timestamp.diff

 import java.util.{ Locale, Properties }
+import java.time.ZonedDateTime
+import java.time.format.DateTimeFormatter.ISO_LOCAL_DATE_TIME

 import sbt.BasicCommandStrings.{ Shell, TemplateCommand }
 import sbt.Project.LoadAction
@@ -37,6 +39,7 @@ import scala.util.control.NonFatal
 /** This class is the entry point for sbt. */
 final class xMain extends xsbti.AppMain {
   def run(configuration: xsbti.AppConfiguration): xsbti.MainResult = {
+    println(s"${ZonedDateTime.now.format(ISO_LOCAL_DATE_TIME)} xMain#run")

@@ -83,6 +86,7 @@ private[sbt] object xMainImpl {
     import BuiltinCommands.defaults
     import sbt.internal.CommandStrings.{ BootCommand, DefaultsCommand, InitCommand }
     import sbt.internal.client.NetworkClient
+    println(s"${ZonedDateTime.now.format(ISO_LOCAL_DATE_TIME)} xMainImpl#run")

   def runManaged(s: State): xsbti.MainResult = {
+    println(s"${ZonedDateTime.now.format(ISO_LOCAL_DATE_TIME)} StandardMain#runManaged")