We use Eclipse (Indigo, with STS). Certain of our projects take inordinately long to build. Often the progress indicator sticks on, say, 87%, for 30 seconds.
I'm trying to find out what Eclipse is spending it's time on during the build cycle. I hope to be able to optimize the build or disable components that are causing it to be so slow. I'd like to see a log file saying ("compiling java code", "processing resources", etc).
I've poked around the log files in the .metadata directory. I've looked on the Eclipse site for tips. I've tried using "-debug" when starting Eclipse. I still can't find the information I'm looking for.
Is there any way to get Eclipse to spit out a log of what activities it is spending its time on when it builds a project?
What kind of projects are these? Java? Dynamic Web? Two things to look at for hints about what's going on are in the project Properties dialog; look at the Builders section and the Validation section. Try disabling the validations to see if that makes a difference in your build times.
To get some insight into what's happening at the times when the build seems to hang, try setting the -debug and -consoleLog options, as described here.
Disable your virus scanner software for your workspace and project directories. I increased the speed of my build in that way.
You can go to edit Windows->preference->general->workspace->build order to edit the default that exist according to your project need.
And check the maximum number of iteration when building with cycle.
I hope it works.
Since eclipse is a Java application, the usual debugging tools are at your disposal. In particular, you might try connecting to eclipse with JConsole and inspect the thread dump taken when the build "hangs", or run eclipse within a profiler.
You might find out things like a validator trying to download an xml schema, and waiting for the timeout since eclipse is not configured to use the corpoate proxy server - something which is very hard to find out by other means ;-)
Look into Apache Ant build scripts. Eclipse has support to auto generate them as a starting point instead of coding the whole thing by hand. The shop I worked in used tuned ANT scripts to optimize and control build order. We then piped output to log files using shell scripts.
You can try and replace with this aapt . My build for a particular project went from 3 minutes to 41 seconds....
This is an old post but thought of sharing my solution. I was using eclipse Luna and I noted that when you keep on working on a GIT branch without checking into git over the time the build becomes very slow. In my case I just deleted the folder .git and the file .gitignore and the build was very fast. Please note that this will disconnect eclipse from git, therefore use this aproach only if you know how to connect back to git branch using git commands.
My Eclipse was getting slower and slower over time. Tips I found on the Internet did not help.
What I did is completely deleted my workspace, created new one and reimported all my projects into the new workspace and this really made the difference.
So my question is whether it's possible to perform this workspace clean-up without deleting and recreating workspace...
Maybe there is some cache in workspace which is getting big? Any ideas?
Thank you!
Eclipse keeps track of all changes in local history. That might introduce slowdown over time.
Local history is located at .metadata/.plugins/org.eclipse.core.resources/.history.
Not sure about newer versions of eclipse, but in 3.1 settings in
Preferences->General->Workspace->Local history
did not work for me. I had it set by default to 7 days but files were kept for 4 years. And I guess other people here had the same issue.
For me it helped to remove history files manually from
.metadata/.plugins/org.eclipse.core.resources/.history.
I use RAD 7.5 (which is based off of Eclipse 3.4). I found several of my projects had millions of history files, all older than 7 days, and mostly the same dummy MANIFEST.MF file (39 bytes).
I discovered this when I tried to delete an old project with Windows Explorer. After 12 hours, Windows Explorer reported that it had recycled 3.5 million files, and was still working.
I found the only way to remove the workspace was to open a Command Window, CD to
<project>\.metadata\.plugins\org.eclipse.core.resources\.history
then type
DEL *.* /s/q
Even this took the better part of an hour.
Try running eclipse from command prompt with
eclipse.exe -clean
More http://www.myeclipseide.com/PNphpBB2-viewtopic-t-10280.html
Sometimes due to Physical Memory issue it cant build the workspace.
So To remove Memory issues update #
eclipse.ini
file as below
-Xms512m
-Xmx1024m
-XX:MaxPermSize=1024m
--launcher.XXMaxPermSize 1024m
I just solve the problem by deleting all stuffs inside eclipse's directory OPTReplica. after that, re-stat eclipse, for me it helps.
Eclipse is programmed as a filebomb, and it causes a large variety of problem, evben on modern robust filesystem. Problem can goes from large waste of diskspace for nothing to preventing your OS to boot if your workspace is on your OS partition. Eclipse is programmed as a filebomb.
The cleanup mechanism in eclipse doesn't work, so the only viable option is to frequently cleanup your workspace by hand at regular interval, or to add your cleanup code to a sh file that does it before launching eclipse.
An other option will be to introduce the eclipse developpers to the fabulous world of databases that produce faster to run and easier to write code. Sadly a rhumor says that they will shot on sight everyone that pronounce the words "sqlite" or "jdbc", and will sacrifice virgind every sunday to the all-mighty-god-of-filebombs.
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How can you make the experience with Eclipse faster?
For instance: I disable all the plugins I don't need (Mylyn, Subclipse, …).
Instead of using a plugin for Mercurial, I configure TortoiseHG as an external tool.
The three most influential factors for Eclipse speed are:
Using the latest version of Eclipse (2020-06 as on 26 June 2020)
Note that David Balažic's comment (July 2014) contradicts that criteria which was working six years ago:
The "same" workspace in Indigo (3.7.2) SR2 loads in 4 seconds, in Kepler SR2 (4.3.2) in 7 seconds and in Luna (4.4.0) in 10 seconds. All are Java EE bundles. Newer versions have more bundled plugins, but still the trend is obvious. (by "same" workspace I mean: same (additionally installed) plugins used, same projects checked out from version control).
Launching it with the latest JDK (Java 14 at the time of writing, which does not prevent you to compile in your Eclipse project with any other JDK you want: 1.4.2, 1.5, 1.6 older...)
-vm jdk1.6.0_10\jre\bin\client\jvm.dll
Configuring the eclipse.ini (see this question for a complete eclipse.ini)
-Xms512m
-Xmx4096m
[...]
The Xmx argument is the amount of memory Eclipse will get (in simple terms). With -Xmx4g, it gets 4 GB of RAM, etc.
Note:
Referring to the jvm.dll has advantages:
Splash screen coming up sooner.
Eclipse.exe in the process list instead of java.exe.
Firewalls: Eclipse wants access to the Internet instead of Java.
Window management branding issues, especially on Windows and Mac.
Dec. 2020, Udo conforms in the comments
From version 4.8 (Photon) an up there was a steady speed gain after each version.
The main platform was optimized every release to load faster, enable more features for the dark theme and to add more features for newer Java versions for the Java development tools.
Especially with-in the last 3 versions the startup time was increased a lot. There should be a significant increase in start-up time with the newest version of Eclipse 2020-12.
In my experience it started a lot faster with each new version.
But: There are still plug-ins which do not follow the new way of using the Eclipse API and are therefore still slow to start.
Since the change to Java 11 as the minimum runtime version starting from Eclipse version 2020-09 at least the core system uses the newer features of the JVM. It is up to the providers of the other plug-ins to upgrade to newer APIs and to use the full power of modern CPUs (e.g. concurrent programming model).
See also
Giving Eclipse the right number of threads and the right amount of memory: Problem: Eclipse and the Eclipse indexer take up all my resources / CPU%
Add -Xverify:none to your eclipse.ini file.
It will cut down your Eclipse startup time considerably (50% in my case if not more). This will tell the VM not to validate all the .class files it is loading.
Consider this: Never Disable Bytecode Verification in a Production System
(as mentioned in the comments)
Go to Windows -> Preferences -> Validation and uncheck any validators you don't want or need.
For Eclipse 3.7, you use Windows -> Preferences -> General -> Startup and Shutdown.
Make sure that you're using the Sun JVM to run Eclipse.
On Linux, particularly Ubuntu, Eclipse is installed by default to use the open source GCJ, which has drastically poorer performance. Use update-alternatives --config java to switch to the Sun JVM to greatly improve UI snappiness in Eclipse.
Close any open projects which are not in current use.
Try to switch off the auto publish mode during development.
Thanks for the hints.
These options (mentioned above) helped me a lot:
Windows:
Increasing memory & regarding to my updated Java version in eclipse.ini:
-Dosgi.requiredJavaVersion=1.6
-Xms512m
-Xmx512m
-XX:PermSize=512m
-XX:MaxPermSize=512M
-Xverify:none
Additionally, since we are optimizing for speed, setting -Xms to the same value as -Xmx makes the JVM start with the maximum amount of memory it is allowed to use.
Linux / Ubuntu:
Using
update-alternatives --config java
Another performance boost can be gained by disabling label decorations
(Windows -> Preferences; General -> Appearance -> Label Decorations)
and by disabling unused capabilities on startup
(Windows -> Preferences; General -> Startup and Shutdown).
You may also get additional performance by choosing a different garbage collection strategy depending on your JVM.
If you're fed up with restart cycles you could use JavaRebel from ZeroTurnaround. That will shorten your time spent on server/client restarts.
While not directly related to Eclipse:
If you're running Windows 7 (and presumably Windows Vista), be sure to disable the file indexing of your workspace folder if your stuff is is in the default place - your home folder. Windows by default indexes everything in you home folder, and it's normally just a waste for your workspace. (Right click the workspace folder in explorer , Properties -> Advanced.)
Disable virus scanners, or at least configure any virus scanner to not scan JAR files on read access.
Eclipse loads plug-ins lazily, and most common plug-ins,
like Subclipse, don't do anything if you don't use them.
They don't slow Eclipse down at all during run time, and it
won't help you to disable them. In fact, Mylyn was shown to
reduce Eclipse's memory footprint when used correctly.
I run Eclipse with tons of plug-ins without any performance
penalty at all.
Try disabling compiler settings that you perhaps don't
need (e.g. the sub-options under "parameter is never read).
Which version of Eclipse are you using? Older versions
were known to be slow if you upgraded them over and over
again, because they got their plug-ins folder inflated
with duplicate plug-ins (with different versions). This
is not a problem in version 3.4.
Use working-sets. They work better than closing projects,
particularly if you need to switch between sets of
projects all the time.
It's not only the memory that you need to increase with the -Xmx
switch, it's also the perm gen size. I think that
problem was solved in Eclipse 3.4.
There is another thing that really speeds up Eclipse on both Windows and especially Linux - putting the JVM in RAM disk.
For Windows you can use the commercial RAM disk driver from Qsoft.
For Linux use any of the methods described in numerous articles on the Internet. It is important to give additional space to the RAM disk that is 10% bigger than the size of the JVM.
Check it out. It really makes a difference.
I give it a ton of memory (add a -Xmx switch to the command that starts it) and try to avoid quitting and restarting it- I find the worst delays are on startup, so giving it lots of RAM lets me keep going longer before it crashes out.
Along with the latest software (latest Eclipse and Java) and more RAM, you may need to
Remove the unwanted plugins (not all need Mylyn and J2EE version of Eclipse)
unwanted validators
disable spell check
close unused tabs in Java editor (yes it helps reducing Eclipse burden)
close unused projects
disable unwanted label declaration (SVN/CVS)
disable auto building
reference:making-eclipse-ide-faster
I implemented a plug-in to configure which features to be loaded in runtime to improve the performance and reduce the conflict among different plug-ins.
You may have installed many features into your Eclipse, such as Android development tools, C/C++ development tools, PHP, SVN, Git and ClearCase plug-ins. Hence Eclipse is heavy and costs a lot of memory, and some of them are not often used.
So you could use my tool to create different runtime policies, such as one that has Android, Git and base Eclipse, another one contains C/C++, SVN and base Eclipse. Next time Eclipse would only load the specified features if you're using the policy that only has Android and Git.
You are welcome to try it and give me the feedback. :)
The name of that tool is Equinox Advanced Configurator.
One more trick is to disable automatic builds.
I also tuned vmargs and stuff. But what really sped up Eclipse on Windows is the "proper" configuration of the anti-virus software. You have to disable the on-demand scanning of packed files. jar files, and many files related to java are packed with PKZIP algorithm to spare space. Because Eclipse uses tons of java files, an anti-virus attempts to individually unpack and scan every one of them. So for Windows platform: turn off the on-demand scanning of packed files, otherwise Eclipse will be unusably slow. Please keep in mind, that disabling this unfortunately makes your system weaker against attacks, most of the malware use packers.
I experienced a considerable improvement in performance when limiting the number of open tabs (in the past I frequently had 30+ tabs open). You can let Eclipse handle this for you automatically:
Window -> Preferences -> Editors -> close editors automatically
8 open tabs is the amount before the >> sign appears, so I tend to leave it at 8.
When opening more tabs, the ones the least recently accessed will be closed.
->When all editors are dirty or pinned
If it has unsaved modifications you can prompt to save & reuse (tab will be closed, a new one will be opened in its place). Or you can open a new editor end thus increase the amount of open tabs (the unobtrusive choice).
If you want to ensure some tabs never get closed autmatically, you can pin them. This by clicking on the pin icon (the rightmost icon in the toolbar, with "pin editor" as tooltiptext).
Best practices in this thread are implemented in the free Optimizer For Eclipse, from ZeroTurnaround.
What does it help with?
Insufficient memory allocation
Class verification overhead
Excessive indexes and history
Obsolete or slow JDK
Eclipse being out of date
Lengthy build and redeploy times
For more details, check out this article from RebelLabs.
Make an effort to configure your build path. Code completion uses a lot of memory if it has to go through your whole project folder.
Right click on your project and choose preferences.
Choose your build path setting and remove your project folder.
Then add only the folders where you have your source code and library code.
Not to be underrated is having a fast machine. 16-32 GB of RAM, SSD and a decent processor... and who0o0om there you go.
**Tips for making Eclipse IDE Faster**
Eclipse will run faster when working with small projects. But when you have to work with large project, you will get irritated with its speed. Even with a huge RAM you will not be happy with its
speed.Below steps will help eclipse to increase its speed
Remove unwanted activation of some of the plugins at start-up by going to windows–>preference–>General–>Startup and shutdown
also make sure you don’t use those plugins in any of your views
Disabling label decorations which is of less use for you, will also help you to gain some performance . Go to Windows–>Preference–>General–>Appearance–>Label -> Decorations
Close unwanted projects and use working set option to move from one group of project to another smoothly.
Configure eclipse.ini which will be available in the eclipse installed location.
Configuring eclipse.ini should be based on your RAM
-Xms256m
-Xmx512m
-XX:PermSize=512m
-XX:MaxPermSize=512M
Also have a look at http://wiki.eclipse.org/Eclipse.ini for more options
to configure eclipse.ini.
Do not keep lot of tabs opened in the editor. Better to have around 20 tabs . Regularly close the unused tabs. To open resource we can always use ctrl+shift+R and ctrl+shift+T (java resource) instead of opening lot of tabs
I experienced a considerable improvement in performance when limiting the number of open tabs (In the past I frequently had 30+ tabs open). You can let eclipse handle this for you automatically:
Window->Preferences->Editors-> close editors automatically
8 open tabs is the amount before the >> sign appears, so I set 14 as my default value.
When opening more tabs, the ones the least recently accessed will be closed. When all editors are dirty or pinned.
If it has unsaved modifications you can prompt to save & reuse (tab will be closed, a new one will be opened in its place). Or you can open a new editor end thus increase the amount of open tabs (the unobtrusive choice). If you want to ensure some tabs never get closed autmatically, you can pin them. This by clicking on the pin icon (the rightmost icon in the toolbar, with “pin editor” as tooltiptext).
Go to Windows -> Preferences -> Validation and uncheck any
validators
you don’t want or need.
Go to Windows -> Preferences -> General -> Appearance -> and uncheck any animation you don’t want or need.
Go to Windows -> Preferences -> Maven and check 'do not automatically update dependencies'.
I've disabled all unused options in Windows > Preferences > General and it has a huge positive impact on performance, eclipse is still slow when switching tabs, I don't want to increase memory, but it's a lot faster when scrolling. Thx for the tips.
Try this too, it will improve the performance:
cleaning up indexes - {workspace
path}.metadata.plugins\org.eclipse.jdt.core cleaning up history -
{workspace
path}.metadata.plugins\org.eclipse.core.resources.history
Cleaning the above folders will not impact the project files.
Well, if you are developing a GWT application using Eclipse, then this is the way:
Out of memory error in Eclipse
Also remember to add the same VM arguments to the hosted mode configuration.
If you use Maven and ivy do check out their consoles in case they are hogging processing during builds. I use ivy and on top of that I have certain JAR files (internal) changing with same version, so it has to workout all the time to fetch them.
If you have defined you project on a network drive then you will also experience lag during build/read/write type of processes.
Disable/uninstall plugins you don't need.
Close perpective that you don't need
Close unused database connections
In special cases, bad performance can be due to corrupt h2 or nwire databases. Read Five tips for speeding up Eclipse PDT and nWire for more information.
Where I work, we are dependent on a VM to run Debian. I have installed another Eclipse version on the VM for testing purpouses, but this sometimes creates conflicts if I have the other Eclipse version running. There is a shared folder which both of the Eclipse versions shares. I accidentally left the Debian Eclipse installation running in the background once and that gave me corrupt database files.
On Windows 8.
Open Control panel. Find Windows Defender. Go to settings
Exclude all folders where is your Spring/Eclipse and workspace
Apart from configuring eclipse.ini for memory usage. I have configured by "Start up & shutdown options". My Eclipse is blazing fast now.
The only real way to hasten Eclipse with the standard plug-ins is to give it more memory and in some cases access to a faster storage space / defragmented hard drive.
Beyond that there is not much you can do performance-wise: most standard plug-ins do not have a continuous runtime cost, even Mylyn is relatively fast.
Upgrading to the latest JVM supported on your machine may help as well.
Some people downgrade to older Eclipse versions to get better performance. It may also make sense to use Eclipse classic instead of the official releases.
Try these. There are two ways.
First Procedure
Refer this article.
http://www.javacodegeeks.com/2014/06/the-real-way-to-make-eclipse-run-faster-on-ubuntu.html
Second Procedure.
Execute the command in the terminal.
ramdisk
to get better performance and fast response for Ubuntu.
Ramdisk is part of system memory. Ubuntu by default uses a half of physical memory (RAM) as ramdisk, and it is mounted onto
/dev/shm
, it can be used just like normal disk space (create files and folders and manipulate them with better performance rather if they were stored on the hard disk). If ramdisk uses more than a half of RAM, data will be moved into the swap space. If ramdisk uses less, the remaining can still do what RAM’s doing.
Set upper limit of ramdisk
As is said above, ramdisk by default can use a half of RAM. If you want to change the upper limit, follow the steps below:
Edit /etc/fstab by your favourate editor:
gksudo gedit /etc/fstab
Find this line and change to make it looks like this(add this line if not exist, and change 512M to what you like.):
tmpfs /dev/shm tmpfs defaults,size=512M 0 0
Reboot or re-mount
/dev/shm
Mount /tmp onto ramdisk
To make it easy to use, you can mount a directory into
/dev/shm
by following commands:
mkdir /dev/shm/tmp
chmod 1777 /dev/shm/tmp
mount --bind /dev/shm/tmp /tmp