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Given we have 10,000 users, we should be able to fetch all users' statuses in 25 requests, resulting in about ~1.5s * 25 = ~37.5s if done synchronously. Splitting up the work into goroutines should work nicely since each request is completely independent from the others.
Using the Plugin API method GetUserStatusesByIds, we can fetch all of the relevant statuses in one RPC call, and only update a user's status if it needs to change.
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