[Engine-devel] GWT Dev Mode unbearably slow in WebAdmin

Greg Sheremeta gshereme at redhat.com
Fri Mar 21 14:15:03 UTC 2014 


----- Original Message -----
> From: "Vojtech Szocs" <vszocs at redhat.com>
> To: "Greg Sheremeta" <gshereme at redhat.com>
> Cc: "engine-devel" <engine-devel at ovirt.org>
> Sent: Friday, March 21, 2014 10:11:38 AM
> Subject: Re: [Engine-devel] GWT Dev Mode unbearably slow in WebAdmin
> 
> 
> 
> ----- Original Message -----
> > From: "Greg Sheremeta" <gshereme at redhat.com>
> > To: "Vojtech Szocs" <vszocs at redhat.com>
> > Cc: "engine-devel" <engine-devel at ovirt.org>
> > Sent: Friday, March 21, 2014 3:04:17 PM
> > Subject: Re: [Engine-devel] GWT Dev Mode unbearably slow in WebAdmin
> > 
> > 
> > ----- Original Message -----
> > > From: "Vojtech Szocs" <vszocs at redhat.com>
> > > To: "Greg Sheremeta" <gshereme at redhat.com>
> > > Cc: "engine-devel" <engine-devel at ovirt.org>
> > > Sent: Friday, March 21, 2014 9:57:00 AM
> > > Subject: Re: [Engine-devel] GWT Dev Mode unbearably slow in WebAdmin
> > > 
> > > 
> > > 
> > > ----- Original Message -----
> > > > From: "Greg Sheremeta" <gshereme at redhat.com>
> > > > To: "engine-devel" <engine-devel at ovirt.org>
> > > > Sent: Friday, March 21, 2014 1:32:54 AM
> > > > Subject: Re: [Engine-devel] GWT Dev Mode unbearably slow in WebAdmin
> > > > 
> > > > I'm afraid I need to resurrect this. I'm again seeing unbearable
> > > > slowness
> > > > with GWT Dev Mode in webadmin on master. The first load is tolerable,
> > > > and
> > > > one or two refreshes are ok, but after that it bogs down and is
> > > > unusable.
> > > 
> > > Some suggestions (that have been already mentioned in this thread a while
> > > ago):
> > > 
> > > 1, use gwt-maven-plugin 2.5.1 instead of 2.4.0
> > >    in root pom.xml change
> > >    <gwt-maven-plugin.workingRefresh.version>2.4.0</gwt-maven-plugin.workingRefresh.version>
> > >    to
> > >    <gwt-maven-plugin.workingRefresh.version>${gwt.version}</gwt-maven-plugin.workingRefresh.version>
> > > 
> > > 2, disable GWT persistent unit cache
> > >    in frontend/webadmin/modules/pom.xml find
> > >    <artifactId>gwt-maven-plugin</artifactId>
> > >    add <persistentunitcache>false</persistentunitcache> to
> > >    <configuration>
> > >    -or-
> > >    make gwt-debug [usual options]
> > >    DEV_EXTRA_BUILD_FLAGS="-Dgwt.persistentunitcache=false"
> > > 
> > > 3, try out GWT Super Dev Mode
> > > 
> > > Vojtech
> > 
> > Vojtech, you're not experiencing this slowness?
> 
> In fact, I am .. (and I have quite powerful laptop)
> 
> The slowness is a combination of two factors, lots of UI code (for GWT
> compiler to process) + on-the-fly recompilation of GWT Dev Mode. The "lots
> of code" factor should be improved when we transition to REST API and
> introduce other UI improvements (like alternative/dynamic i18n
> implementation, possibly UiCommon code refactoring, etc).
> 
> I've seen that people tend to use Super Dev Mode for basic debugging, falling
> back to Classic (slow) Dev Mode for deeper debugging. (So far, I didn't have
> time to try out Super Dev Mode myself.)

Alright. I'm trying out Super Dev Mode right now.


> 
> > 
> > 
> > > 
> > > > 
> > > > Anyone else?
> > > > 
> > > > Greg
> > > > 
> > > > 
> > > > ----- Original Message -----
> > > > > From: "Greg Sheremeta" <gshereme at redhat.com>
> > > > > To: awels at redhat.com
> > > > > Cc: "engine-devel" <engine-devel at ovirt.org>
> > > > > Sent: Thursday, February 27, 2014 9:26:40 AM
> > > > > Subject: Re: [Engine-devel] GWT Dev Mode unbearably slow in WebAdmin
> > > > > 
> > > > > Thanks, and great work figuring it out :)
> > > > > 
> > > > > Greg
> > > > > 
> > > > > ----- Original Message -----
> > > > > > From: "Alexander Wels" <awels at redhat.com>
> > > > > > To: "Greg Sheremeta" <gshereme at redhat.com>
> > > > > > Cc: "Lior Vernia" <lvernia at redhat.com>, "Martin Betak"
> > > > > > <mbetak at redhat.com>,
> > > > > > "engine-devel" <engine-devel at ovirt.org>,
> > > > > > "Vojtech Szocs" <vszocs at redhat.com>
> > > > > > Sent: Thursday, February 27, 2014 8:32:00 AM
> > > > > > Subject: Re: [Engine-devel] GWT Dev Mode unbearably slow in
> > > > > > WebAdmin
> > > > > > 
> > > > > > Master is back to its normal zippy self in GWT dev mode as of 8:25
> > > > > > EST
> > > > > > Feb
> > > > > > 27th 2014. With relative values for zippy. If you are annoyed by
> > > > > > the
> > > > > > slow
> > > > > > GTW
> > > > > > dev mode be sure to fetch and rebase.
> > > > > > 
> > > > > > On Wednesday, February 19, 2014 10:51:06 AM Greg Sheremeta wrote:
> > > > > > > I agree with Lior. Alexander (cc'd) has a patch that will
> > > > > > > hopefully
> > > > > > > address
> > > > > > > it.
> > > > > > > 
> > > > > > > Greg
> > > > > > > 
> > > > > > > ----- Original Message -----
> > > > > > > 
> > > > > > > > From: "Lior Vernia" <lvernia at redhat.com>
> > > > > > > > To: "Martin Betak" <mbetak at redhat.com>
> > > > > > > > Cc: "Greg Sheremeta" <gshereme at redhat.com>, "engine-devel"
> > > > > > > > <engine-devel at ovirt.org>, "Vojtech Szocs" <vszocs at redhat.com>
> > > > > > > > Sent: Wednesday, February 19, 2014 10:27:51 AM
> > > > > > > > Subject: Re: [Engine-devel] GWT Dev Mode unbearably slow in
> > > > > > > > WebAdmin
> > > > > > > > 
> > > > > > > > Hi guys,
> > > > > > > > 
> > > > > > > > On 17/02/14 13:15, Martin Betak wrote:
> > > > > > > > > Yes, this has been my developer experience since I joined the
> > > > > > > > > project.
> > > > > > > > 
> > > > > > > > To my eyes, it hasn't always been this slow. Something
> > > > > > > > aggravated
> > > > > > > > the
> > > > > > > > situation sometime in the past 3 weeks. I'm not knowledgeable
> > > > > > > > enough
> > > > > > > > to
> > > > > > > > say what went wrong, but this is not simply a gradual
> > > > > > > > degradation
> > > > > > > > of
> > > > > > > > more code being compiled, etc.
> > > > > > > > 
> > > > > > > > Lior.
> > > > > > > > 
> > > > > > > > > The 5-6 minute page-loads are a standard but the GWT Dev Mode
> > > > > > > > > gets
> > > > > > > > > progressively
> > > > > > > > > slower after each "refresh" that involves frontend
> > > > > > > > > recompilation.
> > > > > > > > > Also
> > > > > > > > > the
> > > > > > > > > memory
> > > > > > > > > consumption increases and after 5-th "refresh" or so I have
> > > > > > > > > to
> > > > > > > > > kill
> > > > > > > > > it
> > > > > > > > > and
> > > > > > > > > recompile the whole engine.
> > > > > > > > > 
> > > > > > > > > Any improvement to current status would be much appreciated.
> > > > > > > > > 
> > > > > > > > > Martin
> > > > > > > > > 
> > > > > > > > > 
> > > > > > > > > 
> > > > > > > > > ----- Original Message -----
> > > > > > > > > 
> > > > > > > > >> From: "Greg Sheremeta" <gshereme at redhat.com>
> > > > > > > > >> To: "engine-devel" <engine-devel at ovirt.org>
> > > > > > > > >> Sent: Friday, February 14, 2014 4:50:46 PM
> > > > > > > > >> Subject: [Engine-devel] GWT Dev Mode unbearably slow in
> > > > > > > > >> WebAdmin
> > > > > > > > >> 
> > > > > > > > >> Has anyone else noticed that GWT Dev Mode is unbearably slow
> > > > > > > > >> for
> > > > > > > > >> WebAdmin?
> > > > > > > > >> On
> > > > > > > > >> my machine, it's to the point where I might as well rebuild
> > > > > > > > >> the
> > > > > > > > >> entire
> > > > > > > > >> application for every change and not bother with Dev Mode.
> > > > > > > > >> Pages
> > > > > > > > >> take
> > > > > > > > >> 4
> > > > > > > > >> or
> > > > > > > > >> 5
> > > > > > > > >> minutes to render. Sometimes after 5 minutes, I just give
> > > > > > > > >> up,
> > > > > > > > >> close
> > > > > > > > >> everything, and rebuild the app.
> > > > > > > > >> 
> > > > > > > > >> For now, I want to see if others have this issue. If we
> > > > > > > > >> confirm
> > > > > > > > >> that
> > > > > > > > >> it's
> > > > > > > > >> widespread, we can discuss ways to mitigate.
> > > > > > > > >> 
> > > > > > > > >> Greg Sheremeta
> > > > > > > > >> Red Hat, Inc.
> > > > > > > > >> Sr. Software Engineer, RHEV
> > > > > > > > >> Cell: 919-807-1086
> > > > > > > > >> gshereme at redhat.com
> > > > > > > > >> _______________________________________________
> > > > > > > > >> Engine-devel mailing list
> > > > > > > > >> Engine-devel at ovirt.org
> > > > > > > > >> http://lists.ovirt.org/mailman/listinfo/engine-devel
> > > > > > > > > 
> > > > > > > > > _______________________________________________
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> > > > > > > > > Engine-devel at ovirt.org
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> > > > > > 
> > > > > > 
> > > > > _______________________________________________
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> > > > > http://lists.ovirt.org/mailman/listinfo/engine-devel
> > > > > 
> > > > _______________________________________________
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> > > > 
> > > 
> > 
>

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