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c9a93c0aeb
Stage timing showed prepare taking 96s for 1275 links (vs 0.31s for the batch dispatch itself). Root cause: _prepare_link_from_topology called add_link (dump=True default) and update_link_style/update_show_filters_icon (each unconditionally dump the full topology). 1275 links x serialize- and-write-the-whole-topology = the entire 96s. - add_link(..., dump=False): the project is dumped once at the end of open - set link._link_style / _show_filters_icon directly instead of the update_* helpers, which also avoids spurious 'link.updated' notifications before the link is finalised The final self.dump() at the end of project.open already persists everything.