Re: Limiting the amount of headers to download ?

[Sergio Villar Senin <svillar igalia com>]

Philip Van Hoof escribiu:
> On Mon, 2009-05-11 at 11:32 +0200, Sergio Villar Senin wrote:
>> Hi,
>>
>> it's easy to see how the average number of emails in user's inboxes has
>> dramatically increased especially after GMail's rise. Nowadays is quite
>> common to see users with 2000-3000 headers in their inboxes, and in a
>> near future 5000-6000 will be the average.
>>
>> Although memory consumption in tinymail is absolutely fantastic even
>> with those huge numbers we have to take into account that there are some
>> operations like sorting or searching, that are really very time
>> consuming in small devices due to the enormous processing power they
>> need. Even the "innocent" get_headers operation (in combination with the
>> use of a tree model) is a really heavy operation when performed for the
>> first time in huge inboxes.
>>
>> So taking into account that tinymail's main target are those
>> small/handheld devices I suggest to add a compiler option that when
>> enabled, will limit the amount of retrieved headers to some extent
>> (don't know yet, might be 1000 headers, or headers from last 2 months,
>> whatever... suggestions are welcomed)
>>
>> What do you think?
> 
> That Camel's IMAP synchronization wont allow you to do this.
> 
> Go ahead and try it, or read the code ;). You need the full hash of UID
> versus Sequence number of all messages, else the synchronization is
> completely foobar.
> 
> What you could do is fetch minimal information for the top (total - max)
> messages, and full information for the tail (total - max) ones. 
> 
> I promise you this wont be easy, though.

I was thinking about doing it only for servers supporting IMAP SORT

BR