Sam 5c49009c6c
PERF: properly preload emails to speed up user exports (#12778)
scopes are incredibly annoying to preload, simply adding :user_emails is not
enough.

Instead of relying on scopes simply iterate through user_emails which is
properly preloaded.

This removes 2 * N+1 when generating user reports.
2021-04-21 10:42:07 +10:00
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