What makes eclipse slow

For the slowness issue I'm having, it seems OK after restarting Eclipse. But it became slower soon. I haven't measured the time it took, but it probably slows down after using an hour or so. So it's not I left the IDE for overnight and start having the issue. But I didn't know about the error log. Let me run for a while and see if I can fix any of errors. Thank You. Hello everyone! Error: Could not find or load main class. Although it's very different, but I'd compare this technique with mounting a files system with "noatime" and "nodiratime" option on Linux.

That can make a miracle too. I would suggest leaving the indexer on in general except you normally don't use the search function embedded in windows. For the workspace it might be good to turn off. 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. 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. Use working-sets. They work better than closing projects, particularly if you need to switch between sets of projects all the time. Check it out. It really makes a difference.

Can you clarify? Than in eclipse. How could that possibly do any difference on a linux machine with a decent amount of ram unless the jvm is flushed out from the cache constantly? Couldn't you just do a grep -r or perhaps use vmtouch to load the pages into the fs cache? Because the Linux swap algorithm is not perfect. It sacrifices Java performance for performance in other areas.

You can copy your JDK there on boot. Show 5 more comments. So basically the advice is to shut off most of Eclipse? You are welcome to try it and give me the feedback. One more trick is to disable automatic builds. Csaba Toth. That's a very good idea, nowadays I also use solely Microsoft Security Essentials on my Windows installs. White listing is much better than turning off scanning for all packed contents, since malware payload comes in that form also.

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memory allocation Class verification overhead Excessive indexes and history Obsolete or slow JDK Eclipse being out of date Lengthy build and redeploy times For more details, check out this article from RebelLabs. 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. This threads topic is about "Speeding up Eclipse".

So I seriously doubt that your suggestion to optimize the IDEs code is of any help here. I do agree though that you do not need the latest system to have decent performance. Did not claim that. The topic is about how the end-user can combat the Eclipse developers' apathetic acceptance of incredibly inefficient code. BTW, have you tried NetBeans?

I still having it slow, it takes 20s to start from cold boot eclipse, Is there anyway to make it just take 1s to open everything? What Hardware are you using? And I use openjdk Configure eclipse. Configuring eclipse. 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.

Close perpective that you don't need Close unused database connections. You cloud also simply exlude the "eclipse. Some details would be of interest: When are those plugins enabled now? On first usage or need to be enabled manually and can't be used in your setup over the lifetime of a running instance? If automatically, does one recognize lags whenever the plugin is first used?

Please note that, with above option, you are not removing your plugins, but only disabling them on start-up, so that eclipse would be loaded fast. Upgrading to the latest JVM supported on your machine may help as well. Though it's not recommended to manually remove plugins managed by p2, I find a regular plugin cleanup greatly improves performance and postability, especially if you have a master eclipse configuration copied and shared with multiple developers.

In that case it's better to just archive the master eclipse install instead of relying on everyone to update their configs in synch. Try these. There are two ways. First Procedure Refer this article. Execute the command in the terminal. Set upper limit of ramdisk As is said above, ramdisk by default can use a half of RAM. Without comparing Eclipse to any other tool out there, I find that it can be a very powerful and fast tool to write java code with.

Thank you for your tips. Thanks for the tips. Small correction: Validation is a root category, not a subcategory of General at least in Luna. This will allow you to switch back and forth between two documents by using Ctrl-Tabbing, similar to the behavior of some other popular editors.

Nicolas, a really great and useful post! I will give reference to it on my slides. The JVM refuses to start, it does not find a dylib then. Therefore I only moved rt. The problem with Build Output is that you have to use symbolic links and create them with scripts when working in a team, since other team members might rely on the fact that the output folder is local to the project location.

Favorite Eclipse shortcut, especially for very large projects. Great tips! I use git command line. How do I remove it? Saving of the settings file was taking ages.

Apparently this was caused by xml validation settings. Nicolas, thank you for taking your time to write a nice and useful tutorial. I applied the correct path in eclipse. Any thoughts?

Thank you! Below are the steps to disable auto build for the eclipse project. Eclipse used maximum and minimum memory size are configured in eclipse. You can find this file in the eclipse installed directory. To make your eclipse project build faster, increase the eclipse used maximum memory size is a method.

Below are the steps. If you reduce the auto startup eclipse plugins number, this can save a lot of time when eclipse startup. In development, when you find the eclipse workspace build process is slower and slower, and if the main reason is because of validating static files for example validate JS, CSS, XML file, and so on. Then you need to reduce or remove the validators in the eclipse preference validation section. If there are big JS files that exist in your java project, and you do not want to validate the JS file content, you can exclude the JS files from validating it.

If you find that your eclipse workspace runs still very slow after trying all the above methods. You can use this final method to resolve the eclipse project run slow issue. Each eclipse workspace has a.