[imp] Improving IMP message load times

[Mat Cantin]

Sound like imapproxy is what I'm looking for. The 3 seconds come from  
having to establish a new connection everytime a message is checked.  
Funny the solution was right under my nose. Thanks!

Would it make sense to incorporate imapproxy right into the IMP  
install? Seems like something a lot of people would use by default.

-- 
Mat



Quoting Michael M Slusarz <slusarz at horde.org>:

> Quoting Mat Cantin <mat at cantinbrothers.ca>:
>
>> Greetings,
>>
>> I currently have Horde4 groupmail installed and operational on  
>> Lighttpd with the Dovecot IMAP backend for email and  
>> authentication. I've been working on trying to improve IMP's  
>> performance when loading new messages that have not yet been viewed  
>> and cached. I've been able to get it down to about 3 seconds, which  
>> I understand is pretty typical because that's how long it takes to  
>> establish a new IMAP session and download the message.
>
> 3 seconds?  According to Firebug, it took 453ms total to view your  
> message, from the initial browser request to receiving the full  
> response from the server (granted, my mail server is located about  
> 25 feet away in my basement, so network latency is essentially zero,  
> but still...)
>
> You are using the dynamic view right?  Traditional view will take  
> much longer because it needs to rebuild the entire page on every  
> view (and it is even worse if you have the sidebar open).  Dynamic  
> view only needs to prepare the message view data when viewing a  
> message.
>
>> Although 3 seconds is good, when my users want to look through  
>> several new messages quickly, it's really not that great,  
>> especially when comparing the performance with Google Mail and  
>> Outlook Web Access.
>
> Have you tried the recommendations in imp/docs/PERFORMANCE?   
> Specifically using imapproxy?
>
>> Getting to the point, I've noticed that once a message has been  
>> viewed and cached, going back to that message later is  
>> instantaneous. Does anyone know if it's possible to configure IMP  
>> to pre-cache all the messages in the current view? Ideally, it  
>> could quickly load and show the user's message list and then  
>> proceed to download the messages in the background. I realize that  
>> this will obviously take more server resources, but that's a  
>> trade-off we can make.
>
> There should be no need to pre-cache.  500ms to view a message is  
> more than fast enough.
>
> michael
>
> ___________________________________
> Michael Slusarz [slusarz at horde.org]
>
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