unarist a1c54220e8 Optimize Status#permitted_for 500x (account timeline) (#5373)
The main change of this PR is removing `order by visibility` hack.

This was introduced to force using of `index_statuses_on_account_id` instead of PK index, but it seems no longer needed probably due to `index_statuses_on_account_id_id`. Removing this avoids reading all rows, so really improves first fetching of the user who has lot of statuses.

I have also changed JOIN to IN + subquery, which slightly faster in most cases.
2017-10-13 16:53:43 +02:00
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