Performance degradation with lombok

[snjeza]

The related issue - redhat-developer/vscode-java#4052

Steps to reproduce:

• install m2e if you use Eclipse
• start Eclipse/VS Code/Cursor with the "-javaagent:<path_to_lombok-1.18.42.jar>" JVM argument
• import https://github.com/ipkiss42/vscode-java-4052
• edit, save SampleJavaClass without changing sampleMethod

Check CPU and Java stack traces.
cc @rgrunber @fbricon

[iloveeclipse]

Is this a regression? If yes, in which Eclipse version?

Check CPU and Java stack traces.

Could you provide details? What exactly shows CPU and Java stack traces?

[snjeza]

Is this a regression? If yes, in which Eclipse version?

No, this isn’t a regression. The issue has been happening since Eclipse 3.0.

Could you provide details? What exactly shows CPU and Java stack traces?

The CPU usage is always at 100%. The following is an example of java stack trace:

Stack trace

"org.eclipse.jdt.internal.ui.text.JavaReconciler" #95 [120997] daemon prio=1 os_prio=0 cpu=13284.50ms elapsed=63.05s tid=0x00007f31444afb00 nid=120997 runnable [0x00007f30a77f9000] java.lang.Thread.State: RUNNABLE at org.eclipse.jdt.internal.compiler.parser.Scanner.getNextToken0(Scanner.java:1284) at org.eclipse.jdt.internal.compiler.parser.Scanner.getNextToken(Scanner.java:1227) at org.eclipse.jdt.core.dom.DefaultCommentMapper.storeLeadingComments(DefaultCommentMapper.java:369) at org.eclipse.jdt.core.dom.DefaultCommentMapper$CommentMapperVisitor.visitNode(DefaultCommentMapper.java:588) at org.eclipse.jdt.core.dom.DefaultASTVisitor.visit(DefaultASTVisitor.java:777) at org.eclipse.jdt.core.dom.ReturnStatement.accept0(ReturnStatement.java:126) at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:3312) at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:3383) at org.eclipse.jdt.core.dom.Block.accept0(Block.java:128) at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:3312) at org.eclipse.jdt.core.dom.ASTNode.acceptChild(ASTNode.java:3360) at org.eclipse.jdt.core.dom.MethodDeclaration.accept0(MethodDeclaration.java:676) at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:3312) at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:3383) at org.eclipse.jdt.core.dom.TypeDeclaration.accept0(TypeDeclaration.java:497) at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:3312) at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:3383) at org.eclipse.jdt.core.dom.CompilationUnit.accept0(CompilationUnit.java:257) at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:3312) at org.eclipse.jdt.core.dom.DefaultCommentMapper.initialize(DefaultCommentMapper.java:247) at org.eclipse.jdt.core.dom.CompilationUnit.initCommentMapper(CompilationUnit.java:755) at org.eclipse.jdt.core.dom.ASTConverter.convert(ASTConverter.java:1588) at org.eclipse.jdt.core.dom.AST.convertCompilationUnit(AST.java:710) at org.eclipse.jdt.internal.core.CompilationUnit.buildStructure(CompilationUnit.java:284) at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:250) at org.eclipse.jdt.internal.core.JavaElement.openWhenClosed(JavaElement.java:571) at org.eclipse.jdt.internal.core.CompilationUnit.makeConsistent(CompilationUnit.java:1257) at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.makeConsistent(ReconcileWorkingCopyOperation.java:182) at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.executeOperation(ReconcileWorkingCopyOperation.java:108) 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:1431) at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy.reconcile(JavaReconcilingStrategy.java:132) at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy$1.run(JavaReconcilingStrategy.java:94) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:47) at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy.reconcile(JavaReconcilingStrategy.java:91) at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy.reconcile(JavaReconcilingStrategy.java:158) at org.eclipse.jdt.internal.ui.text.CompositeReconcilingStrategy.reconcile(CompositeReconcilingStrategy.java:94) at org.eclipse.jdt.internal.ui.text.JavaCompositeReconcilingStrategy.reconcile(JavaCompositeReconcilingStrategy.java:107) at org.eclipse.jface.text.reconciler.MonoReconciler.process(MonoReconciler.java:77) at org.eclipse.jface.text.reconciler.AbstractReconciler$BackgroundWorker.run(AbstractReconciler.java:201) at java.lang.Thread.runWith(java.base@21.0.9/Thread.java:1596) at java.lang.Thread.run(java.base@21.0.9/Thread.java:1583)