Optimise calcuation of disjoint features

qgis · Sep 10, 2017 · 2a88a5a · 2a88a5a
1 parent 6d94e6f
commit 2a88a5a
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/src/core/processing/qgsnativealgorithms.cpp b/src/core/processing/qgsnativealgorithms.cpp
@@ -1450,6 +1450,11 @@ void QgsLocationBasedAlgorithm::process( QgsFeatureSource *targetSource,
         // already added this one, no need for further tests
         continue;
       }
+      if ( predicates.count() == 1 && predicates.at( 0 ) == Disjoint && !disjointSet.contains( testFeature.id() ) )
+      {
+        // calculating only the disjoint set, and we've already eliminated this feature so no need for further tests
+        continue;
+      }
 
       if ( !engine )
       {