ComponentStore itself uses transactions to commit components and flush on disk (if VFS is used)

platform/configuration-store-impl/src/ComponentStoreImpl.kt

@@ -138,7 +138,11 @@ abstract class ComponentStoreImpl : IComponentStore {
   internal abstract suspend fun doSave(result: SaveResult, isForceSavingAllSettings: Boolean)
 
   internal suspend fun createSaveSessionManagerAndSaveComponents(saveResult: SaveResult, isForceSavingAllSettings: Boolean): SaveSessionProducerManager {
-    return withContext(AppUIExecutor.onUiThread().coroutineDispatchingContext()) {
+    val uiExecutor = AppUIExecutor.onUiThread()
+    storageManager.componentManager?.let {
+      uiExecutor.inTransaction(it)
+    }
+    return withContext(uiExecutor.coroutineDispatchingContext()) {
       // todo should we call stopThreadPrioritizing? for some reasons stopThreadPrioritizing was not called by old code in ApplicationImpl/ProjectImpl save
       // probably because stopThreadPrioritizing is called on start write action (see ApplicationImpl.stopThreadPrioritizing)
       HeavyProcessLatch.INSTANCE.prioritizeUiActivity()

platform/configuration-store-impl/src/ProjectSaveSessionProducerManager.kt

@@ -24,7 +24,7 @@ internal class ProjectSaveSessionProducerManager(private val project: Project) :
       return SaveResult.EMPTY
     }
 
-    val saveResult = withContext(AppUIExecutor.onUiThread().inUndoTransparentAction().inWriteAction().coroutineDispatchingContext()) {
+    val saveResult = withContext(AppUIExecutor.onUiThread().inTransaction(project).inUndoTransparentAction().inWriteAction().coroutineDispatchingContext()) {
       val r = SaveResult()
       saveSessions(extraSessions, r)
       saveSessions(saveSessions, r)

platform/configuration-store-impl/src/ProjectStoreImpl.kt

@@ -363,7 +363,7 @@ private class ProjectWithModulesStoreImpl(project: Project, pathMacroManager: Pa
       return emptyList()
     }
 
-    return withContext(AppUIExecutor.onUiThread().coroutineDispatchingContext()) {
+    return withContext(AppUIExecutor.onUiThread().inTransaction(project).coroutineDispatchingContext()) {
       // do no create with capacity because very rarely a lot of modules will be modified
       val saveSessions: MutableList<SaveSession> = SmartList<SaveSession>()
       // commit components

platform/platform-impl/src/com/intellij/ide/SaveAndSyncHandlerImpl.kt

@@ -77,9 +77,7 @@ class SaveAndSyncHandlerImpl(private val settings: GeneralSettings) : SaveAndSyn
             }
           }
           else {
-            submitTransaction {
-              doSaveDocumentsAndProjectsAndAppInEdt()
-            }
+            doSaveDocumentsAndProjectsAndAppInEdt()
           }
         }
 
@@ -179,13 +177,8 @@ class SaveAndSyncHandlerImpl(private val settings: GeneralSettings) : SaveAndSyn
 
   override fun refreshOpenFiles() {
     val files = ArrayList<VirtualFile>()
-
     for (project in ProjectManager.getInstance().openProjects) {
-      for (file in FileEditorManager.getInstance(project).selectedFiles) {
-        if (file is NewVirtualFile) {
-          files.add(file)
-        }
-      }
+      FileEditorManager.getInstance(project).selectedFiles.filterTo(files) { it is NewVirtualFile }
     }
 
     if (!files.isEmpty()) {