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From Richard Hirsch <>
Subject Re: Progress on new UI
Date Sat, 26 Dec 2009 21:55:17 GMT
But the new Twitter home page does have trending topics - probably not
changed in real-time though. Maybe we could have a tag cloud that
isn't comet-based.

On Wed, Dec 23, 2009 at 9:22 PM, Vassil Dichev <> wrote:
> Just to let you know, fetching messages from the public timeline is
> currently not cached. It probably doesn't make much sense either
> because it would then flood the cache too quickly with messages which
> are not likely to be requested again. This would result in messages
> being flushed from the cache too quickly.
> On neither of the popular microblogging sites (Twitter and
> is the public timeline updated in real-time. This makes sense because
> the performance overhead is significant and the benefit fairly small.
> In light of the recent performance benchmarks I'm not sure it's wise
> to update the public timeline in real-time. Maybe some sampling would
> emulate real-time reasonably well?
> Anyway, sending 20 messages instead of 1 would might waste some
> bandwidth, but will not cause such a performance overhead as hitting
> the DB.
> Finally, the tag clouds you see on the main page are currently based
> on the friends' timeline, so it is not the same for different users.
> It could be generated out of the last messages of the public
> timeline, but then it's all again about fetching the messages.
> Not that I'm against having some real-time functionality on the front
> page, but I just wanted to note that this goes beyond what just the
> new UI involves.

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