tdf#79877 perf loading docx file, writerfilter/ improvements

this improves load time by 20%.
We switch from shared_ptr to tools::SvRef to manage the objects

I noticed some double inheritance like this:
DomainMapper
LoggedProperties
Properties
SvRefBase
LoggedTable
Table
SvRefBase
so to be safe I made all the ref-count-base-class inheritance
virtual.

Change-Id: Ia3de9733f5c6966e8171f43d083dcc087040b8cd
Reviewed-on: https://gerrit.libreoffice.org/57022
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Noel Grandin <noel.grandin@collabora.co.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/writerfilter/source/dmapper/TagLogger.hxx b/writerfilter/source/dmapper/TagLogger.hxx
index b03da6cfcfe5..eb9bdc616e28 100644
--- a/writerfilter/source/dmapper/TagLogger.hxx
+++ b/writerfilter/source/dmapper/TagLogger.hxx
@@ -33,7 +33,7 @@ namespace writerfilter
     class TagLogger
     {
     private:
-        static std::shared_ptr<TagLogger> instance;
+        static tools::SvRef<TagLogger> instance;
 
         xmlTextWriterPtr pWriter;
         const char* pName;