It takes a too long to load project task kanban view.
And ~85% of this time is spent in `ProjectTask._get_all_subtasks`,
which is a recursive method returning the children of the children,
while any, of the task, for each task, just to display their count.
We replaced this recursive method with a SQL request,
which is way faster. Also, it can be called in batch.
It will return a dict {id: subtask_ids}.
task-3246085
closesodoo/odoo#117624
X-original-commit: 3b55936fed9ebdcfb8190437ad66c3e42c26b01c
Related: odoo/enterprise#39295
Signed-off-by: Xavier Bol (xbo) <xbo@odoo.com>
Audric Onockx (auon)
00b6a18225