After the previous fix introducing a deepcopy, the pregenerate of the assets became slower because of the many call to get_manifest (in loop, recursively) Since the manifest is immutable here and won't go outside of the call, we can use the lower level version. closes odoo/odoo#146602 X-original-commit: acb671f4d1b9c53c9e7d91414e847f26e8026ca3 Signed-off-by: Xavier Dollé (xdo) <xdo@odoo.com>