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https://issues.apache.org/jira/browse/NETBEANS-2409?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16816731#comment-16816731
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Laszlo Kishalmi commented on NETBEANS-2409:
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>From the 10 second completion time at lead 5.5 seconds were spent in a
>Java.ioFile.list() and java.io.File.isDirectory() call. Both have native
>implementations. Usually at this point we suspecting some AntiVirus software/
>Windows Defender.
My theory on this: As NetBeans is not (yet) installed with a signed windows
installer, the Security software(s) are handling it more suspicious, checking
every disk activity. As NetBeans uses really lot of disk io, this is bogging
down its performacne on Windows (and that's why we are not seeing it on Linux/
Mac). As 8.2 has a signed installer, it might get better scores at the sec
software and that results better IO.
This is just a theory.
> Very Slow Operations on Windows
> --------------------------------
>
> Key: NETBEANS-2409
> URL: https://issues.apache.org/jira/browse/NETBEANS-2409
> Project: NetBeans
> Issue Type: Bug
> Affects Versions: 10.0, 11.0
> Environment: Windows
> Reporter: Laszlo Kishalmi
> Priority: Critical
> Labels: Performance, Windows
> Attachments: NB11_autocomplete.nps, NB11_getHint.nps,
> WinFilesystemSlow.png
>
>
> What is the best course of action for reporting slowness? I can’t share my
> project.
> I’m not certain how to give step-by-step instructions when the problem is
> basically one step in most cases. E.g. invoke auto-complete - nothing
> happens for several seconds. Invoke rename - dialog doesn’t appear for
> several seconds. Find usages - extremely slow > 5 second delay on a private
> member of a class less than 100 lines.
> In general it seems NB 11 is noticeably slower than NB 8.2. Not good
> considering slowness was already my #1 complaint about NB 8.2. I have so far
> found the benefits of NB outweigh the fact that it is much slower than other
> IDEs for the same operations, but the slowness of NB 11 is tipping the scale.
> I don’t want to switch IDEs, pease don’t interpret this as some sort of
> threat to do so. I would like to help find the issues in NB. But I don’t
> have the bandwidth to debug NB and not being about to share my project makes
> it difficult to provide helpful reports :-(
> Are others seeing the slowness?
> Find usages, renames, call-hierarchy, auto-complete… things I use all the
> time, I often have to wait 5 to 10 seconds for a response from the IDE,
> sometimes more.
> I’ve already deleted user dir and cache and restarted.
> I’m using Gradle-based Java projects, running NB 11.0 with JDK 8u202.
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