Better map lookup

ptitjano · Jan 22, 2024 · cfbb13f · cfbb13f
1 parent a5ef140
commit cfbb13f
Showing 1 changed file with 7 additions and 4 deletions.
diff --git a/src/core/proj/qgscoordinatetransformcontext.cpp b/src/core/proj/qgscoordinatetransformcontext.cpp
@@ -144,14 +144,17 @@ QString QgsCoordinateTransformContext::calculateCoordinateOperation( const QgsCo
     return QString();
 
   d->mLock.lockForRead();
-  QgsCoordinateTransformContextPrivate::OperationDetails res = d->mSourceDestDatumTransforms.value( qMakePair( source, destination ), QgsCoordinateTransformContextPrivate::OperationDetails() );
-  if ( res.operation.isEmpty() )
+
+  auto it = d->mSourceDestDatumTransforms.constFind( qMakePair( source, destination ) );
+  if ( it == d->mSourceDestDatumTransforms.constEnd() )
   {
     // try to reverse
-    res = d->mSourceDestDatumTransforms.value( qMakePair( destination, source ), QgsCoordinateTransformContextPrivate::OperationDetails() );
+    it = d->mSourceDestDatumTransforms.constFind( qMakePair( destination, source ) );
   }
+
+  const QString result = it == d->mSourceDestDatumTransforms.constEnd() ? QString() : it.value().operation;
   d->mLock.unlock();
-  return res.operation;
+  return result;
 }
 
 bool QgsCoordinateTransformContext::allowFallbackTransform( const QgsCoordinateReferenceSystem &source, const QgsCoordinateReferenceSystem &destination ) const