Slow down during Claude Code session in parallel

[wowkin2]

Describe the bug
In PyCharm I exception in Image Diff plugin v1.11.0
IDE asked to send report to author, but wasn't able to do that, so decided to post here.
In parallel I had Claude Code running.

Desktop:

PyCharm 2025.3.2.1
Build #PY-253.30387.173, built on February 1, 2026
Source revision: a8022cf9f987d
Runtime version: 21.0.9+10-b1163.94 aarch64 (JCEF 137.0.17)
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Toolkit: sun.lwawt.macosx.LWCToolkit
macOS 26.3.1
GC: G1 Young Generation, G1 Concurrent GC, G1 Old Generation
Memory: 3072M
Cores: 8
Metal Rendering is ON

Additional context

stacktrace.txt

Freeze in EDT for 11 seconds
Sampled time: 2500ms, sampling rate: 100ms, GC time: 1575ms (25%), Class loading: 0%, CPU load: 18%

com.intellij.diagnostic.Freeze
	at java.base@21.0.9/java.util.zip.Inflater.inflateBytesBytes(Native Method)
	at java.base@21.0.9/java.util.zip.Inflater.inflate(Inflater.java:376)
	at java.base@21.0.9/java.util.zip.InflaterInputStream.read(InflaterInputStream.java:175)
	at java.base@21.0.9/java.io.BufferedInputStream.read1(BufferedInputStream.java:345)
	at java.base@21.0.9/java.io.BufferedInputStream.implRead(BufferedInputStream.java:420)
	at java.base@21.0.9/java.io.BufferedInputStream.read(BufferedInputStream.java:399)
	at java.base@21.0.9/java.io.DataInputStream.readFully(DataInputStream.java:208)
	at java.desktop/com.sun.imageio.plugins.png.PNGImageReader.decodePass(PNGImageReader.java:1243)
	at java.desktop/com.sun.imageio.plugins.png.PNGImageReader.decodeImage(PNGImageReader.java:1379)
	at java.desktop/com.sun.imageio.plugins.png.PNGImageReader.readImage(PNGImageReader.java:1519)
	at java.desktop/com.sun.imageio.plugins.png.PNGImageReader.read(PNGImageReader.java:1845)
	at java.desktop/javax.imageio.ImageIO.read(ImageIO.java:1466)
	at java.desktop/javax.imageio.ImageIO.read(ImageIO.java:1363)
	at de.ehmkah.projects.imgdiff.ImgDiffBaseBinaryDiffToolKt.contentCanBeRead(ImgDiffBaseBinaryDiffTool.kt:104)
	at de.ehmkah.projects.imgdiff.ImgDiffBaseBinaryDiffToolKt.isValidImage(ImgDiffBaseBinaryDiffTool.kt:95)
	at de.ehmkah.projects.imgdiff.ImgDiffBaseBinaryDiffTool.canShow(ImgDiffBaseBinaryDiffTool.kt:81)
	at com.intellij.diff.impl.DiffRequestProcessor.filterFittedTools(DiffRequestProcessor.java:305)
	at com.intellij.diff.impl.DiffRequestProcessor.findFittedTool(DiffRequestProcessor.java:289)
	at com.intellij.diff.impl.DiffRequestProcessor.lambda$doApplyRequest$6(DiffRequestProcessor.java:453)
	at com.intellij.diff.impl.DiffRequestProcessor$$Lambda/0x0000000506758948.run(Unknown Source)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeNonCancelableSection$3(CoreProgressManager.java:325)
	at com.intellij.openapi.progress.impl.CoreProgressManager$$Lambda/0x0000000503775ca8.compute(Unknown Source)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:792)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:748)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$computeInNonCancelableSection$4(CoreProgressManager.java:333)
	at com.intellij.openapi.progress.impl.CoreProgressManager$$Lambda/0x0000000503519880.compute(Unknown Source)
	at com.intellij.openapi.progress.Cancellation.computeInNonCancelableSection(Cancellation.java:144)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computeInNonCancelableSection(CoreProgressManager.java:333)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeNonCancelableSection(CoreProgressManager.java:324)
	at com.intellij.diff.impl.DiffRequestProcessor.lambda$doApplyRequest$7(DiffRequestProcessor.java:446)
	at com.intellij.diff.impl.DiffRequestProcessor$$Lambda/0x00000005067586f0.run(Unknown Source)
	at com.intellij.diff.util.DiffUtil.runPreservingFocus(DiffUtil.java:871)
	at com.intellij.diff.impl.DiffRequestProcessor.doApplyRequest(DiffRequestProcessor.java:434)
	at com.intellij.diff.impl.DiffRequestProcessor.doApplyRequest(DiffRequestProcessor.java:428)
	at com.intellij.diff.impl.DiffRequestProcessor.lambda$applyRequest$5(DiffRequestProcessor.java:412)
	at com.intellij.diff.impl.DiffRequestProcessor$$Lambda/0x0000000506758498.run(Unknown Source)
	at com.intellij.openapi.wm.impl.FocusManagerImpl.lambda$doWhenFocusSettlesDown$3(FocusManagerImpl.java:179)
	at com.intellij.openapi.wm.impl.FocusManagerImpl$$Lambda/0x00000005032de2c8.invoke(Unknown Source)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.doRunWriteIntentReadAction(NestedLocksThreadingSupport.kt:736)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.runPreventiveWriteIntentReadAction(NestedLocksThreadingSupport.kt:710)
	at com.intellij.openapi.wm.impl.FocusManagerImpl.lambda$doWhenFocusSettlesDown$5(FocusManagerImpl.java:178)
	at com.intellij.openapi.wm.impl.FocusManagerImpl$$Lambda/0x0000000502e8dba8.run(Unknown Source)
	at com.intellij.util.ui.EdtInvocationManager.invokeLaterIfNeeded(EdtInvocationManager.java:32)
	at com.intellij.openapi.wm.impl.FocusManagerImpl.doWhenFocusSettlesDown(FocusManagerImpl.java:173)
	at com.intellij.diff.impl.DiffRequestProcessor.applyRequest(DiffRequestProcessor.java:420)
	at com.intellij.diff.impl.DiffRequestProcessor.applyRequest(DiffRequestProcessor.java:399)
	at com.intellij.diff.impl.CacheDiffRequestProcessor.finishUpdate(CacheDiffRequestProcessor.java:143)
	at com.intellij.diff.impl.CacheDiffRequestProcessor.finishRequestLoading(CacheDiffRequestProcessor.java:132)
	at com.intellij.diff.impl.CacheDiffRequestProcessor.lambda$updateRequest$1(CacheDiffRequestProcessor.java:117)
	at com.intellij.diff.impl.CacheDiffRequestProcessor$$Lambda/0x0000000506758000.run(Unknown Source)
	at com.intellij.openapi.progress.util.BackgroundTaskUtil.finish(BackgroundTaskUtil.java:107)
	at com.intellij.openapi.progress.util.BackgroundTaskUtil.executeAndTryWait(BackgroundTaskUtil.java:95)
	at com.intellij.diff.util.DiffTaskQueue.executeAndTryWait(DiffTaskQueue.java:35)
	at com.intellij.diff.util.DiffTaskQueue.executeAndTryWait(DiffTaskQueue.java:26)
	at com.intellij.diff.impl.CacheDiffRequestProcessor.updateRequest(CacheDiffRequestProcessor.java:111)
	at com.intellij.diff.impl.CacheDiffRequestProcessor.updateRequest(CacheDiffRequestProcessor.java:79)
	at com.intellij.diff.impl.DiffRequestProcessor.updateRequest(DiffRequestProcessor.java:266)
	at com.intellij.diff.impl.DiffRequestProcessor.updateRequest(DiffRequestProcessor.java:261)
	at com.intellij.openapi.vcs.changes.ChangeViewDiffRequestProcessor.setCurrentChange(ChangeViewDiffRequestProcessor.java:233)
	at com.intellij.openapi.vcs.changes.ChangeViewDiffRequestProcessor.refresh(ChangeViewDiffRequestProcessor.java:215)
	at com.intellij.openapi.vcs.changes.ui.TreeHandlerChangesTreeTracker.refreshPreview(TreeHandlerDiffRequestProcessor.kt:145)
	at com.intellij.openapi.vcs.changes.ui.TreeHandlerChangesTreeTracker.updatePreview(TreeHandlerDiffRequestProcessor.kt:129)
	at com.intellij.openapi.vcs.changes.ui.TreeHandlerChangesTreeTracker.access$updatePreview(TreeHandlerDiffRequestProcessor.kt:54)
	at com.intellij.openapi.vcs.changes.ui.TreeHandlerChangesTreeTracker$PreviewUpdate.run(TreeHandlerDiffRequestProcessor.kt:166)
	at com.intellij.util.ui.update.Update.execute$suspendImpl(Update.kt:61)
	at com.intellij.util.ui.update.Update.execute(Update.kt)
	at com.intellij.util.ui.update.MergingUpdateQueue.executeUpdates$suspendImpl(MergingUpdateQueue.kt:396)
	at com.intellij.util.ui.update.MergingUpdateQueue.executeUpdates(MergingUpdateQueue.kt)
	at com.intellij.util.ui.update.MergingUpdateQueue$restart$1.invokeSuspend(MergingUpdateQueue.kt:355)
	at com.intellij.util.ui.update.MergingUpdateQueue$restart$1.invoke(MergingUpdateQueue.kt)
	at com.intellij.util.ui.update.MergingUpdateQueue$restart$1.invoke(MergingUpdateQueue.kt)
	at com.intellij.util.SingleAlarm$scheduleTask$1$1$1$2.invokeSuspend(SingleAlarm.kt:399)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:34)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:100)
	at com.intellij.openapi.application.impl.DispatchedRunnable.run(DispatchedRunnable.kt:42)
	at com.intellij.openapi.application.TransactionGuardImpl.runWithWritingAllowed(TransactionGuardImpl.java:239)
	at com.intellij.openapi.application.TransactionGuardImpl.access$100(TransactionGuardImpl.java:25)
	at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:221)
	at com.intellij.openapi.application.impl.NonBlockingFlushQueue.runNextEvent$lambda$1$1$0(NonBlockingFlushQueue.kt:334)
	at com.intellij.openapi.application.impl.NonBlockingFlushQueue$$Lambda/0x0000000502e14c58.compute(Unknown Source)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:901)
	at com.intellij.openapi.application.impl.NonBlockingFlushQueue.runNextEvent$lambda$1$1(NonBlockingFlushQueue.kt:333)
	at com.intellij.openapi.application.impl.NonBlockingFlushQueue$$Lambda/0x000000050241f220.invoke(Unknown Source)
	at com.intellij.concurrency.ThreadContext.resetThreadContext(threadContext.kt:294)
	at com.intellij.openapi.application.impl.NonBlockingFlushQueue.runNextEvent$lambda$1(NonBlockingFlushQueue.kt:330)
	at com.intellij.openapi.application.impl.NonBlockingFlushQueue$$Lambda/0x000000050241d870.invoke(Unknown Source)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.tryRunWriteIntentReadAction(NestedLocksThreadingSupport.kt:689)
	at com.intellij.openapi.application.impl.NonBlockingFlushQueue.runNextEvent(NonBlockingFlushQueue.kt:326)
	at com.intellij.openapi.application.impl.NonBlockingFlushQueue.flushNow(NonBlockingFlushQueue.kt:305)
	at com.intellij.openapi.application.impl.NonBlockingFlushQueue.FLUSH_NOW$lambda$0(NonBlockingFlushQueue.kt:167)
	at com.intellij.openapi.application.impl.NonBlockingFlushQueue$$Lambda/0x0000000502205208.run(Unknown Source)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:781)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:728)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:722)
	at java.base@21.0.9/java.security.AccessController.executePrivileged(AccessController.java:778)
	at java.base@21.0.9/java.security.AccessController.doPrivileged(AccessController.java:400)
	at java.base@21.0.9/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:750)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.kt:664)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.kt:517)
	at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$0$0$0(IdeEventQueue.kt:333)
	at com.intellij.ide.IdeEventQueue$$Lambda/0x00000005026b19a0.invoke(Unknown Source)
	at com.intellij.ide.IdeEventQueueKt.performActivity$lambda$1(IdeEventQueue.kt:1065)
	at com.intellij.ide.IdeEventQueueKt$$Lambda/0x00000005026b2098.run(Unknown Source)
	at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:109)
	at com.intellij.ide.IdeEventQueueKt.performActivity(IdeEventQueue.kt:1065)
	at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$0(IdeEventQueue.kt:331)
	at com.intellij.ide.IdeEventQueue$$Lambda/0x00000005026a99e0.run(Unknown Source)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.kt:371)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:207)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:92)

report-11s.txt

 java.awt.EventDispatchThread.run 2500ms
  java.awt.EventDispatchThread.pumpEvents 2500ms
   java.awt.EventDispatchThread.pumpEvents 2500ms
    java.awt.EventDispatchThread.pumpEventsForHierarchy 2500ms
     java.awt.EventDispatchThread.pumpEventsForFilter 2500ms
      java.awt.EventDispatchThread.pumpOneEventForFilters 2500ms
       com.intellij.ide.IdeEventQueue.dispatchEvent 2500ms
        com.intellij.ide.IdeEventQueue$$Lambda/0x00000005026a99e0.run 2500ms
         com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$0 2500ms
          com.intellij.ide.IdeEventQueueKt.performActivity 2500ms
           com.intellij.openapi.application.TransactionGuardImpl.performActivity 2500ms
            com.intellij.ide.IdeEventQueueKt$$Lambda/0x00000005026b2098.run 2500ms
             com.intellij.ide.IdeEventQueueKt.performActivity$lambda$1 2500ms
              com.intellij.ide.IdeEventQueue$$Lambda/0x00000005026b19a0.invoke 2500ms
               com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$0$0$0 2500ms
                com.intellij.ide.IdeEventQueue._dispatchEvent 2500ms
                 com.intellij.ide.IdeEventQueue.defaultDispatchEvent 2500ms
                  java.awt.EventQueue.dispatchEvent 2500ms
                   java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege 2500ms
                    java.security.AccessController.doPrivileged 2500ms
                     java.security.AccessController.executePrivileged 2500ms
                      java.awt.EventQueue$4.run 2500ms
                       java.awt.EventQueue$4.run 2500ms
                        java.awt.EventQueue.dispatchEventImpl 2500ms
                         java.awt.event.InvocationEvent.dispatch 2500ms
                          com.intellij.openapi.application.impl.NonBlockingFlushQueue$$Lambda/0x0000000502205208.run 2500ms
                           com.intellij.openapi.application.impl.NonBlockingFlushQueue.FLUSH_NOW$lambda$0 2500ms
                            com.intellij.openapi.application.impl.NonBlockingFlushQueue.flushNow 2500ms
                             com.intellij.openapi.application.impl.NonBlockingFlushQueue.runNextEvent 2500ms
                              com.intellij.platform.locking.impl.NestedLocksThreadingSupport.tryRunWriteIntentReadAction 2500ms
                               com.intellij.openapi.application.impl.NonBlockingFlushQueue$$Lambda/0x000000050241d870.invoke 2500ms
                                com.intellij.openapi.application.impl.NonBlockingFlushQueue.runNextEvent$lambda$1 2500ms
                                 com.intellij.concurrency.ThreadContext.resetThreadContext 2500ms
                                  com.intellij.openapi.application.impl.NonBlockingFlushQueue$$Lambda/0x000000050241f220.invoke 2500ms
                                   com.intellij.openapi.application.impl.NonBlockingFlushQueue.runNextEvent$lambda$1$1 2500ms
                                    com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized 2500ms
                                     com.intellij.openapi.application.impl.NonBlockingFlushQueue$$Lambda/0x0000000502e14c58.compute 2500ms
                                      com.intellij.openapi.application.impl.NonBlockingFlushQueue.runNextEvent$lambda$1$1$0 2500ms
                                       com.intellij.openapi.application.TransactionGuardImpl$2.run 2500ms
                                        com.intellij.openapi.application.TransactionGuardImpl.access$100 2500ms
                                         com.intellij.openapi.application.TransactionGuardImpl.runWithWritingAllowed 2500ms
                                          com.intellij.openapi.application.impl.DispatchedRunnable.run 2500ms
                                           kotlinx.coroutines.DispatchedTask.run 2500ms
                                            kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith 2500ms
                                             com.intellij.util.SingleAlarm$scheduleTask$1$1$1$2.invokeSuspend 2500ms
                                              com.intellij.util.ui.update.MergingUpdateQueue$restart$1.invoke 2500ms
                                               com.intellij.util.ui.update.MergingUpdateQueue$restart$1.invoke 2500ms
                                                com.intellij.util.ui.update.MergingUpdateQueue$restart$1.invokeSuspend 2500ms
                                                 com.intellij.util.ui.update.MergingUpdateQueue.executeUpdates 2500ms
                                                  com.intellij.util.ui.update.MergingUpdateQueue.executeUpdates$suspendImpl 2500ms
                                                   com.intellij.util.ui.update.Update.execute 2500ms
                                                    com.intellij.util.ui.update.Update.execute$suspendImpl 2500ms
                                                     com.intellij.openapi.vcs.changes.ui.TreeHandlerChangesTreeTracker$PreviewUpdate.run 2500ms
                                                      com.intellij.openapi.vcs.changes.ui.TreeHandlerChangesTreeTracker.access$updatePreview 2500ms
                                                       com.intellij.openapi.vcs.changes.ui.TreeHandlerChangesTreeTracker.updatePreview 2500ms
                                                        com.intellij.openapi.vcs.changes.ui.TreeHandlerChangesTreeTracker.refreshPreview 2500ms
                                                         com.intellij.openapi.vcs.changes.ChangeViewDiffRequestProcessor.refresh 2500ms
                                                          com.intellij.openapi.vcs.changes.ChangeViewDiffRequestProcessor.setCurrentChange 2500ms
                                                           com.intellij.diff.impl.DiffRequestProcessor.updateRequest 2500ms
                                                            com.intellij.diff.impl.DiffRequestProcessor.updateRequest 2500ms
                                                             com.intellij.diff.impl.CacheDiffRequestProcessor.updateRequest 2500ms
                                                              com.intellij.diff.impl.CacheDiffRequestProcessor.updateRequest 2500ms
                                                               com.intellij.diff.util.DiffTaskQueue.executeAndTryWait 2500ms
                                                                com.intellij.diff.util.DiffTaskQueue.executeAndTryWait 2500ms
                                                                 com.intellij.openapi.progress.util.BackgroundTaskUtil.executeAndTryWait 2500ms
                                                                  com.intellij.openapi.progress.util.BackgroundTaskUtil.finish 2500ms
                                                                   com.intellij.diff.impl.CacheDiffRequestProcessor$$Lambda/0x0000000506758000.run 2500ms
                                                                    com.intellij.diff.impl.CacheDiffRequestProcessor.lambda$updateRequest$1 2500ms
                                                                     com.intellij.diff.impl.CacheDiffRequestProcessor.finishRequestLoading 2500ms
                                                                      com.intellij.diff.impl.CacheDiffRequestProcessor.finishUpdate 2500ms
                                                                       com.intellij.diff.impl.DiffRequestProcessor.applyRequest 2500ms
                                                                        com.intellij.diff.impl.DiffRequestProcessor.applyRequest 2500ms
                                                                         com.intellij.openapi.wm.impl.FocusManagerImpl.doWhenFocusSettlesDown 2500ms
                                                                          com.intellij.util.ui.EdtInvocationManager.invokeLaterIfNeeded 2500ms
                                                                           com.intellij.openapi.wm.impl.FocusManagerImpl$$Lambda/0x0000000502e8dba8.run 2500ms
                                                                            com.intellij.openapi.wm.impl.FocusManagerImpl.lambda$doWhenFocusSettlesDown$5 2500ms
                                                                             com.intellij.platform.locking.impl.NestedLocksThreadingSupport.runPreventiveWriteIntentReadAction 2500ms
                                                                              com.intellij.platform.locking.impl.NestedLocksThreadingSupport.doRunWriteIntentReadAction 2500ms
                                                                               com.intellij.openapi.wm.impl.FocusManagerImpl$$Lambda/0x00000005032de2c8.invoke 2500ms
                                                                                com.intellij.openapi.wm.impl.FocusManagerImpl.lambda$doWhenFocusSettlesDown$3 2500ms
                                                                                 com.intellij.diff.impl.DiffRequestProcessor$$Lambda/0x0000000506758498.run 2500ms
                                                                                  com.intellij.diff.impl.DiffRequestProcessor.lambda$applyRequest$5 2500ms
                                                                                   com.intellij.diff.impl.DiffRequestProcessor.doApplyRequest 2500ms
                                                                                    com.intellij.diff.impl.DiffRequestProcessor.doApplyRequest 2500ms
                                                                                     com.intellij.diff.util.DiffUtil.runPreservingFocus 2500ms
                                                                                      com.intellij.diff.impl.DiffRequestProcessor$$Lambda/0x00000005067586f0.run 2500ms
                                                                                       com.intellij.diff.impl.DiffRequestProcessor.lambda$doApplyRequest$7 2500ms
                                                                                        com.intellij.openapi.progress.impl.CoreProgressManager.executeNonCancelableSection 2500ms
                                                                                         com.intellij.openapi.progress.impl.CoreProgressManager.computeInNonCancelableSection 2500ms
                                                                                          com.intellij.openapi.progress.Cancellation.computeInNonCancelableSection 2500ms
                                                                                           com.intellij.openapi.progress.impl.CoreProgressManager$$Lambda/0x0000000503519880.compute 2500ms
                                                                                            com.intellij.openapi.progress.impl.CoreProgressManager.lambda$computeInNonCancelableSection$4 2500ms
                                                                                             com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress 2500ms
                                                                                              com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun 2500ms
                                                                                               com.intellij.openapi.progress.impl.CoreProgressManager$$Lambda/0x0000000503775ca8.compute 2500ms
                                                                                                com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeNonCancelableSection$3 2500ms
                                                                                                 com.intellij.diff.impl.DiffRequestProcessor$$Lambda/0x0000000506758948.run 2500ms
                                                                                                  com.intellij.diff.impl.DiffRequestProcessor.lambda$doApplyRequest$6 2500ms
                                                                                                   com.intellij.diff.impl.DiffRequestProcessor.findFittedTool 2500ms
                                                                                                    com.intellij.diff.impl.DiffRequestProcessor.filterFittedTools 2500ms
                                                                                                     de.ehmkah.projects.imgdiff.ImgDiffBaseBinaryDiffTool.canShow 2500ms
                                                                                                      de.ehmkah.projects.imgdiff.ImgDiffBaseBinaryDiffToolKt.isValidImage 2500ms
                                                                                                       de.ehmkah.projects.imgdiff.ImgDiffBaseBinaryDiffToolKt.contentCanBeRead 2500ms
                                                                                                        javax.imageio.ImageIO.read 2500ms
                                                                                                         javax.imageio.ImageIO.read 2500ms
                                                                                                          com.sun.imageio.plugins.png.PNGImageReader.read 2500ms
                                                                                                           com.sun.imageio.plugins.png.PNGImageReader.readImage 2500ms
                                                                                                            com.sun.imageio.plugins.png.PNGImageReader.decodeImage 2400ms
                                                                                                             com.sun.imageio.plugins.png.PNGImageReader.decodePass 2400ms
                                                                                                              java.io.DataInputStream.readFully 1300ms
                                                                                                               java.io.BufferedInputStream.read 1300ms
                                                                                                                java.io.BufferedInputStream.implRead 1300ms
                                                                                                                 java.io.BufferedInputStream.read1 1300ms
                                                                                                                  java.util.zip.InflaterInputStream.read 1300ms
                                                                                                                   java.util.zip.Inflater.inflate 700ms
                                                                                                                    java.util.zip.Inflater.inflateBytesBytes 700ms
                                                                                                                   java.util.zip.InflaterInputStream.fill 600ms
                                                                                                                    java.io.SequenceInputStream.read 600ms
                                                                                                                     com.sun.imageio.plugins.common.InputStreamAdapter.read 600ms
                                                                                                                      com.sun.imageio.plugins.common.SubImageInputStream.read 600ms
                                                                                                                       javax.imageio.stream.FileCacheImageInputStream.read 600ms
                                                                                                                        javax.imageio.stream.FileCacheImageInputStream.readUntil 600ms
                                                                                                                         java.io.RandomAccessFile.write 600ms
                                                                                                                          java.io.RandomAccessFile.writeBytes 600ms
                                                                                                                           java.io.RandomAccessFile.implWriteBytes 600ms
                                                                                                                            sun.nio.ch.FileChannelImpl.write 600ms
                                                                                                                             sun.nio.ch.IOUtil.write 600ms
                                                                                                                              sun.nio.ch.IOUtil.write 600ms
                                                                                                                               sun.nio.ch.IOUtil.writeFromNativeBuffer 600ms
                                                                                                                                sun.nio.ch.UnixFileDispatcherImpl.write 600ms
                                                                                                                                 sun.nio.ch.UnixFileDispatcherImpl.write0 600ms
                                                                                                              com.sun.imageio.plugins.png.PNGImageReader.decodePaethFilter 700ms
                                                                                                              sun.awt.image.ByteInterleavedRaster.setRect 400ms
                                                                                                               sun.awt.image.ByteInterleavedRaster.setDataElements 400ms
                                                                                                                sun.awt.image.ByteInterleavedRaster.setDataElements 300ms
                                                                                                                 sun.awt.image.ByteInterleavedRaster.putByteData 300ms
                                                                                                                sun.awt.image.ByteInterleavedRaster.getDataElements 100ms
                                                                                                                 sun.awt.image.ByteInterleavedRaster.getByteData 100ms
                                                                                                            javax.imageio.ImageReader.getDestination 100ms
                                                                                                             javax.imageio.ImageTypeSpecifier.createBufferedImage 100ms
                                                                                                              java.awt.image.Raster.createWritableRaster 100ms
                                                                                                               java.awt.image.ComponentSampleModel.createDataBuffer 100ms
                                                                                                                java.awt.image.DataBufferByte.<init> 100ms

[ehmkah]

Thank you for your report. ARe you able to say with some words what you have done? Maybe images files are to large to to many in to short time?

[wowkin2]

Sorry for not adding more context, just wanted to publish report, so it won't be ignored if something obvious happening.
There was nothing special there anyway.
Probably about 30 images (near 2000x1000 resolution) were staged for commit.
In parallel Claude Code was running tests (probably those images were regenerated).
But that exception just happened and was unable to report.

[ehmkah]

okay. you mean images where changed by claude while old images were compared? Or prepared for comparing? No promise that i can reproduce it and fix but i will have a look into it. :-)

[wowkin2]

Don't actually remember, had no much time to investigate and then just disabled it because it was loading too long all together to see diff and continue work. Also popup about reporting issue was appearing many times until then.

But extension is really usefull to see what was changed before commit.