Why is java slow?

Why is java so slow? I think sun needs to make a big improvement on the speed of loading a java program/applet.!!

It is slower because it is an interpreted language. There have been many improvements to the language from compilation and through newer JVM's that further optimize the code. It is someting you must work w/ when you use the language.

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Why is java slower than C and C++

Hi Guys:
I would like to know why Java is slower than C and C++ in terms of compilation speed...
Does it have to do with the fact that Java compiles to byte code first and then the JVM translates byte code to machine code which your processor can understand. whereas C and C++ compiles directly to machine code...
Any ideas on that,...let me know..

It's not necessarily. I would suggest that it always is; whencomparing
specific tasks.I would suggest that is never is (significantly)
when non-trivial and non-specialized applicationsare
involved. Requirements and design always have a
much greater impact.There's no doubt that the design is the most
important
aspect when writing a program, but assuming those
things
are equal, the fact is that a c program will be
faster.Yes, but given the fact that there is almost zero chance that the requirements, design and implementation will be optimal, it means that the real differences between the languages are insignificant compared to the real difference caused by the other factors.
In the theorectical world C/C++ is faster. In the real world, most of the time, it is not significant.

Why is Java slow or causing Lion to be slow?

I did a fresh install of Lion and installed all the needed updates including the APPLE java update plus the malware remover that came with it. Since then a lot of Java games are SLOW. I'm not sure if it's actually java or a Lion update that's causing this issue. Someone suggested I remove my printer software but I dont remember that causing issues before the fresh install. It seems it happened after Apple updates.
Any help is appreciated.
Thanks

It is slower because it is an interpreted language. There have been many improvements to the language from compilation and through newer JVM's that further optimize the code. It is someting you must work w/ when you use the language.

Why learn Java now?

I'm new to Java programming and have developed some small demo classes.
I have exp with other Visual languages and I feel like I'm taking a step back in time writing code in Notepad and compiling and running from dos etc.
I have several classes and lots of code lines to do a simple thing in swing like create a frame and a simple menu panel.
I thought Java required less code but so far it requires 3 times an much as other languages!
What visual tools or IDE�s exist for Java development other than Sun ONE Studio?
Why learn java now? The number of jobs posted online seams to be higher for Java that any other language out there like vb.net, C++ etc.
Any Comments of the Future of Java Jobs?
Running Java:
My apps run slow on XP, 384M ram.
Do production Java applications suffer from slow execution of the JVM layer?

Java code is easier to understand and more stable than "faster" languages. There is more flexibility and extensibility than in other languages, and the error-processing system is quite advanced. There are also very powerful tools you can use out-of-the-box, like JOptionPane:
import javax.swing.*;
public class Foo
    public static void main(String[] args)
        String pass = JOptionPane.showInputDialog(null, "Please enter your password");
        System.out.println("Password="+pass);
Also see javax.swing.JColorChooser.
-Tim

Why does Java Application not working with Macromedia Flash 5 or MX?

Why does Java Application not working with Macromedia Flash 5 or MX?

Who says they don't?
Although I don't know much about those I'd think they should be able to talk to Java Aps using Sockets or request Servlets ...
Spieler

Why is Java update asking me to install openoffice?

I have installed Java jdk 1.6.
Now the update notification is asking me if I want to install openoffice.
I am not interested in that kind of notifications. (By the way I already have installed open office)
There needs to be a differentiation between java updates and other updates (3th party tools). Then I can switch off that kind of notifications.
I am only interested in Java updates.
Why is Java update asking me to install openoffice?
Thanks and regards,
Cees

It's probably asking you to update to iOS 8.2, which includes support for the upcoming Apple Watch.

Unicode String in JFrame's Title Bar / why is java a non-Unicode pgm in XP?

My big question:
Why is Java detected as a non-Unicode program by Windows XP?
I need to do the following before I can write Japanese characters on the JFrame's title bar on Window XP:
From the Control Panel -> Regional Settings and Languages -> Set the Language for non-Unicode Program to Japanese
Thanks in advance,
Noel

Hi Noel,
I'm only guessing here, but I suspect this is still the case...
Under JDK1.3, the title bar produced by a JFrame is provided by the Windows OS, rather than Java itself. You'll find that trying to display foreign characters in a JFrame's title bar on an English Windows system nigh on impossible (you're left with everyone's favourite little rectangles instead). AFAIK, Sun were looking to change this in the future, but I've no idea if they've got there yet.
Windows XP likely refers to Java as a non-Unicode program because it's looking at the main frame. Because the frame is produced by Windows itself (which last I checked was about as Unicode-compliant as my car is), it holds a different encoding to anything else within Java.
At least that's my stab in the dark. ;-)
Ta,
Martin Hughes

Why are Java files listed as needing repair in Disk Utility?

Why are Java files always listed as needing repair in Disk Utility?

FrenchToast wrote:
Baltwo, bull's eye, as always!
X423424X's question is pertinent too: you usually need to repair permissions after some major upgrade or update, not on a regular basis. Is there a particular reason why you'd often try to repair permissions? Here's more on the subject.
Repairing permissions after an update or upgrade is harmless, but I would question the need to do it even there. The Apple update itself should set the correct Permissions. I still do this, really as a hangover from Tiger days -- not certain it was really ever needed there either -- and because it's a habit that's hard to kick, but it's never found anything to repair...but for one buggy exception, which was the 10.5.8 Combo update. Running it once and then repairing Permissions created a real error. It was discovered the Combo needed to be run twice back to back and then Permissions repair. In fact, one would have been better off not running Permissions for that update to begin with. There it wasn't harnless.
https://discussions.apple.com/message/9968141#9968141
BTW, even Flash updates, which always used to set incorrect Permissions, are coming in clean these days.
Exercises in Futility: Permissions Repair

What is cookies.sqlite and why does it slow the start up of mozilla by a minute or so. I found it and deleted it,fixed the problem, but it reappears eveery time I restart mozilla.

what is cookies.sqlite and why does it slow the start up of mozilla by a minute or so. I found it and deleted it,fixed the problem, but it reappears every time I restart mozilla.

AVG reports these sqlite cookies each time firefox starts. they usually belong to tribalfusion or some other tracker. How do I block them in the first place. I thought firefox is a safe browser. Did not have this problem until I upgraded to 3.6.

Why does Java have such a large footprint?

I've been curious about this topic for a while, but I haven't ever looked into this to any depth. I also posted this to stackoverflow but haven't gotten any solid responses so far:
http://stackoverflow.com/questions/1107991/why-does-java-have-such-a-large-footprint
Java - or at least Sun's Hotspot JVM - has long had a reputation for having a very large memory footprint. What exactly is it about the JVM that gives it this reputation? I'd be interested in a detailed breakdown: how much memory goes to the runtime? (The JIT? The GC/memory management? The classloader?) Anything related to "auxiliary" APIs like JNI/JVMTI? The standard libraries? (Which parts get how much?) Any other major components?
I realize that this may not be straightforward to answer without a concrete application plus VM configuration, so just to narrow things down at least somewhat: I'm primarily interested in default/typical VM configurations, and in a baseline console "Hello world" app as well as any real-world desktop or server app. (I'm suspecting that a substantial part of the JVM's footprint is largely independent of the app itself, and it is in this part that I'd like to zoom in, ideally.)
I have a couple of other closely related questions:
Other similar technology, such as .NET/mono, don't exhibit nearly the same footprint. Why is this the case?
I've read somewhere on the intarwebs that a large portion of the footprint is due simply to the size of the standard libraries. If this is the case, then why is so much of the standard libraries being loaded up front?
Are there any efforts (JSRs, whatever) to tame the memory footprint? The closest thing I've come across is a project to reduce the on-disk footprint of the JVM [1] and to modularize the standard library [2].
I'm sure that the footprint has varied over the past decade or so with every new version of Java. Are there any specific numbers/charts chronicling precisely how the JVM's footprint has changed?
[1] http://blogs.sun.com/jtc/entry/reduced_footprint_java_se_bringing
[2] http://blogs.sun.com/theplanetarium/entry/project_jigsaw_modularizing_jdk_7

yangzhang wrote:
I've been curious about this topic for a while, but I haven't ever looked into this to any depth. I also posted this to stackoverflow but haven't gotten any solid responses so far:
http://stackoverflow.com/questions/1107991/why-does-java-have-such-a-large-footprint
Java - or at least Sun's Hotspot JVM - has long had a reputation for having a very large memory footprint. What exactly is it about the JVM that gives it this reputation? I'd be interested in a detailed breakdown: how much memory goes to the runtime? (The JIT? The GC/memory management? The classloader?) Anything related to "auxiliary" APIs like JNI/JVMTI? The standard libraries? (Which parts get how much?) Any other major components?
Presumably versus some other VM. I would suppose the fact that much of the VM is written in java has something to do with it.
I realize that this may not be straightforward to answer without a concrete application plus VM configuration, so just to narrow things down at least somewhat: I'm primarily interested in default/typical VM configurations, and in a baseline console "Hello world" app as well as any real-world desktop or server app. (I'm suspecting that a substantial part of the JVM's footprint is largely independent of the app itself, and it is in this part that I'd like to zoom in, ideally.)
I have a couple of other closely related questions:
Other similar technology, such as .NET/mono, don't exhibit nearly the same footprint. Why is this the case?
Not sure I agree with that. What size do you see with a .Net app that uses 3.0/3.5?
I've read somewhere on the intarwebs that a large portion of the footprint is due simply to the size of the standard libraries. If this is the case, then why is so much of the standard libraries being loaded up front?
Good question. There is a feature that allows multiple VMs to use the same memory footprint version of the loaded libraries. That is a new feature and it isn't clear to me if it covers the entire API. I do not know if that is dynamically built.

Why does Telstra slow uploads speed down

I have had ongoing issues with my internet connection over the last 18 mouths.Having a upload speed of 450/650 Kbps very slow no good for gaming an down load of 8/11Mbps down load if more than I needTo the point I have spent good dollars try to insuring that the infrastructures and the Asset Integrity with in house are in best condition this includes the replacement and work listed belowReplacement of the Wi-Fi system to a Cat.6 cabling at a cost of $2,300Replacement of the modem with a high speed 1G port modem at cost of $ 475Replacement of the fly-lead for the Telstra house connection to the new wall socket a cost of $360Total cost of $3135 this spend was braced on Telstra recommendation as the problem was with my part of the connection after a large number of call to my internet provider I at last had a appointment with a Telstra Tec to carry line testing and fault finding .At this point if no fault was found I was the be billed at $60 per 15min or part off and travel cost as I live in Bullsbrook WA this may I high . Lucky for me a fault was found in the exchange and reconfigured and the speed and the Exchange improved to 22Mbps down and 15 Mbps up an outstanding numbers >test at the house 15Mbps and so 5 / 7 Mbps loss for the Exchange to house don’t to good but still very happy with it BUT the upload was 650 kbps /750Kbps and please remember this testing was carry out by Telstra with good equipment so at this point I ask why the upload was so slow? After spending over $2000 and lot of time on the phone only to be told that Telstra slow the upload speed down so the max you can get is 1 Mbps and the only way you can increase this is by paying for a business line but you still may not get any more than 1MbpsThis is only a very small part of the story SO I LIKE TO ASK WHY IS TELSTRA SLOWING ME DOWNIf you like to know more please let me know

Hi bigdave618,
The simple answer is, that's the way the system and hardware is designed, all ISP's are the same. Uploads are limited to around 1Mbps. If you wish to get higher upload speeds you can see if Cable Broadband or NBN are available in your area as these systems allow for higher upload speeds.
Upload speeds are generally slower than download speeds because of the fact that most internet connected equipment is asymmetric. Asymmetric means that any one packet of data can either go in, or out, but not both ways at the same time. Since most internet users are receiving more data than sending, the internet connected equipment has shifted the higher majority of the signals to go toward downloading.
If you wish to find out more about ADSL I have added a link to a Wikipedia article below along with the link to the NBN and Telstra websites so you can check to see if Cable Broadband or NBN is available in your area.
ADSL Wiki article: http://en.wikipedia.org/wiki/Asymmetric_digital_subscriber_line
Check for available Telstra Cable Broadband: https://www.telstra.com.au/broadband/home-broadband
Check to see if NBN is available in your area: http://www.nbnco.com.au/connect-home-or-business/check-your-address.html
- Ben

Why is atv slow to buffer after connecting with cat5 cable

Why is atv slow to buffer after connecting with cat5 cable

Update on some things I have tried
As I am not sure the cause, I have been reading and trying different things, last thing was to set the interfaces to Duplex Full
I did this on both the Ethernet ports on the routers, and both of the Fast Ethernet ports being used on the switch, but has not changed the speed that PC1 is getting.
Also turned on CEF on both routers

Why is SCP slow realtive to using winSCP on windows?

Why is SCP slow realtive to using winSCP on windows(3MB/s on mac and 11 MB/s on windows)?

You are not having my exact same problem, but try this:
1. Browse to "C:\Users\<YourUserName>\AppData\Roaming" in Windows Explorer.
2. Rename the "Apple Computer" folder to "Apple Computer-old".
3. Start iTunes
4. Close iTunes
5. Copy the file "iTunesPrefs.xml" from "C:\Users\<YourUserName>\AppData\Roaming\Apple Computer-old\iTunes"
6. Paste the old "iTunesPrefs.xml" into the new "Apple Computer\iTunes" folder iTunes just created (not the one you renamed) under "C:\Users\<YourUserName>\AppData\Roaming\Apple Computer-old\iTunes"
7. Overwrite the new iTunesPrefs.xml with your old copy of the file.
If you don't care about losing your iTunes preferences then you can just do step 2. You can always go back and grab things from the old folder later if you realize you wanted to have your EQ settings, individual track gains, etc...

HT1338 Why is macbook slow after installing parallels desktop

why is macbook slow after installing parallels desktop

I have the same problem , I installed the triel version of Paralall 9 in my mac already installed OX 10.9 , and my sistem became as the first PC i had in 1990 !! , and i still have 750GB free !!
so , any idea how to solve this problem ?
thanks

Need help WHY IS JAVA TECH SO IMP

Hi guys im new to the java stuff so i need to ask one question that is
"Why is java technology so important what are its plus points and why (if we should)to preffer it over the .net technology"
thanx

So is the platform independency of JAVA or JAVA being
a prog lang. and .NET being a technoloy, the only
major diff b/w the two. Doesn't JAVA has any other
advantage over .NET if so the what happens if .NET
gets platform independency too. It will sweep through
JAVA coz its considerably faster.I don't know what you're talking about.
"considerably faster"? Why do you say that? .NET has a Common Runtime, just like the JVM. It's byte code that's interpreted. Why will .NET be faster?
Faster on distributed problems? What magic will it work on network latency?
Do databases connected to .NET suddenly run faster?
Honestly, how do you live with such a shallow understanding?
Java is one language that runs on many platforms. .NET has many languages (VB, C++, C#) that run on one platform.
J2EE is a framework for enterprise applications. It's not going away anytime soon. Even if it does, the ideas will linger long after the language has been replaced.
Wake up, Sleep_Walker. Your paper is due soon. - MOD

Why is java slow?

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