tdf#125254 Performance: A spreadsheet opens too slow, part1

This takes the opening time from 55s to 48s for me.

Change-Id: Ia60fff33e9948e0bd6906c82b48aa30f8b2551bb
Reviewed-on: https://gerrit.libreoffice.org/72394
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

include/o3tl/sorted_vector.hxx

@@ -113,6 +113,11 @@ public:
         m_vector.clear();
     }
 
+    void swap(sorted_vector & other)
+    {
+        m_vector.swap(other.m_vector);
+    }
+
     void reserve(size_type amount)
     {
         m_vector.reserve(amount);

include/svl/listener.hxx

@@ -21,7 +21,7 @@
 
 #include <svl/svldllapi.h>
 
-#include <unordered_set>
+#include <o3tl/sorted_vector.hxx>
 
 class SvtBroadcaster;
 class SfxHint;
@@ -29,7 +29,7 @@ class SfxHint;
 class SVL_DLLPUBLIC SvtListener
 {
     friend class SvtBroadcaster;
-    typedef std::unordered_set<SvtBroadcaster*> BroadcastersType;
+    typedef o3tl::sorted_vector<SvtBroadcaster*> BroadcastersType;
     BroadcastersType maBroadcasters;
 
     const SvtListener&  operator=(const SvtListener &) = delete;

svl/source/notify/listener.cxx

@@ -43,7 +43,7 @@ SvtListener::~SvtListener() COVERITY_NOEXCEPT_FALSE
 
 bool SvtListener::StartListening( SvtBroadcaster& rBroadcaster )
 {
-    std::pair<BroadcastersType::iterator, bool> r =
+    std::pair<BroadcastersType::const_iterator, bool> r =
         maBroadcasters.insert(&rBroadcaster);
     if (r.second)
     {
@@ -55,7 +55,7 @@ bool SvtListener::StartListening( SvtBroadcaster& rBroadcaster )
 
 bool SvtListener::EndListening( SvtBroadcaster& rBroadcaster )
 {
-    BroadcastersType::iterator it = maBroadcasters.find(&rBroadcaster);
+    BroadcastersType::const_iterator it = maBroadcasters.find(&rBroadcaster);
     if (it == maBroadcasters.end())
         // Not listening to this broadcaster.
         return false;
@@ -69,7 +69,7 @@ bool SvtListener::EndListening( SvtBroadcaster& rBroadcaster )
 // back into the broadcaster again
 void SvtListener::BroadcasterDying( SvtBroadcaster& rBroadcaster )
 {
-    BroadcastersType::iterator it = maBroadcasters.find(&rBroadcaster);
+    BroadcastersType::const_iterator it = maBroadcasters.find(&rBroadcaster);
     if (it != maBroadcasters.end())
         maBroadcasters.erase(it);
 }