Don't call BATpreload_ a gazillion times (once for each tuple being multi-joined), but call it once before we start joining. This seriously improves the speed of the M4 decimal test which caused the BATpreload to be called 10e6 times for a bat instead of only once.
Don't call BATpreload_ a gazillion times (once for each tuple being
multi-joined), but call it once before we start joining.
This seriously improves the speed of the M4 decimal test which caused
the BATpreload to be called 10e6 times for a bat instead of only once.

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb