diff --git a/idea/performanceTests/org/jetbrains/kotlin/idea/perf/AllKotlinLightClassTest.kt b/idea/performanceTests/org/jetbrains/kotlin/idea/perf/AllKotlinLightClassTest.kt
new file mode 100644
index 00000000000..f0ec8464b6a
--- /dev/null
+++ b/idea/performanceTests/org/jetbrains/kotlin/idea/perf/AllKotlinLightClassTest.kt
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.idea.perf
+
+import com.intellij.openapi.vfs.VirtualFile
+import org.jetbrains.kotlin.asJava.toLightClass
+import org.jetbrains.kotlin.cfg.pseudocode.containingDeclarationForPseudocode
+import org.jetbrains.kotlin.idea.refactoring.toPsiFile
+import org.jetbrains.kotlin.psi.KtClassOrObject
+import org.jetbrains.kotlin.psi.KtVisitorVoid
+import kotlin.system.measureNanoTime
+
+class AllKotlinLightClassTest : WholeProjectPerformanceTest(), WholeProjectKotlinFileProvider {
+
+    override fun doTest(file: VirtualFile): PerFileTestResult {
+        val results = mutableMapOf<String, Long>()
+        var totalNs = 0L
+
+        val psiFile = file.toPsiFile(project) ?: run {
+            return PerFileTestResult(results, totalNs, listOf(AssertionError("PsiFile not found for $file")))
+        }
+
+        val errors = mutableListOf<Throwable>()
+
+        val result = measureNanoTime {
+            try {
+                // Build light class by PsiFile
+                psiFile.acceptRecursively(object : KtVisitorVoid() {
+                    override fun visitClassOrObject(classOrObject: KtClassOrObject) {
+                        if (classOrObject.containingDeclarationForPseudocode != null) return
+                        val lightClass = classOrObject.toLightClass() ?: return
+                        lightClass.hashCode()
+                    }
+                })
+
+            } catch (t: Throwable) {
+                t.printStackTrace()
+                errors += t
+            }
+        }
+        results["LightClasses_Top"] = result
+        totalNs += result
+
+        return PerFileTestResult(results, totalNs, errors)
+    }
+}
\ No newline at end of file
diff --git a/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectFileProvider.kt b/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectFileProvider.kt
new file mode 100644
index 00000000000..323d5b3332e
--- /dev/null
+++ b/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectFileProvider.kt
@@ -0,0 +1,13 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.idea.perf
+
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.vfs.VirtualFile
+
+interface WholeProjectFileProvider {
+    fun provideFiles(project: Project): Collection<VirtualFile>
+}
\ No newline at end of file
diff --git a/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectInspectionTest.kt b/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectInspectionTest.kt
index 340dd8b849d..9bec8b6dd87 100644
--- a/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectInspectionTest.kt
+++ b/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectInspectionTest.kt
@@ -19,8 +19,6 @@ import kotlin.system.measureNanoTime
 
 abstract class WholeProjectInspectionTest : WholeProjectPerformanceTest() {
 
-    abstract override fun provideFiles(): Collection<VirtualFile>
-
     class ExceptionWhileInspection(inspectionId: String, cause: Throwable) : RuntimeException(inspectionId, cause)
 
     private lateinit var profileTools: List<Tools>
diff --git a/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectJavaInspectionTest.kt b/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectJavaInspectionTest.kt
index bca67e852ed..09898356c87 100644
--- a/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectJavaInspectionTest.kt
+++ b/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectJavaInspectionTest.kt
@@ -8,6 +8,7 @@ package org.jetbrains.kotlin.idea.perf
 import com.intellij.codeInspection.ex.Tools
 import com.intellij.ide.highlighter.JavaFileType
 import com.intellij.lang.java.JavaLanguage
+import com.intellij.openapi.project.Project
 import com.intellij.openapi.roots.ProjectFileIndex
 import com.intellij.openapi.vfs.VirtualFile
 import com.intellij.psi.search.DelegatingGlobalSearchScope
@@ -17,7 +18,7 @@ import org.jetbrains.kotlin.idea.util.ProjectRootsUtil
 
 class WholeProjectJavaInspectionTest : WholeProjectInspectionTest() {
 
-    override fun provideFiles(): Collection<VirtualFile> {
+    override fun provideFiles(project: Project): Collection<VirtualFile> {
         val scope = object : DelegatingGlobalSearchScope(ProjectScope.getContentScope(project)) {
             val index = ProjectFileIndex.getInstance(myProject)
             override fun contains(file: VirtualFile): Boolean {
diff --git a/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectKotlinFileProvider.kt b/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectKotlinFileProvider.kt
new file mode 100644
index 00000000000..cd3d92e07ba
--- /dev/null
+++ b/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectKotlinFileProvider.kt
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.idea.perf
+
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.vfs.VirtualFile
+import com.intellij.psi.search.FileTypeIndex
+import com.intellij.psi.search.ProjectScope
+import org.jetbrains.kotlin.idea.KotlinFileType
+import org.jetbrains.kotlin.idea.stubindex.KotlinSourceFilterScope
+
+interface WholeProjectKotlinFileProvider : WholeProjectFileProvider {
+    override fun provideFiles(project: Project): Collection<VirtualFile> {
+        val scope = KotlinSourceFilterScope.projectSources(ProjectScope.getContentScope(project), project)
+        return FileTypeIndex.getFiles(KotlinFileType.INSTANCE, scope)
+    }
+}
\ No newline at end of file
diff --git a/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectKotlinInspectionTest.kt b/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectKotlinInspectionTest.kt
index 8ab46363f53..612764acf1a 100644
--- a/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectKotlinInspectionTest.kt
+++ b/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectKotlinInspectionTest.kt
@@ -6,17 +6,7 @@
 package org.jetbrains.kotlin.idea.perf
 
 import com.intellij.codeInspection.ex.Tools
-import com.intellij.openapi.vfs.VirtualFile
-import com.intellij.psi.search.FileTypeIndex
-import com.intellij.psi.search.ProjectScope
-import org.jetbrains.kotlin.idea.KotlinFileType
-import org.jetbrains.kotlin.idea.stubindex.KotlinSourceFilterScope
-
-class WholeProjectKotlinInspectionTest : WholeProjectInspectionTest() {
-    override fun provideFiles(): Collection<VirtualFile> {
-        val scope = KotlinSourceFilterScope.projectSources(ProjectScope.getContentScope(project), project)
-        return FileTypeIndex.getFiles(KotlinFileType.INSTANCE, scope)
-    }
 
+class WholeProjectKotlinInspectionTest : WholeProjectInspectionTest(), WholeProjectKotlinFileProvider {
     override fun isEnabledInspection(tools: Tools) = tools.tool.language in setOf(null, "kotlin", "UAST")
 }
\ No newline at end of file
diff --git a/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectPerformanceTest.kt b/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectPerformanceTest.kt
index 56dff883c0a..964d6dedb7e 100644
--- a/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectPerformanceTest.kt
+++ b/idea/performanceTests/org/jetbrains/kotlin/idea/perf/WholeProjectPerformanceTest.kt
@@ -9,21 +9,14 @@ import com.intellij.codeInsight.daemon.DaemonAnalyzerTestCase
 import com.intellij.ide.impl.ProjectUtil
 import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.application.ex.ApplicationEx
-import com.intellij.openapi.vfs.VfsUtil
 import com.intellij.openapi.vfs.VirtualFile
 import com.intellij.psi.PsiElement
 import com.intellij.psi.PsiElementVisitor
-import com.intellij.psi.PsiFile
-import com.intellij.psi.PsiManager
-import com.intellij.psi.search.FileTypeIndex
-import com.intellij.psi.search.ProjectScope
-import org.jetbrains.kotlin.idea.KotlinFileType
-import org.jetbrains.kotlin.idea.stubindex.KotlinSourceFilterScope
 import java.io.File
 import java.io.PrintWriter
 import java.io.StringWriter
 
-abstract class WholeProjectPerformanceTest : DaemonAnalyzerTestCase() {
+abstract class WholeProjectPerformanceTest : DaemonAnalyzerTestCase(), WholeProjectFileProvider {
 
     private val rootProjectFile: File = File("../perfTestProject").absoluteFile
     private val statsFile: File = File("build/stats.csv").absoluteFile
@@ -43,8 +36,6 @@ abstract class WholeProjectPerformanceTest : DaemonAnalyzerTestCase() {
 
     protected abstract fun doTest(file: VirtualFile): PerFileTestResult
 
-    abstract fun provideFiles(): Collection<VirtualFile>
-
     fun testWholeProjectPerformance() {
 
         tcSuite(this::class.simpleName ?: "Unknown") {
@@ -67,7 +58,7 @@ abstract class WholeProjectPerformanceTest : DaemonAnalyzerTestCase() {
             }
 
             tcSuite("TotalPerFile") {
-                val files = provideFiles()
+                val files = provideFiles(project)
 
                 files.forEach {
                     val filePath = File(it.path).relativeTo(tmp).path.replace(File.separatorChar, '/')