UI freeze on large repositories (2.6.1.201812310900, MacOS)

Created originally on Bitbucket by PaulEichhorn (Paul Eichhorn)

On large repositories, opening the MercurialEclipse popup menu freezes the entire IDE for significant amount of times ( 20 000 files -> 6 min freeze ).

Thread dump during this time points to an enablement expression for one or more of the actions. It seems that the cache for file status works on file level, so every file in the working directory is queried at least once. Perhaps a switch to folder status caching at this point might be beneficial.

Thread dump:

#!java
"main" #1 prio=6 os_prio=31 tid=0x00007fac4c826000 nid=0x307 runnable [0x00007ffee5b91000] 
   java.lang.Thread.State: RUNNABLE 
        at java.io.UnixFileSystem.getBooleanAttributes0(Native Method) 
        at java.io.UnixFileSystem.getBooleanAttributes(UnixFileSystem.java:242) 
        at java.io.File.isFile(File.java:882) 
        at com.vectrace.MercurialEclipse.model.resources.HgContainerAdapter.getChild(HgContainerAdapter.java:147) 
        at com.vectrace.MercurialEclipse.model.resources.HgContainerAdapter.getChild(HgContainerAdapter.java:161) 
        at com.vectrace.MercurialEclipse.model.resources.HgContainerAdapter.getChild(HgContainerAdapter.java:161) 
        at com.vectrace.MercurialEclipse.model.resources.HgContainerAdapter.getChild(HgContainerAdapter.java:161) 
        at com.vectrace.MercurialEclipse.model.resources.HgContainerAdapter.getChild(HgContainerAdapter.java:161) 
        at com.vectrace.MercurialEclipse.model.resources.HgContainerAdapter.getChild(HgContainerAdapter.java:161) 
        at com.vectrace.MercurialEclipse.model.resources.HgContainerAdapter.getChild(HgContainerAdapter.java:161) 
        at com.vectrace.MercurialEclipse.model.resources.HgContainerAdapter.getChild(HgContainerAdapter.java:161) 
        at com.vectrace.MercurialEclipse.model.resources.HgContainerAdapter.getChild(HgContainerAdapter.java:161) 
        at com.vectrace.MercurialEclipse.model.resources.HgContainerAdapter.getFile(HgContainerAdapter.java:120) 
        at com.vectrace.MercurialEclipse.team.cache.MercurialStatusCache.getLocalMembers(MercurialStatusCache.java:1419) 
        at com.vectrace.MercurialEclipse.menu.FlagPropertyTester.testAnyChildStatus(FlagPropertyTester.java:175) 
        at com.vectrace.MercurialEclipse.menu.FlagPropertyTester.test(FlagPropertyTester.java:94) 
        at org.eclipse.core.internal.expressions.Property.test(Property.java:61) 
        at org.eclipse.core.internal.expressions.TestExpression.evaluate(TestExpression.java:103) 
        at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(CompositeExpression.java:55) 
        at org.eclipse.core.internal.expressions.AdaptExpression.evaluate(AdaptExpression.java:118) 
        at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(CompositeExpression.java:55) 
        at org.eclipse.core.internal.expressions.IterateExpression.evaluate(IterateExpression.java:165) 
        at org.eclipse.core.internal.expressions.ReferenceExpression.evaluate(ReferenceExpression.java:74) 
        at org.eclipse.core.internal.expressions.CompositeExpression.evaluateOr(CompositeExpression.java:69) 
        at org.eclipse.core.internal.expressions.OrExpression.evaluate(OrExpression.java:25) 
        at org.eclipse.ui.internal.handlers.HandlerProxy.setEnabled(HandlerProxy.java:228) 
        at org.eclipse.ui.internal.handlers.E4HandlerProxy.setEnabled(E4HandlerProxy.java:134) 
        at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source) 
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
        at java.lang.reflect.Method.invoke(Method.java:498) 
        at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58) 
        at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:320) 
        at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:254) 
        at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:164) 
        at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.setEnabled(HandlerServiceHandler.java:84) 
        at org.eclipse.core.commands.Command.setEnabled(Command.java:865) 
        at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.canExecute(HandlerServiceImpl.java:179) 
        at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.canExecuteItem(HandledContributionItem.java:451) 
        at org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem$1.run(AbstractContributionItem.java:516) 
        at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) 
        at org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem.updateItemEnablement(AbstractContributionItem.java:557) 
        at org.eclipse.e4.ui.workbench.renderers.swt.ToolItemUpdater.updateContributionItems(ToolItemUpdater.java:40) 
        at org.eclipse.e4.ui.workbench.renderers.swt.ToolBarManagerRenderer$1.changed(ToolBarManagerRenderer.java:355) 
        at org.eclipse.e4.core.internal.contexts.TrackableComputationExt.update(TrackableComputationExt.java:117) 
        at org.eclipse.e4.core.internal.contexts.EclipseContext.processScheduled(EclipseContext.java:365) 
        at org.eclipse.e4.core.internal.contexts.EclipseContext.dispose(EclipseContext.java:189) 
        at org.eclipse.e4.ui.internal.workbench.swt.ShellActivationListener.lambda$0(ShellActivationListener.java:186) 
        at org.eclipse.e4.ui.internal.workbench.swt.ShellActivationListener$$Lambda$479/1994004868.widgetDisposed(Unknown Source) 
        at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:127) 
        at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89) 
        at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4292) 
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1512) 
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1535) 
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1516) 
        at org.eclipse.swt.widgets.Widget.release(Widget.java:1353) 
        at org.eclipse.swt.widgets.Control.release(Control.java:2961) 
        at org.eclipse.swt.widgets.Widget.dispose(Widget.java:694) 
        at org.eclipse.jface.window.Window.close(Window.java:333) 
        at org.eclipse.jface.dialogs.Dialog.close(Dialog.java:993) 
        at org.eclipse.jface.dialogs.Dialog.cancelPressed(Dialog.java:485) 
        at org.eclipse.jface.dialogs.Dialog.buttonPressed(Dialog.java:471) 
        at org.eclipse.jface.dialogs.Dialog.lambda$0(Dialog.java:622) 
        at org.eclipse.jface.dialogs.Dialog$$Lambda$597/1475167719.accept(Unknown Source) 
        at org.eclipse.swt.events.SelectionListener$1.widgetSelected(SelectionListener.java:84) 
        at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:252) 
        at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89) 
        at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4292) 
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1512) 
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1535) 
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1520) 
        at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1324) 
        at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4116) 
        at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3733) 
        at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1173) 
        at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339) 
        at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1062) 
        at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156) 
        at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:628) 
        at org.eclipse.ui.internal.Workbench$$Lambda$22/351249017.run(Unknown Source) 
        at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339) 
        at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:563) 
        at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:151) 
        at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:155) 
        at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:199) 
        at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137) 
        at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107) 
        at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:391) 
        at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:246) 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
        at java.lang.reflect.Method.invoke(Method.java:498) 
        at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659) 
        at org.eclipse.equinox.launcher.Main.basicRun(Main.java:595) 
        at org.eclipse.equinox.launcher.Main.run(Main.java:1501)