IIRC I have seem this with a complex xpath expression which I avoided at
the end. Please open a bug for that

Rolf Theunissen <rolf.theunis...@gmail.com> schrieb am Do., 3. Juni 2021,
17:04:

> Hi Wim,
>
> I have seen many issues w.r.t. merging fragments, see Umbrella Bug 562497
> <https://bugs.eclipse.org/bugs/show_bug.cgi?id=562497>. But I have not
> seen issues related to performance yet.
>
> Rolf
>
> Op do 3 jun. 2021 om 15:03 schreef Wim Jongman <wim.jong...@gmail.com>:
>
>> Hi,
>>
>> Before I file an issue, does anyone know about performance issues about
>> merging model fragments?
>>
>> I see a 2 minute hang in this area:
>>
>> "main" #1 prio=6 os_prio=0 cpu=85015.63ms elapsed=87.72s
>> tid=0x000000000278e800 nid=0x11f4 runnable  [0x00000000004fc000]
>>    java.lang.Thread.State: RUNNABLE
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.clone(NodePointer.java:717)
>> at
>> org.apache.commons.jxpath.ri.model.beans.PropertyPointer.getImmediateValuePointer(PropertyPointer.java:161)
>> at
>> org.apache.commons.jxpath.ri.model.NodePointer.getValuePointer(NodePointer.java:297)
>> at
>> org.apache.commons.jxpath.ri.model.beans.PropertyIterator.getNodePointer(PropertyIterator.java:121)
>> at
>> org.apache.commons.jxpath.ri.axes.DescendantContext.nextNode(DescendantContext.java:115)
>> at org.apache.commons.jxpath.ri.EvalContext.nextSet(EvalContext.java:349)
>> at
>> org.apache.commons.jxpath.ri.axes.PredicateContext.nextSet(PredicateContext.java:174)
>> at
>> org.apache.commons.jxpath.ri.EvalContext.constructIterator(EvalContext.java:180)
>> at org.apache.commons.jxpath.ri.EvalContext.hasNext(EvalContext.java:112)
>> at
>> org.apache.commons.jxpath.ri.compiler.Expression$ValueIterator.hasNext(Expression.java:182)
>> at
>> org.eclipse.e4.ui.model.fragment.impl.StringModelFragmentImpl.mergeXPath(StringModelFragmentImpl.java:362)
>> at
>> org.eclipse.e4.ui.model.fragment.impl.StringModelFragmentImpl.merge(StringModelFragmentImpl.java:321)
>> at
>> org.eclipse.e4.ui.internal.workbench.ModelAssembler.processModelFragment(ModelAssembler.java:364)
>> at
>> org.eclipse.e4.ui.internal.workbench.ModelAssembler.processFragment(ModelAssembler.java:256)
>> at
>> org.eclipse.e4.ui.internal.workbench.ModelAssembler.processFragments(ModelAssembler.java:216)
>> at
>> org.eclipse.e4.ui.internal.workbench.ModelAssembler.processFragmentWrappers(ModelAssembler.java:186)
>> at
>> org.eclipse.e4.ui.internal.workbench.ModelAssembler.processFragments(ModelAssembler.java:146)
>> at
>> org.eclipse.e4.ui.internal.workbench.ModelAssembler.processModel(ModelAssembler.java:113)
>> at
>> org.eclipse.e4.ui.internal.workbench.ResourceHandler.loadMostRecentModel(ResourceHandler.java:197)
>> at
>> org.eclipse.e4.ui.internal.workbench.swt.E4Application.loadApplicationModel(E4Application.java:371)
>> at
>> org.eclipse.e4.ui.internal.workbench.swt.E4Application.createE4Workbench(E4Application.java:247)
>> at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:573)
>> at
>> org.eclipse.ui.internal.Workbench$$Lambda$142/0x00000001003c8440.run(Unknown
>> Source)
>> at
>> org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
>> at
>> org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:551)
>> at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:156)
>> at
>> org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152)
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