciate that JDK > > 1.2.2 > > is still beta, but i'm having serious performance problems > > with my > > apps on linux, where I

Re: JDK 1.2.2 Performance

1999-06-22 Thread Anonymous
--- Nick Lawson <[EMAIL PROTECTED]> wrote: > I thought Swing was slow on Windows... I appreciate that JDK > 1.2.2 > is still beta, but i'm having serious performance problems > with my > apps on linux, where I don't with the other os. No, this is pretty much what

JDK 1.2.2 Performance

1999-06-22 Thread Anonymous
Hi, I'm new to linux (but not java) so maybe I'm doing something wrong and you guys can point me in the right direction. I thought Swing was slow on Windows... I appreciate that JDK 1.2.2 is still beta, but i'm having serious performance problems with my apps on linux, where I

Java for Linux performance

1999-06-19 Thread Anonymous
Is OpenSpot available for Linux? I have a server-side Java app that needs to perform well and I would like to run it on Linux. It is a console app with no graphics. Any suggestions would be greatly appreciated ... Andy --

Performance problems with jdk1.2v2.

1999-06-06 Thread Bob Cadenza
Well I have been using the jdk1.2v2 glibc2.1 version for about a day now and have these observations. Things like the demo/applet/Java2Demo run really slow. On the same system in windows using the win32 jdk1.2 I get about 30fps but in linux I get about 2fps. Also twice the new jdk has caused

Re: JARs and performance...

1999-05-06 Thread papiraki
Hey, I think splitting this file into more than one is a VERY good idea to start with. There is a programm called fastjar that is available from freshmeat.net. I did not use it myself, but since it is written in good old native C (or is it C++?) it MUCH more performant. I think y

Re: JARs and performance...

1999-05-06 Thread Ted Neward
bean. But for the performance part the >applet is the big concern. Such a big jar, start off with big problems. > True, but I would argue that the actual performance of downloading the entire jar onto the local VM each time the app starts is probably not that big of a hit, and once it's ther

Re: JARs and performance...

1999-05-06 Thread Ted Neward
>> From the context of what you're saying, I'm guessing that you're running a >> Java application and not an applet on the client. What I can suggest is >> that you write a custom ClassLoader that uses java.net.URL to connect to a >> given web server, check dates (against the .jar in your local pa

Re: JARs and performance...

1999-05-06 Thread Louis-David Mitterrand
On Thu, May 06, 1999 at 10:27:41AM -0700, Ted Neward wrote: > From the context of what you're saying, I'm guessing that you're running a > Java application and not an applet on the client. What I can suggest is > that you write a custom ClassLoader that uses java.net.URL to connect to a > given we

Re: JARs and performance...

1999-05-06 Thread Robert Covell
for the performance part the applet is the big concern. Such a big jar, start off with big problems. Do you think the 1.1 security model will hamper a ClassLoader like that? -Bob On Thu, 6 May 1999, Ted Neward wrote: > Robert-- > > >Trying to optimize JAR performance. We hav

Re: JARs and performance...

1999-05-06 Thread Ted Neward
Robert-- >Trying to optimize JAR performance. We have a JAR that is 700K using >JDK1.1.7 and are looking for ways to improve the performance when using >it. At this time we cannot migrate to Java2 and utilize the >JArURLConnection. Does anyone have any suggestions? We would li

JARs and performance...

1999-05-06 Thread Robert Covell
Trying to optimize JAR performance. We have a JAR that is 700K using JDK1.1.7 and are looking for ways to improve the performance when using it. At this time we cannot migrate to Java2 and utilize the JArURLConnection. Does anyone have any suggestions? We would like to split the JAR into two

Re: jdk1.2pre-v1 performance

1999-04-12 Thread Dimitris Vyzovitis
Peter Schuller wrote: > -BEGIN PGP SIGNED MESSAGE- > Hash: SHA1 > > > I have been comparing the performance of jdk 1.1.7v1a and 1.2pre-v1 > > and have found that 1.2pre-v1 is app. 60% slower than 1.1.7v1a with > > native threads and TYA. I get the same dif

RE: jdk1.2pre-v1 performance

1999-04-12 Thread Peter Schuller
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 > I have been comparing the performance of jdk 1.1.7v1a and 1.2pre-v1 > and have found that 1.2pre-v1 is app. 60% slower than 1.1.7v1a with > native threads and TYA. I get the same difference when I turn jit off > and use green thre

jdk1.2pre-v1 performance

1999-04-12 Thread Sveinn Sveinsson
Hi, I have been comparing the performance of jdk 1.1.7v1a and 1.2pre-v1 and have found that 1.2pre-v1 is app. 60% slower than 1.1.7v1a with native threads and TYA.  I get the same difference when I turn jit off and use green threads.  In all cases the CPU is 100% saturated by java. I'm ru

Re: Performance issues, TYA

1999-03-31 Thread Albrecht Kleine
> Hi, > > Has anybody run any benchmarks comparing jdk117 with tya vs jdk1.2 with > sunwjit? > My runs so far (console applications with timing), indicate that > ***jdk1.1.7+tya1.2 is at least two times faster than jdk1.2-pre1!!!*** > This behavior is for computationally intensive procedures, I d

Re: java performance under linux

1999-03-30 Thread Chris Abbey
> I am developing a network performance benchmarking program with java. I >have resently intalled jdk1.1.7 in my redhat5.1but i am getting very slow >prefrormance. i.e. a for loop from 0 to 3x10^7 takes about 10 secs while >when using vcafe in windows95 itneeds about 1 sec on the sam

Re: java performance under linux

1999-03-30 Thread Bryce McKinlay
[EMAIL PROTECTED] wrote: > I am developing a network performance benchmarking program with java. I > have resently intalled jdk1.1.7 in my redhat5.1but i am getting very slow > prefrormance. i.e. a for loop from 0 to 3x10^7 takes about 10 secs while > when using vcafe in windo

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