Re: [xml] performance of parsing docbook with xincludes

[Stefan Sauer <ensonic hora-obscura de>]

On 05/15/2018 12:42 PM, Nick Wellnhofer wrote:
> On 14/05/2018 21:48, Stefan Sauer wrote:
> > This part looks suspicious:
> >
> >                 |--22.98%--0xc2160
> >                 |          xmlFreeDoc
> >                 |          |
> >                 |           --22.42%--xmlFreeDtd
>
> > Can I tell it to not load dtds in the first place? Is it loading the
> > dtd for each an every xinclude?
>
> Good catch. It seems that the XInclude engine always parses included
> docs with XML_PARSE_DTDLOAD:
>
>     https://git.gnome.org/browse/libxml2/tree/xinclude.c#n450
>
> If you're not using XML catalogs, this will probably cause the DTD to
> be loaded over the network multiple times which could explain the
> slowdown.
>
> Can you try to change the line to
>
>     xmlCtxtUseOptions(pctxt, ctxt->parseFlags);
>
> and see if it helps?
>
> Nick

It does not help. I'll experiment further. Thanks for the recomendations.


Stefan