[vtk-developers] Add pugixml to VTK

[Patrick Bergeron]

Have you guys tried profiling what happens during those 2 minutes?

> On Jul 6, 2018, at 17:56, Elvis Stansvik <elvis.stansvik at orexplore.com> wrote:
> 
> 2018-07-06 23:26 GMT+02:00 Jonathan Borduas <jonathan.borduas at caboma.com>:
>> Hi,
>> 
>> Here’s a large xml (paraview statefile with 200+ sphere). It weighs 17.5 MB.
>> It takes 1-2 minutes to load with pugixml 1.4 on ParaView.
> 
> Alright. That shows the time of XML parsing is minuscule compared to
> other things in that use case. That file parses in < 400 ms with
> libxml2 here, and I guess pugixml would be even faster.
> 
> Elvis
> 
>> 
>> 
>> 
>> Best,
>> 
>> 
>> 
>> Jonathan Borduas
>> 
>> 
>> 
>> From: vtk-developers <vtk-developers-bounces at public.kitware.com> On Behalf
>> Of Dan Lipsa
>> Sent: Friday, July 06, 2018 4:59 PM
>> To: elvis.stansvik at orexplore.com
>> Cc: VTK Developers <vtk-developers at vtk.org>
>> Subject: Re: [vtk-developers] Add pugixml to VTK
>> 
>> 
>> 
>> 
>> 
>> 
>> Alright. Maybe this could actually benefit from being done in a
>> streaming fashion (à la libxml2's reader API)? Or will it be
>> beneficial/easier to have access to the whole DOM in memory?
>> 
>> 
>> 
>> You are right - it could be implemented in streaming fashion.
>> 
>> I think the trade off is
>> 
>> - streaming: slower than dom, less memory than dom, possibly more
>> complicated as you may need to store data for later.
>> 
>> - dom: quickest, more memory than streaming, simplest way to access citygml
>> data.
>> 
>> 
>> 
>> For now I lean toward dom as our input data is tiled to start with so I
>> don't expect really large files. I realize I have to revise the specs of the
>> problem:
>> 
>> I'll need to parse many medium size XML files.
>> 
>> Dan
>> 
>> 
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