Breadcrumb performance issue: enabling Breadcrumb makes Java editor very slow to type, even after restarting Eclipse

[kl0ck]

Steps to reproduce

• Enable breadcrumb. Open a big Java file (10000+ lines). Try to edit the file, move the cursor around, feel the lag.
• Disable breadcrumb and notice the lag disappeared.

Tested under this environment:

Eclipse IDE for Enterprise Java and Web Developers (includes Incubating components)
Version: 2024-12 (4.34.0)
Build id: 20241128-0757
OS: Windows 11

Here is some relevant log output

From <workspace>/.metadata/.log

!SUBENTRY 1 org.eclipse.ui.monitoring 1 0 2025-01-15 17:21:30.556
!MESSAGE Sample at 17:21:29.997 (+0,646s)
Thread 'main' tid=1 (RUNNABLE)
!STACK 0
Stack Trace
	at lombok.eclipse.EclipseNode.traverse(EclipseNode.java:133)
	at lombok.eclipse.EclipseAST.traverseChildren(EclipseAST.java:231)
	at lombok.eclipse.EclipseNode.traverse(EclipseNode.java:79)
	at lombok.eclipse.EclipseAST.traverseChildren(EclipseAST.java:231)
	at lombok.eclipse.EclipseNode.traverse(EclipseNode.java:74)
	at lombok.eclipse.EclipseAST.traverseChildren(EclipseAST.java:231)
	at lombok.eclipse.EclipseNode.traverse(EclipseNode.java:69)
	at lombok.eclipse.EclipseAST.traverse(EclipseAST.java:224)
	at lombok.eclipse.TransformEclipseAST.go(TransformEclipseAST.java:226)
	at lombok.eclipse.TransformEclipseAST.transform(TransformEclipseAST.java:187)
	at [email protected]/java.lang.invoke.DirectMethodHandle$Holder.invokeStatic(DirectMethodHandle$Holder)
	at [email protected]/java.lang.invoke.LambdaForm$MH/0x0000019759413c00.invoke(LambdaForm$MH)
	at [email protected]/java.lang.invoke.LambdaForm$MH/0x0000019758002400.invokeExact_MT(LambdaForm$MH)
	at [email protected]/jdk.internal.reflect.DirectMethodHandleAccessor.invokeImpl(DirectMethodHandleAccessor.java:155)
	at [email protected]/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at [email protected]/java.lang.reflect.Method.invoke(Method.java:580)
	at lombok.launch.PatchFixesHider$Util.invokeMethod(PatchFixesHider.java:146)
	at lombok.launch.PatchFixesHider$Transform.transform(PatchFixesHider.java:267)
	at org.eclipse.jdt.internal.compiler.parser.Parser.getMethodBodies(Parser.java:11446)
	at org.eclipse.jdt.internal.compiler.Compiler.process(Compiler.java:935)
	at org.eclipse.jdt.core.dom.CompilationUnitResolver.resolve(CompilationUnitResolver.java:1024)
	at org.eclipse.jdt.core.dom.CompilationUnitResolver.resolve(CompilationUnitResolver.java:728)
	at org.eclipse.jdt.core.dom.CompilationUnitResolver$ECJCompilationUnitResolver.resolve(CompilationUnitResolver.java:100)
	at org.eclipse.jdt.core.dom.ASTParser.createASTs(ASTParser.java:1004)
	at org.eclipse.jdt.apt.core.internal.env.BaseProcessorEnv.createASTs(BaseProcessorEnv.java:851)
	at org.eclipse.jdt.apt.core.internal.env.ReconcileEnv.openPipeline(ReconcileEnv.java:113)
	at org.eclipse.jdt.apt.core.internal.env.AbstractCompilationEnv.newReconcileEnv(AbstractCompilationEnv.java:98)
	at org.eclipse.jdt.apt.core.internal.APTDispatchRunnable.reconcile(APTDispatchRunnable.java:218)
	at org.eclipse.jdt.apt.core.internal.APTDispatchRunnable.runAPTDuringReconcile(APTDispatchRunnable.java:162)
	at org.eclipse.jdt.apt.core.internal.AptCompilationParticipant.reconcile(AptCompilationParticipant.java:271)
	at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation$1.run(ReconcileWorkingCopyOperation.java:314)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:47)
	at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.notifyParticipants(ReconcileWorkingCopyOperation.java:299)
	at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.executeOperation(ReconcileWorkingCopyOperation.java:113)
	at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:751)
	at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:816)
	at org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1419)
	at org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1378)
	at org.eclipse.jdt.internal.corext.util.JavaModelUtil.reconcile(JavaModelUtil.java:644)
	at org.eclipse.jdt.internal.ui.actions.SelectionConverter.getElementAtOffset(SelectionConverter.java:279)
	at org.eclipse.jdt.internal.ui.javaeditor.JavaEditorBreadcrumb.getCurrentInput(JavaEditorBreadcrumb.java:819)
	at org.eclipse.jdt.internal.ui.javaeditor.JavaEditorBreadcrumb.setInput(JavaEditorBreadcrumb.java:790)
	at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.setBreadcrumbInput(JavaEditor.java:2007)
	at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.selectionChanged(JavaEditor.java:2272)
	at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor$EditorSelectionChangedListener.selectionChanged(JavaEditor.java:310)
	at org.eclipse.jface.text.TextViewer.firePostSelectionChanged(TextViewer.java:2725)
	at org.eclipse.jface.text.TextViewer.firePostSelectionChanged(TextViewer.java:2655)
	at org.eclipse.jface.text.TextViewer.postSelectionChanged(TextViewer.java:2638)
	at org.eclipse.jface.text.TextViewer$$Lambda/0x0000019758c74880.run(Unknown Source)
	at org.eclipse.jface.util.Throttler.lambda$0(Throttler.java:66)
	at org.eclipse.jface.util.Throttler$$Lambda/0x00000197585798d8.run(Unknown Source)
	at org.eclipse.jface.util.Throttler.lambda$1(Throttler.java:79)
	at org.eclipse.jface.util.Throttler$$Lambda/0x0000019758579b00.run(Unknown Source)
	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:40)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:132)
	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4177)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3793)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1151)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1042)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:663)
	at org.eclipse.ui.internal.Workbench$$Lambda/0x0000019758252598.run(Unknown Source)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:570)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:173)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:178)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:208)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:143)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:109)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:439)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:271)
	at [email protected]/java.lang.invoke.DirectMethodHandle$Holder.invokeStatic(DirectMethodHandle$Holder)
	at [email protected]/java.lang.invoke.LambdaForm$MH/0x000001975801a800.invoke(LambdaForm$MH)
	at [email protected]/java.lang.invoke.LambdaForm$MH/0x0000019758002400.invokeExact_MT(LambdaForm$MH)
	at [email protected]/jdk.internal.reflect.DirectMethodHandleAccessor.invokeImpl(DirectMethodHandleAccessor.java:155)
	at [email protected]/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at [email protected]/java.lang.reflect.Method.invoke(Method.java:580)
	at app//org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:668)
	at app//org.eclipse.equinox.launcher.Main.basicRun(Main.java:605)
	at app//org.eclipse.equinox.launcher.Main.run(Main.java:1481)

[jukzi]

the stacktrace includes "lombok" which is not part of platform. Either create a reproducer without lombook or report to lombok.
For perfromance issues you should also add screenshot of callstack and hotspots from sampling with for example visualVm.

[kl0ck]

Ok, reported to Lombok: projectlombok/lombok#3809