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Posted to commits@netbeans.apache.org by "Shevek (JIRA)" <ji...@apache.org> on 2019/05/20 23:52:00 UTC
[jira] [Commented] (NETBEANS-2291) NetBeans is unusably slow
[ https://issues.apache.org/jira/browse/NETBEANS-2291?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16844400#comment-16844400 ]
Shevek commented on NETBEANS-2291:
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Trying again with NetBeans 11, raised a few issues just now. The killer right now is that I can't find any of my subprojects because they're in random order (NETBEANS-2571). Will report back on code editing in a bit.
Projects seem to load OK now.
> NetBeans is unusably slow
> -------------------------
>
> Key: NETBEANS-2291
> URL: https://issues.apache.org/jira/browse/NETBEANS-2291
> Project: NetBeans
> Issue Type: Bug
> Components: projects - Gradle
> Affects Versions: 8.2, 10.0
> Environment: Ubuntu 18.10
> Linux 4.18.0
> 12 core Xeon E-2176M with 64Gb RAM
> -Xmx2536m (2.5Gb for NB, of which it uses about 1.7G)
> NetBeans 10vc2, 10vc5, 8.2
> JDK 11.0.1
> JDK 1.8
> G1GC, CMS GC, Serial GC
> Reporter: Shevek
> Assignee: Laszlo Kishalmi
> Priority: Critical
> Labels: performance, usability
> Attachments: netbeans-10vc5-jdk8-hang-gototype.txt.tdump, netbeans-10vc5-jdk8-hang-progressutils.txt.tdump, netbeans-10vc5-jdk8-hang.txt.tdump, open-file-slow-01.txt.tdump, open-file-slow-02.txt.tdump, open-file-slow-03.txt.tdump, slow-stack-00.txt
>
>
> I used to use NetBeans 8 on JDK8, it was tolerable, but slow.
> Now I have a new laptop, I've tried nb8, nb10 on jdk8, jdk11, with g1gc, cmsgc, other gc. They are all UNUSABLY slow. By which I mean, it takes over a minute just to open a file.
> Mostly this is because things are waiting for things waiting for very inefficiently implemnted file I/O, editor parsing, or things like that. I've watched a 12-core Xeon chip spend over 4 hours just attempting to handle the Active Reference Queue Daemon thread.
> The slowdown is somewhat incremental - I can escape it as long as I'm happy to restart NetBeans every hour or so (which I'm not happy to do).
> Attached a stack dump to get you started, this took over a minute to open a 284-line Java file from idle.
> Please feel free to ask all the obvious questions, although I'm fairly sure all the obvious things have been done. Mostly, I've got GC down to a negligible amount.
> If there's one or more features of NetBeans I can disable to get acceptable behaviour while still being able to realistically edit Java code, please tell me and I will disable them because I am at the end of my rope after using (and developing for) NetBeans for nearly 10 years. If I can get IntelliJ to load a Java/Gradle project neatly before this gets fixed, I'm gone.
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