It can be so slow that it appears Orange has crashed.
With @borondics we had a workshop in Berlin and preprocessing appeared to crash for most students. We thus downgraded to a previous version.
After debugging I saw that a series of preprocessors causes domain comparisons to be very long (for example, after normalization, each feature in turn references the whole original domain, and then equality checking just multiplies).
It can be so slow that it appears Orange has crashed.
With @borondics we had a workshop in Berlin and preprocessing appeared to crash for most students. We thus downgraded to a previous version.
After debugging I saw that a series of preprocessors causes domain comparisons to be very long (for example, after normalization, each feature in turn references the whole original domain, and then equality checking just multiplies).