I am using Eclipse Neon.1 on Windows 10 with Redhat JBoss Developer Studio to work on a JavaEE 7 Project running on Wildfly 10 via jdk1.8.0_25.
The Project has about 20.000 lines of Java source and also about 20.000 lines of .xhtml source code.
All in all, Eclipse performs quite well. Except the Xhtml Editor. Once I start to edit .xhtml files, Eclipse freezes up all 5-15 mins for about 30 sec. This happens only while using the Xhtml Editor. Java or other Editors do not show that behavoir.
I tried the default Html Editor and the JBoss Tools Html Editor. Both show the exact same behavoir.
I searched the web and tried some solutions like switching off automaitc build, source link navigation and validators. Nothing of that changed the behavoir.
So I started to watch the Eclipse Process in JVisualVM. At times when the Editor freezes, there is full CPU load on one Core, no GC activity and plenty of Memory left. So I would say its not a general problem with Memory or the GC.
How can I find out what exactly causes these freezes? Maybe someone knows this very issue?
Are you using devstudio 10.2 as installed from Eclipse Marketplace (or other update site) into an existing Eclipse Neon.1 install?
If so, you could try playing with your memory settings in eclipse.ini. Or, try using the devstudio installer, which will give you different memory settings in devstudio.ini.
https://developers.redhat.com/products/devstudio/download/
If you're not already on devstudio 10.2, you could try updating to the latest.
But if it's NOT a memory problem... then you might want to report this as a bug in JIRA here:
https://issues.jboss.org/secure/CreateIssue.jspa?pid=10020&issuetype=1 using component = jsp/jsf/xml/html-source-editing
Could you also attach a sample project or .xhtml file to that JIRA, which causes the freeze, so someone can reproduce your issue?