----- Original Message -----
From: "Martin Betak" <mbetak@redhat.com> To: "Greg Sheremeta" <gshereme@redhat.com> Cc: "engine-devel" <engine-devel@ovirt.org> Sent: Monday, February 17, 2014 12:15:47 PM Subject: Re: [Engine-devel] GWT Dev Mode unbearably slow in WebAdmin
Yes, this has been my developer experience since I joined the project. 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.
AFAIK classic GWT Dev Mode is slow because it does recompilation on the fly. Not sure if related, but debugging GUI code with "gwtdev" Maven profile (activated through "gwt-debug" Makefile target) downgrades gwt-maven-plugin version to 2.4.0, see http://gerrit.ovirt.org/#/c/22108/ for details. We could try several things here: 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, avoid using method-entry breakpoints as these are very slow [1] disable Firebug during initial page load [1] https://blogs.sourceallies.com/2013/04/java-method-breakpoints-are-evil/
Any improvement to current status would be much appreciated.
I'd like to push towards GWT Super Dev Mode [2] that avoids on-the-fly recompilation, i.e. precompiled permutation debugged directly inside given browser. [2] http://www.gwtproject.org/articles/superdevmode.html (Putting above on my GWT improvement task list.)
Martin
----- Original Message -----
From: "Greg Sheremeta" <gshereme@redhat.com> To: "engine-devel" <engine-devel@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@redhat.com _______________________________________________ Engine-devel mailing list Engine-devel@ovirt.org http://lists.ovirt.org/mailman/listinfo/engine-devel
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