[Qgis-user] QGIS project slow to open when too much wms layers

[aperi2007]

Of course,
but the result of the parsing of the getcapabilities response is an 
umpredictable set of results.
So it is very hard to store in a structured cache (aka a db).

In a response capabilities of a wms 3.0 thereis many information , all 
in multeplicitly N. And often optionally.
Also there the more complex of could be have a response "version=1.0", 
"or "version=1.1" or "version=1.1.1" or "version=1.3.0" changing the 
version mean changind the structure of the information and their structure.
So project a cache capacle to host in a structured structure the 
information extracted from a parsing for all four kind of version is 
really an huge work.

And all of this for a getcapabilites that more probably is absolutelly 
unuseful when start a project.
:)

A.



Il 06/12/2015 14:52, Sandro Santilli ha scritto:
> On Sun, Dec 06, 2015 at 02:31:52PM +0100, aperi2007 wrote:
>
>> Also I guess a the time lost is not only the request/response time, but also
>> the parsing time of the response.
>> A cache do not help on this.
> It can ! Depending on what you cache, you may save
> either (or both) download and parse time.
>
> An URL could be mapped to a parsed content.
> Or a content hash could be mapped to a parsed content.
> Or both, to allow for caches of different lifetime.
>
> --strk;