I could not reproduce the behavior you described.
Irrespective of the number of TOs and how they are related (in line or in a tree), I always measure 1-2 seconds for creation of 1000 records and populating 2 fields in the main TO.
In your case: Is any of your TO refering to an external data source? Are there any complicated dependencies (calculation fields, complex relations, auto enter lookups, self-joins) that need to be recalculated by the DBMS upon record creation?
Hi Martin, many unstored calc fields from other table calc use data from the table in question, and this table has a self join on it. But this table doesn't contained unrelated calc to ther tables. I would have understood if that table hd field dependent of otehr table field but that's not the case.
It also happens in clone
there's also relation like this also
table A - Slow table - Table C