add a performance test for creating constraints
add a performance test for creating constraints

fniephaus/babelsberg-js,fniephaus/babelsberg-js,babelsberg/babelsberg-js,psieg/babelsberg-js,babelsberg/babelsberg-js,fniephaus/babelsberg-js,psieg/babelsberg-js,babelsberg/babelsberg-js,babelsberg/babelsberg-js,fniephaus/babelsberg-js,psieg/babelsberg-js,psieg/babelsberg-js