From 2bc87aa69ec03df3998d356cd42d04807c1adc59 Mon Sep 17 00:00:00 2001
From: pasynkov <evgeny.pasynkov@jetbrains.com>
Date: Fri, 10 Feb 2017 19:37:25 +0100
Subject: [PATCH] Do not calculate language level for default project

---
 .../intellij/psi/impl/JavaPsiImplementationHelperImpl.java   | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/java/java-impl/src/com/intellij/psi/impl/JavaPsiImplementationHelperImpl.java b/java/java-impl/src/com/intellij/psi/impl/JavaPsiImplementationHelperImpl.java
index 2d1eb3c1bfcc..b7362bb24ce6 100644
--- a/java/java-impl/src/com/intellij/psi/impl/JavaPsiImplementationHelperImpl.java
+++ b/java/java-impl/src/com/intellij/psi/impl/JavaPsiImplementationHelperImpl.java
@@ -131,6 +131,11 @@ public class JavaPsiImplementationHelperImpl extends JavaPsiImplementationHelper
   public LanguageLevel getEffectiveLanguageLevel(@Nullable VirtualFile virtualFile) {
     if (virtualFile == null) return PsiUtil.getLanguageLevel(myProject);
 
+    // For default project, do not look into virtual file system.
+    // It is important for Upsource, where operations are done in default project to
+    // prevent expensive look-up into VFS
+    if (myProject.isDefault()) return PsiUtil.getLanguageLevel(myProject);
+
     final VirtualFile folder = virtualFile.getParent();
     if (folder != null) {
       final LanguageLevel level = folder.getUserData(LanguageLevel.KEY);