As snapshots are costly to compute, we now create exactly two snapshots:
one initial snapshot and one final snapshot. All intermediate checks
are done with respect to the initial snapshot.
Note also that checks are costly for x2many fields. Therefore, once a
field has changed, it will never be checked again. This optimization is
correct since, by contract, the onchanges of a field are processed at
most once. This guarantees the absence of cycles in onchange.
For instance, assume that field A modifies fields B and C, and that
field C modifies fields D, E and F:
- before: 7 snapshots (snapshot, process A, snapshot, process B,
snapshot, process C, snapshot, process D, snapshot, process E,
snapshot, process F, snapshot)
- after: 2 snapshots (snapshot, process A, process B, process C,
process D, process E, process F, snapshot)
closesodoo/odoo#31872
Signed-off-by: Raphael Collet (rco) <rco@openerp.com>
Raphael Collet
f14ae73a98