What does "Computing additional info" mean?

Eclipse Helios periodically starts running a job which displays "Computing additional info". During this time, Eclipse is very sluggish, bordering on unusable. What does this job do? Can I shut it off?

I just hope that someone in the JDT team comes to sense and gets rid of it, make it go faster, or at the very least change 开发者_StackOverflow中文版it to something meaningful.

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Maybe this bug is related: Bug 293856 - [Browser] "Computing additional info" lag during content assist executions

Other than that:

1. Disable the virus scanner for Eclipse files (projects and the folder where Eclipse is installed). On demand scanning can cause severe performance problems with Java's lazy loading.

2. Disable all plugins that you don't need.

3. Give Eclipse more RAM (512MB or more)

4. Put 4GB of RAM into your computer. Costs nothing (

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I discovered how you can fix this problem. Go to

Window > Preferences > General > Security > Secure Storage and click on "Clear Passwords"

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It's computing/caching some information that will make some operations (like auto suggestion) faster.

I can only suggest several things:

• if you installed Mylyn, try to disable the Task-Focused Content Assist
• check the -Xms and -Xmx parameter in eclipse.ini
• try to stop the auto build