for performance use processNames api for java symbol contributor

java/java-impl/src/com/intellij/ide/util/gotoByName/DefaultSymbolNavigationContributor.java

@@ -16,7 +16,7 @@
 package com.intellij.ide.util.gotoByName;
 
 import com.intellij.ide.util.DefaultPsiElementCellRenderer;
-import com.intellij.navigation.ChooseByNameContributor;
+import com.intellij.navigation.ChooseByNameContributorEx;
 import com.intellij.navigation.NavigationItem;
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.project.Project;
@@ -26,7 +26,9 @@ import com.intellij.psi.search.GlobalSearchScope;
 import com.intellij.psi.search.PsiShortNamesCache;
 import com.intellij.psi.util.PsiUtil;
 import com.intellij.util.ArrayUtil;
+import com.intellij.util.Processor;
 import com.intellij.util.containers.HashSet;
+import com.intellij.util.indexing.IdFilter;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
@@ -34,7 +36,7 @@ import java.util.Arrays;
 import java.util.Comparator;
 import java.util.List;
 
-public class DefaultSymbolNavigationContributor implements ChooseByNameContributor {
+public class DefaultSymbolNavigationContributor implements ChooseByNameContributorEx {
   private static final Logger LOG = Logger.getInstance("#com.intellij.ide.util.gotoByName.DefaultSymbolNavigationContributor");
 
   @Override
@@ -91,6 +93,13 @@ public class DefaultSymbolNavigationContributor implements ChooseByNameContribut
     return false;
   }
 
+  public void processNames(Processor<String> processor, GlobalSearchScope scope, IdFilter filter) {
+    PsiShortNamesCache cache = PsiShortNamesCache.getInstance(scope.getProject());
+    cache.processAllClassNames(processor, scope, filter);
+    cache.processAllFieldNames(processor, scope, filter);
+    cache.processAllMethodNames(processor, scope, filter);
+  }
+
   private static class MyComparator implements Comparator<PsiModifierListOwner>{
     public static final MyComparator INSTANCE = new MyComparator();
 

java/java-indexing-api/src/com/intellij/psi/search/PsiShortNamesCache.java

@@ -120,6 +120,14 @@ public abstract class PsiShortNamesCache {
 
   public abstract boolean processMethodsWithName(@NonNls @NotNull String name, @NotNull GlobalSearchScope scope, @NotNull Processor<PsiMethod> processor);
 
+  public boolean processAllMethodNames(Processor<String> processor, GlobalSearchScope scope, IdFilter filter) {
+    return ContainerUtil.process(getAllFieldNames(), processor);
+  }
+
+  public boolean processAllFieldNames(Processor<String> processor, GlobalSearchScope scope, IdFilter filter) {
+    return ContainerUtil.process(getAllFieldNames(), processor);
+  }
+
   /**
    * Returns the list of names of all methods in the project and
    * (optionally) libraries.

java/java-indexing-impl/src/com/intellij/psi/impl/CompositeShortNamesCache.java

@@ -116,6 +116,26 @@ public class CompositeShortNamesCache extends PsiShortNamesCache {
     return true;
   }
 
+  @Override
+  public boolean processAllMethodNames(Processor<String> processor, GlobalSearchScope scope, IdFilter filter) {
+    for (PsiShortNamesCache cache : myCaches) {
+      if (!cache.processAllMethodNames(processor, scope, filter)) {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  @Override
+  public boolean processAllFieldNames(Processor<String> processor, GlobalSearchScope scope, IdFilter filter) {
+    for (PsiShortNamesCache cache : myCaches) {
+      if (!cache.processAllFieldNames(processor, scope, filter)) {
+        return false;
+      }
+    }
+    return true;
+  }
+
   @Override
   public void getAllClassNames(@NotNull HashSet<String> dest) {
     for (PsiShortNamesCache cache : myCaches) {

java/java-indexing-impl/src/com/intellij/psi/impl/PsiShortNamesCacheImpl.java

@@ -121,6 +121,16 @@ public class PsiShortNamesCacheImpl extends PsiShortNamesCache {
     return StubIndex.getInstance().processAllKeys(JavaStubIndexKeys.CLASS_SHORT_NAMES, processor, scope, filter);
   }
 
+  @Override
+  public boolean processAllMethodNames(Processor<String> processor, GlobalSearchScope scope, IdFilter filter) {
+    return StubIndex.getInstance().processAllKeys(JavaStubIndexKeys.METHODS, processor, scope, filter);
+  }
+
+  @Override
+  public boolean processAllFieldNames(Processor<String> processor, GlobalSearchScope scope, IdFilter filter) {
+    return StubIndex.getInstance().processAllKeys(JavaStubIndexKeys.FIELDS, processor, scope, filter);
+  }
+
   @Override
   @NotNull
   public PsiMethod[] getMethodsByName(@NotNull String name, @NotNull final GlobalSearchScope scope) {