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optimize UnionScope.create in case of 2 scopes (avoid creation and usages of THashSet)

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GitOrigin-RevId: c8da2df73d0cc2e37f5fd4301c204cddadfb5ad6
This commit is contained in:
Dmitry Batkovich
2020-10-22 12:10:29 +00:00
committed by intellij-monorepo-bot
parent 474b4eafe4
commit 466b4fa1c6
1 changed files with 37 additions and 0 deletions
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platform/core-api/src/com/intellij/psi/search/GlobalSearchScope.java
+37
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@@ -16,6 +16,7 @@ import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.util.ArrayUtil;
import com.intellij.util.ObjectUtils;
import com.intellij.util.containers.ContainerUtil;
import gnu.trove.THashSet;
import org.jetbrains.annotations.*;
@@ -493,6 +494,10 @@ public abstract class GlobalSearchScope extends SearchScope implements ProjectAw
@NotNull
static GlobalSearchScope create(GlobalSearchScope @NotNull [] scopes) {
if (scopes.length == 2) {
GlobalSearchScope unionScope = tryCreateUnionFor2Scopes(scopes);
if (unionScope != null) return unionScope;
}
Set<GlobalSearchScope> result = new THashSet<>(scopes.length);
Project project = null;
for (GlobalSearchScope scope : scopes) {
@@ -511,6 +516,38 @@ public abstract class GlobalSearchScope extends SearchScope implements ProjectAw
return new UnionScope(project, result.toArray(EMPTY_ARRAY));
}
@Nullable
private static GlobalSearchScope tryCreateUnionFor2Scopes(GlobalSearchScope @NotNull [] scopes) {
assert scopes.length == 2;
GlobalSearchScope scope0 = scopes[0];
GlobalSearchScope scope1 = scopes[1];
if (scope0 == EMPTY_SCOPE) return scope1;
if (scope1 == EMPTY_SCOPE) return scope0;
if (scope0 instanceof UnionScope && scope1 instanceof UnionScope) return null;
Project project = ObjectUtils.chooseNotNull(scope0.getProject(), scope1.getProject());
if (scope0 instanceof UnionScope) {
return unionWithUnionScope(scope0, scope1, project);
}
if (scope1 instanceof UnionScope) {
return unionWithUnionScope(scope1, scope0, project);
}
return new UnionScope(project, scopes);
}
@NotNull
private static GlobalSearchScope unionWithUnionScope(GlobalSearchScope scope0, GlobalSearchScope scope1, Project project) {
GlobalSearchScope[] scopes0 = ((UnionScope)scope0).myScopes;
if (ArrayUtil.contains(scope1, scopes0)) {
return scope0;
}
else {
return new UnionScope(project, ArrayUtil.append(scopes0, scope1));
}
}
private UnionScope(Project project, GlobalSearchScope @NotNull [] scopes) {
super(project);
myScopes = scopes;