Ver10.0.0 Integrated Master importing is now faster.

Integrated Master importing is now faster.
The effect is significant when there are large numbers of deletions during importing such as when data is refreshed.  With a given set of data, the import time was reduced to more than one tenth.
Example:
  Integrated Master with 720,000 items
    Before improvement: 240 minutes,
    After improvement: 20 minutes