Greg Ma wrote:
> Hi,
> I am developping a little chat application with rails. On my chat page I
> make ajax request every 10 seconds to check if there are news messages.
> I think if I keep this thing with a lot of user my performance will get
> really low.
>

It shouldn't if you structure your queries efficiently

> How can I improve this? Is is possible to observe when a row is added?

Perhaps, but pushing to the browser is difficult or impossible.

> Or how can I effeciently cache the messages?
> 
> Thanks,
> Greg

You're doing premature optimization.  Worry about the bottlenecks when 
you can actually measure them, not when you're just speculating.

Best,
--
Marnen Laibow-Koser
http://www.marnen.org
[email protected]
-- 
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