Hi
Im having the same problems.. every time I change a .jsp file it takes
up to 3 min to recompile it..
My project is very small, there's almost no data in the datastore. The
jsp file is also very small.
I should say that im running appengine through devmode on a mac with
snow leopard.
I have tried profiling with Visualvm and get the following hotspots
(this shows the load of one jsp recompile)..
org.apache.tools.ant.taskdefs.StreamPumper.run() 40.26772 208150
ms
(40.3%) 2
org.mortbay.jetty.Server.handle(org.mortbay.jetty.HttpConnection)
20.24753 104662 ms (20.2%) 13
java.lang.UNIXProcess$2$1.run() 20.171682 104270 ms (20.2%) 1
java.util.concurrent.ThreadPoolExecutor$Worker.run() 10.060698 52005
ms (10.1%) 1
sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run() 9.137142
47231 ms (9.1%) 2
com.google.appengine.api.datastore.dev.LocalDatastoreService.runQuery
(com.google.appengine.tools.development.LocalRpcService.Status,
com.google.apphosting.api.DatastorePb.Query) 0.0101551 58.5 ms (0%) 11
Most of the time when recompiling it seems its waiting for IO or
something - the cpu is almost idle.
My ant target looks like this..
<target name="devmode" depends="javac" description="Run development
mode">
<java failonerror="true" fork="true"
classname="com.google.gwt.dev.DevMode">
<classpath>
<pathelement location="src"/>
<path refid="project.class.path"/>
<path refid="tools.class.path"/>
</classpath>
<jvmarg value="-Xmx512M"/>
<jvmarg value="-javaagent:${appengine.sdk}/lib/agent/appengine-
agent.jar"/>
<jvmarg value="-Xdebug"/>
<jvmarg value="-
Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005"/>
<arg value="-startupUrl"/>
<arg value="${gwt.startupUrl}"/>
<!-- Additional arguments like -style PRETTY or -logLevel DEBUG
-->
<arg value="-server"/>
<arg
value="com.google.appengine.tools.development.gwt.AppEngineLauncher"/>
<arg value="${gwt.module}"/>
</java>
</target>
Cheers
Simon
On Nov 17, 6:04 pm, Toby Reyelts <[email protected]> wrote:
> On Sat, Nov 14, 2009 at 1:01 PM, Steph <[email protected]> wrote:
> > This happens:
> > - running dev_appserver
> > - with JSP files of just any size.
> > - seems to be blocking on initializing the datastore
>
> Can you elaborate on this part a bit more? What are you seeing that makes
> you think it's "initializing the datastore"? Are you restarting the entire
> dev_appserver after modifying the jsp? How large is your datastore (e.g. how
> many entities, how many properties per entity, average size of each
> property).
>
> If you can file an issue with a very simple webapp that reproduces the
> problem, that would be the best way for us to track the problem down.
> Alternatively, you could hook a profiler up to the dev_appserver yourself
> (for example, visualvm, hprof, or jprofiler). With three minutes of
> execution time, there should be a pretty obvious hotspot.
>
>
>
>
>
> > I tried to set --jvm_flag=-Xmx1G in my dev_appserver.cmd file but it
> > does not seem to help much (i don't use eclipse)
> > Another other advice?
>
> > On Nov 13, 12:00 pm, Toby Reyelts <[email protected]> wrote:
> > > Wow, that sounds bad. You're saying that this happens while running the
> > > dev_appserver (not appcfg), and you're only modifying one JSP file? Is
> > that
> > > JSP file huge? Try raising the heap size of your JVM. For example, if
> > you're
> > > using Eclipse, set -Xmx1G in the JVM arguments for your launch config. If
> > > you're running the dev_appserver from the command line, use
> > > --jvm_flag=-Xmx1G.On Fri, Nov 13, 2009 at 12:51 PM, Steph <
> > [email protected]> wrote:
> > > > When modifying a JSP in the war directory, it can take up to 3 minutes
> > > > for the JSP to recompile and the page to render (I am on a brand new
> > > > dual-core CPU 2.66 Ghz).
>
> > > > Is there a way that the JSP compile time can be speed up? This
> > > > slowness makes development almost unbearable. Thanks for your help.
>
> > > > --
>
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