Can I improve performance by compiling and running programs?

I installed Arch Linux two weeks. It was not a simple installation like Ubuntu. But now I have a tailored OS and a better understanding of how it works. I hope one day I can switch my primary OS to Arch Linux. I know that Arch Linux is optimized for i686 processors; I wanted to take this idea to more recent processors.
I have a Core 2Duo processor. If I download the source code (of frequently used programs like Firefox) compile it on my computer and use the program will I get a better performance than downloading the binaries? I'm assuming that I can easily find a compiler that leverages the power of more recent processors.
If the answer if yes, please provide me some references to compilers and documentation.

You can compile your own packages with PKGBUILDs, makepkg and ABS,
See these links for further reference:
http://wiki.archlinux.org/index.php/PKGBUILD
http://wiki.archlinux.org/index.php/ABS … ild_System
When you say compiler I take it you mean compile flags specific for your processor?
Look here: http://wiki.archlinux.org/index.php/Safe_Cflags
You probably won't feel any significant speed increase, though.
Edit: The reason to use these tools instead of the traditional way is that the packages created with these tools can be managed by pacman.
Last edited by Ashren (2008-05-07 00:38:05)

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Problem in compiling and running programs in Java3D

Dear Friends,
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Pl. give me the needed solution, eigther here or at : [email protected]
Thanks,
K.Ranganathan.

follow the installtion guide for java3d on this site (java.sun.com)
To summarise it.... Java3D 1.2 is designed for Java1.2.2, however if, when installing it, u install it to the Java1.3 dir it should work fine...... mine does ;-P
AbU5e,

How can I compile and run other java classes from within an application?

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Compiling and running problems

Dear Friends:
I believe I encountered a very difficult situation when I try to run Fortran
files in Sun Sparc Solaris 8.0.
I would like to describe it, hopefully someone can give me some suggestions.
The the files I try to run is fortran 77 files developed originally for VAX
machine, later on there are Linux and Unix adaptions (but not for Sun
Solaris). The source code is open source from the link:
http://www.webmo.net/support/mopac_linux.html. I have compiled and run
successfully in Redhat 9.0 (means same results as the samples). The linux
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thanks a lot,
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Justin,
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unix:
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unix:
f90 -f77 -w -O *.f -o $(EXE)
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I ran several of the data sets in the examples directory and they appeared to complete successfully. Since none of them run for more than a second or so, it's hard to say whether or not the tuned Performance Library will have a large impact on the performance or not.
If you are interested, please contact me : [email protected]

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Hi All,
Can any one explain me the steps how to improve performance of Dimension and Fact table.
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redd

Hi!
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Kind Regards
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hi
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Test.java
package com.cert;
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public void display()
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javac: no source files
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Try googling for "eclipse servlet", surely someone has written instructions.

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What do you mean by "where to put them" ? What do you want to put anywhere ?
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Compile and run java programs in different directroy

Hi,
I often encounter many problems when I run java programs in the different directories. Like
javac -d dir_name a.java
java -cp dir_name a
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Hi all,
I am new to java and studying alone java from sun's site.Now i am going through sun's step by step programming.From there i got a packaged Application named DiveLog which i wrote and saved in divelog directory in jdk1.2.2which is in C directory.
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Can anyone help me to get rid of the error and compile and run the Application successfully.
Here is the DiveLog application i have written.
package divelog;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
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private JFrame dlframe;
public DiveLog()
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dlframe.addWindowListener(new WindowAdapter()
public void windowClosing(WindowEvent e)
System.exit(0)
tabbedPane = new JTabbedPane(SwingConstants.LEFT);
tabbedPane.setBackground(Color.blue);
tabbedPane.setForeground(Color.white);
populateTabbedPane();
buildMenu();
dlframe.getContentPane().add(tabbedPane);
dlframe.pack();
dlframe.setSize(765,690);
dlframe.setBackground(Color.white);
dlframe.setVisible(true);
private void populateTabbedPane()
tabbedPane.addTab("Welcome",
null,
new Welcome(),
"Welcome to the Dive Log");
tabbedPane.addTab("Diver Data",
null,
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null,
new Dives(),
"Click here to enter dives");
tabbedPane.addTab("Statistics",
null,
new Statistics(),
"Click here to calculate dive statistics");
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tabbedPane.addTab("Resources",
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new Resources(),
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JMenuBar mb = new JMenuBar();
JMenu menu = new JMenu("File");
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Classpath problem. Read the old threads related to in the classpath problem.
/Sreenivasa Kumar Majji.
Hi all,
I am new to java and studying alone java from sun's
site.Now i am going through sun's step by step
programming.From there i got a packaged Application
named DiveLog which i wrote and saved in divelog
directory in jdk1.2.2which is in C directory.
When i tried to compile it i got the error message as
class Resource .java not found.But i have created the
file Resource.java and saved in the same divelog
directory.
somehow i get rid of the error and looked for the
directory but class file is not there.So i understood
that Compilation doesn't took place.
Can anyone help me to get rid of the error and compile
and run the Application successfully.
Here is the DiveLog application i have written.
package divelog;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class DiveLog
private JTabbedPane tabbedPane;
private JFrame dlframe;
public DiveLog()
dlframe = new JFrame("A Java(TM) Technology Dive
Dive Log");
dlframe.addWindowListener(new WindowAdapter()
public void windowClosing(WindowEvent e)
System.exit(0)
tabbedPane = new
e = new JTabbedPane(SwingConstants.LEFT);
tabbedPane.setBackground(Color.blue);
tabbedPane.setForeground(Color.white);
populateTabbedPane();
buildMenu();
dlframe.getContentPane().add(tabbedPane);
dlframe.pack();
dlframe.setSize(765,690);
dlframe.setBackground(Color.white);
dlframe.setVisible(true);
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tabbedPane.addTab("Welcome",
null,
new Welcome(),
"Welcome to the Dive
"Welcome to the Dive Log");
tabbedPane.addTab("Diver Data",
null,
new Diver(),
"Click here to enter
"Click here to enter diver data");
tabbedPane.addTab("Log Dives",
null,
new Dives(),
"Click here to enter
"Click here to enter dives");
tabbedPane.addTab("Statistics",
null,
new Statistics(),
"Click here to calculate
"Click here to calculate dive statistics");
tabbedPane.addTab("Favorite Web Site",
null,
new WebSite(),
"Click here to see a web
"Click here to see a web site");
tabbedPane.addTab("Resources",
null,
new Resources(),
"Click here to see a
"Click here to see a list" + "of
t" + "of resources");
private void buildMenu()
JMenuBar mb = new JMenuBar();
JMenu menu = new JMenu("File");
JMenuItem item = new JMenuItem("Exit");
item.addActionListener(new
istener(new ActionListener()
public void actionPerformed(ActionEvent
ed(ActionEvent e)
System.exit(0);
menu.add(item);
mb.add(menu);
dlframe.setJMenuBar(mb);
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d main(String[] args)
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How to compile and run a java program?

I am getting this error message, what to do?
Exception in thread "main" java.lang.NoClassDefFoundError:
Thanks for you help.
Ajay

Hello,
I believe that this error is caused because when you
compile and run a java program, you have to use the
same name that is next to public class. For example,
the program name is next to the word public class.
For example, if a program began like this:
public class Concat
then the name of the program in this case is Concat
and when you compile it you type: javac Concat.java
when you run it type: java Concat
depending on the name of your program.and depending on whether the class is in a package. And depending on what directory you are currently in.
Also depending on if you set your class path you might
have to type the above like this: jdk1.2.1\bin\javac
Concat.java to compile, and to run you would have to
type jdk1.2.1\bin\java Concat where you would replace
Concat with the name of your program and replace
jdk1.2.1 with the name of your version of java, that
is again if you do not have your classpath set. Hope
this helps.Your examples have nothing to do with whether the CLASSPATH is set--only with whether the PATH is set. And, it may not be jdkXXX\bin. The path to the JDK (in this case, to javac and java executables) could be anything. Classpath should be set on the command line. The OP probably did NOT set a classpath on the command line (preferred), or in the environment variables.
Also, make sure you did not forget to put:
public static void main(String[ ] args)
on the line underneath the line where it says "public
class Concat" where Concat is the name of your
program. Again, I hope this helps.Irrelevant (with the info we have from the OP so far). The error says that the JVM can't even find the class--not that the class doesn't have a main. The "main" referred to in the error message is within the JVM itself.
OP: Did you fix your problem? If not, what directory are your files in? Are they in a package? What command are you typing to get that error? That is, please tell us your entire command line.

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Hi,
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Neerav

Hi,
I already googled it and went through that website before posting here and as you can see the software is paid. And thats exactly why I asked in my original post as to whether there is a way to do it with xcode.
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Neerav Kothari

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hello,
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Well a smarter way of implementing this is by using a solution provided by Java Itself.
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How do i do that ??
Check out the below articles which would help you of how to do that
http://www.ibm.com/developerworks/java/library/j-jcomp/index.html
http://www.javabeat.net/javabeat/java6/articles/java_6_0_compiler_api_1.php
http://books.google.com/books?id=WVbpv8SQpkEC&pg=PA155&lpg=PA155&dq=%22javax+tools%22+compiling+java+file&source=web&ots=XOt0siYe-f&sig=HH27ovuwvJgklIf8omTykUmy-eM
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Hope that might help :)
REGARDS,
RaHuL

How to compile and run java program at command console

hi there
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try this
System.out.println("Enter your Name : ");
BufferedReader console = new BufferedReader( new InputStreamReader( System.in ) );
String s = console.readLine();
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How to compile and run PRO*C programs in Linux

Hi all,
This is my first post in this forum.
I have Oracle 9i installed in linux platform .
How can i compile and run Pro*C programs in linux.(i mean any commands or procedure to run these programs)
please help me in this regard.
Thanks in advance,
Trinath Somanchi,
Hyderabad .

(1) How to compile the Pro*c program U got to have a makefile to compile a Pro*c program. It helps u in compiling and creating an excutable. Once U have created a makefile , just call "make" and it will do the compilation and create the executable as well.
For a sample makefile visit
http://asktom.oracle.com/~tkyte/proc_makefile/
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(3)How to get the output of the program ?Question 2 and 3 are the same. I mean running and getting a output are the same

Can I improve performance by compiling and running programs?

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