avoid comparing and extracting from fully substituted trees
avoid comparing and extracting from fully substituted trees

quasar-analytics/quasar,slamdata/quasar,jedesah/Quasar,quasar-analytics/quasar,slamdata/slamengine,quasar-analytics/quasar,slamdata/slamengine,jedesah/Quasar,jedesah/Quasar,quasar-analytics/quasar,djspiewak/quasar,slamdata/slamengine,jedesah/Quasar