report meaningful init times for subsequent runs when -Xrepeat flag is used

compiler/cli/src/org/jetbrains/kotlin/cli/common/CLICompiler.java

@@ -26,6 +26,7 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.kotlin.cli.common.arguments.CommonCompilerArguments;
 import org.jetbrains.kotlin.cli.common.messages.*;
+import org.jetbrains.kotlin.cli.jvm.K2JVMCompiler;
 import org.jetbrains.kotlin.cli.jvm.compiler.CompileEnvironmentException;
 import org.jetbrains.kotlin.config.CompilerConfiguration;
 import org.jetbrains.kotlin.config.Services;
@@ -156,6 +157,9 @@ public abstract class CLICompiler<A extends CommonCompilerArguments> {
             }
 
             for (int i = 0; i < repeatCount; i++) {
+                if (i > 0) {
+                    K2JVMCompiler.Companion.resetInitStartTime();
+                }
                 Disposable rootDisposable = Disposer.newDisposable();
                 try {
                     MessageSeverityCollector severityCollector = new MessageSeverityCollector(groupingCollector);

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/K2JVMCompiler.kt

@@ -51,7 +51,6 @@ import kotlin.platform.platformStatic
 
 SuppressWarnings("UseOfSystemOutOrSystemErr")
 public class K2JVMCompiler : CLICompiler<K2JVMCompilerArguments>() {
-    private val initStartNanos = System.nanoTime()
 
     override fun doExecute(arguments: K2JVMCompilerArguments, services: Services, messageCollector: MessageCollector, rootDisposable: Disposable): ExitCode {
         val messageSeverityCollector = MessageSeverityCollector(messageCollector)
@@ -221,6 +220,11 @@ public class K2JVMCompiler : CLICompiler<K2JVMCompilerArguments>() {
     }
 
     companion object {
+        private var initStartNanos = System.nanoTime()
+
+        public fun resetInitStartTime() {
+            initStartNanos = System.nanoTime()
+        }
 
         platformStatic public fun main(args: Array<String>) {
             CLICompiler.doMain(K2JVMCompiler(), args)