CoreData and insert in multithread

FROM : malcom
DATE : Wed Jan 30 23:25:47 2008

Hello guys. I'm working with core data and multithread. I need to save
a series of objects (each object can have parent and childs) inside a
store. I receive these object into a stream ordered (so I cannot
receive before child and then, one or more objects later childs)
I know if I try to insert object in a second thread I need to perform
a save in main thread in order to see these new objects. However this
operation can be expensive (because in order to link parent/childs I
need to perform a save for each new insertion). Is there a way to
avoid it and allows core data to see new insertion made in a second
thread?
TIA
malcom