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optimization: avoid unnecessary disk access operations

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This commit is contained in:
Eugene Zhuravlev
2014-05-21 19:58:55 +04:00
parent 09d78904b4
commit a092c29f4c
1 changed files with 13 additions and 5 deletions
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jps/jps-builders/src/org/jetbrains/jps/builders/java/dependencyView/Mappings.java
+13 -5
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@@ -2074,7 +2074,7 @@ public class Mappings {
@Override
public boolean execute(final int superClass) {
final TIntHashSet added = addedSuperClasses.get(superClass);
final TIntHashSet removed = removedSuperClasses.get(superClass);
TIntHashSet removed = removedSuperClasses.get(superClass);
final TIntHashSet old = myClassToSubclasses.get(superClass);
@@ -2085,12 +2085,20 @@ public class Mappings {
}
else {
boolean changed = false;
if (removed != null) {
changed |= old.removeAll(removed.toArray());
final int[] addedAsArray = added != null && !added.isEmpty()? added.toArray() : null;
if (removed != null && !removed.isEmpty()) {
if (addedAsArray != null) {
// optimization: avoid unnecessary changes in the set
removed = (TIntHashSet)removed.clone();
removed.removeAll(addedAsArray);
}
if (!removed.isEmpty()) {
changed = old.removeAll(removed.toArray());
}
}
if (added != null) {
changed |= old.addAll(added.toArray());
if (addedAsArray != null) {
changed |= old.addAll(addedAsArray);
}
if (changed) {