Eric Bresie commented on NETBEANS-168:

Does this in any way relate to other background process/cpu issues like:
 # NETBEANS-1864 Background Scanning got stuck
 # NETBEANS-1939 Silent exception thrown during background scanning of projects
 # NETBEANS-1629 there is a memory overflow error when background scanning is 
going on, mainly for large projects/projects within projects or when there are 
many projects open
 # NETBEANS-1929 Hangs during the "Background scanning the projects" (resolved)
 # NETBEANS-1142 Exception when scanning projects
 # NETBEANS-1668 Netbeans Appears to Become Unresponsive
 # NETBEANS-1610 Constant background CPU usage
 # NETBEANS-485 OutOfMemoryError after background scanning of local Maven 
 # NETBEANS-416 Excessive CPU usage

> Background scanning process needs a rethink
> -------------------------------------------
>                 Key: NETBEANS-168
>                 URL: https://issues.apache.org/jira/browse/NETBEANS-168
>             Project: NetBeans
>          Issue Type: Bug
>          Components: ide - Performance, java - Platform, platform - Execution
>    Affects Versions: 8.2, 9.0, 10.0
>         Environment: NetBeans 8.2, Windows 10 x64
>            Reporter: Christian Lenz
>            Priority: Blocker
>              Labels: ca_survey, pull-request-available
>         Attachments: go-to-file.gif, messages - 10.0 vc3.log, messages 10.0 
> vc2.log, messages.log, puls.7z, ui.log, uigestures 10.0 vc, wp-dms.7z
>          Time Spent: 2h 20m
>  Remaining Estimate: 0h
> Often, while cloning, switching branch, merging, opening etc. etc. NetBeans 
> starts Background scanning for changes, but it is not real background, 
> because everything what you want to do then, like changing the branch, 
> commit, push, pull, open project, delete or whatever, is blocking by this 
> task and you can't cancel it, because it is essential.
> Either we need to rethink about this process like to make everything or most 
> of the stuff doing things in parallel or the task should really be 
> cancelable. It is a pain in the ass for big projects when they start to scan 
> for changes. 
> It is a real world case because you acan see it when you work on NetBeans 
> modules.
> Cheers
> Chris

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