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optimisation: do not unite 650 modules unnecessarily

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This commit is contained in:
Alexey Kudravtsev
2016-03-15 13:35:15 +03:00
parent 76aa3389cf
commit 41fde69253
1 changed files with 14 additions and 3 deletions
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platform/indexing-impl/src/com/intellij/openapi/roots/impl/LibraryScopeCache.java
+14 -3
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@@ -1,5 +1,5 @@
/*
* Copyright 2000-2015 JetBrains s.r.o.
* Copyright 2000-2016 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -17,6 +17,7 @@ package com.intellij.openapi.roots.impl;
import com.intellij.openapi.components.ServiceManager;
import com.intellij.openapi.module.Module;
import com.intellij.openapi.module.ModuleManager;
import com.intellij.openapi.module.impl.scopes.JdkScope;
import com.intellij.openapi.module.impl.scopes.LibraryRuntimeClasspathScope;
import com.intellij.openapi.project.Project;
@@ -28,6 +29,7 @@ import com.intellij.psi.search.GlobalSearchScope;
import com.intellij.util.ConcurrencyUtil;
import com.intellij.util.containers.ConcurrentFactoryMap;
import com.intellij.util.containers.ContainerUtil;
import gnu.trove.THashSet;
import gnu.trove.TObjectHashingStrategy;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
@@ -195,12 +197,21 @@ public class LibraryScopeCache {
return scope;
}
private GlobalSearchScope calcLibraryUseScope(List<OrderEntry> entries) {
@NotNull
private GlobalSearchScope calcLibraryUseScope(@NotNull List<OrderEntry> entries) {
List<GlobalSearchScope> united = ContainerUtil.newArrayList();
united.add(getLibrariesOnlyScope());
Set<Module> modulesInvolved = new THashSet<>(entries.size());
for (OrderEntry entry : entries) {
united.add(GlobalSearchScope.moduleWithDependentsScope(entry.getOwnerModule()));
Module ownerModule = entry.getOwnerModule();
united.add(GlobalSearchScope.moduleWithDependentsScope(ownerModule));
modulesInvolved.add(ownerModule);
}
// optimisation: if the library attached to all modules (often the case with JDK) then replace the 'union of all modules' scope with just 'project'
if (modulesInvolved.size() == ModuleManager.getInstance(myProject).getModules().length) {
return GlobalSearchScope.allScope(myProject);
}
return GlobalSearchScope.union(united.toArray(new GlobalSearchScope[united.size()]));
}