[Vtigercrm-developers] Shared Calendar performance

[Alan Bell]

this is much better in 6.3.0 it requests all the data at once for the 
shared calendar. Individual calendars are one request per event type, 
but that isn't much of a problem.

Alan.

On 19/01/15 14:57, Alan Bell wrote:
> Hi all,
>
> at the moment the shared calendar in vtiger does one request per 
> person to get the events, so if you have 20 people in the calendar 
> that is 20 POST requests to vtiger, with form data like:
>
> module:Calendar
> action:Feed
> start:2013-12-29
> end:2014-02-09
> type:Events
> userid:70
> color:#7e5c1d
> textColor:white
>
> browsers have a limit of 6 parallel requests per server (the RFC says 
> it should only be 2) and this isn't going to change (Google say that 
> if it is a problem then your web application is broken, not their 
> browser), this means that it can't get the data for more than 6 people 
> until one of the first requests has come back, this means that if you 
> have more than 6 people on the calendar it starts to slow down rather 
> a lot.
> You also don't get any clue that anything is happening until they all 
> show up at once. This is because around line 925 of 
> libraries/fullcalendar/fullcalendar.js there is a little bit of code 
> that stops it rendering the calendar until the count of pending 
> requests is zero. Commenting out the if statement like this:
>
>                                 //if (!pendingSourceCnt) {
>                                         reportEvents(cache);
>                                 //}
>
> makes it render the calendars progressively. It isn't any faster 
> overall, but it looks more responsive. At the moment it does ajax 
> requests to progressively get the data, but it doesn't show the user 
> anything until all the data has arrived, which in my opinion is not 
> really doing ajax properly.
>
> The real solution to this is to have a multi-id feed request for the 
> calendar, so it does one request containing an array of IDs and 
> colours and this gets processed on the server and there is a single 
> response with all of the data. Is this something that is going to 
> happen in a future release or should I crack on and write it in this one?
>
> Alan.
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