process_deletion_inverse() called inverse_index::remove_source(), which
walked every record in the file's inverse index to find the ones whose
source is the deleted instance: O(R) per deletion, the dominant cost of
file.remove() on large files now that the lookup side no longer re-sorts.
The records a deleted instance contributed are exactly the entity
references in its own attributes, so walk those with the same visitor
build_inverses_() uses for registration and remove each record with a
targeted binary search instead. remove_source() has no callers left and
is deleted.
Also use the ordered view of batch_deletion_ids_ (a boost multi_index
that already had one) for the is-this-referencer-also-being-deleted
check in process_deletion_(), which was a linear std::find over the
sequenced view: O(b) per referencing instance made batch deletion of b
instances quadratic.
file.remove on 300 IfcPropertySet of a 155 MB IFC4 model (201k IfcRoot)
drops from 3.15 ms to 0.17 ms per call, batched removal of 2000 from
3.34 ms to 0.17 ms per call, root.remove_product on 100 walls from
332 ms to 131 ms per call.
Claude-Session: https://claude.ai/code/session_01HNrXDmR88wKPCYwGE21SyH
(cherry picked from commit 938442303f)
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Dion Moult