sfx2 store: add API to allow avoiding the fsync of the output file

The use-case is when the consumer of the output file will read it right
after SfxBaseModel::storeToURL() returns, in which case an expensive
fsync is pointless.

Times for 100 hello world inputs: 8516 -> 2785 ms is spent in ODT-load + HTML
export + close (33% of original).

Change-Id: I05e424a43ebfeea363f82b57af60f5aaa28696b4
Reviewed-on: https://gerrit.libreoffice.org/47695
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>
(cherry picked from commit d03a754722980a4eaf14fce38d73ae23b604295b)

4 files changed, 21 insertions, 7 deletions

diff --git a/sfx2/sdi/sfx.sdi b/sfx2/sdi/sfx.sdi
index 659e3763bfd1..de632285788f 100644
--- a/sfx2/sdi/sfx.sdi
+++ b/sfx2/sdi/sfx.sdi
@@ -3538,7 +3538,7 @@ SfxVoidItem SaveAll SID_SAVEDOCS
 
 
 SfxStringItem SaveAs SID_SAVEASDOC
-(SfxStringItem URL SID_FILE_NAME,SfxStringItem FilterName SID_FILTER_NAME,SfxStringItem Password SID_PASSWORD,SfxBoolItem PasswordInteraction SID_PASSWORDINTERACTION,SfxStringItem FilterOptions SID_FILE_FILTEROPTIONS,SfxStringItem VersionComment SID_DOCINFO_COMMENTS,SfxStringItem VersionAuthor SID_DOCINFO_AUTHOR,SfxBoolItem Overwrite SID_OVERWRITE,SfxBoolItem Unpacked SID_UNPACK,SfxBoolItem SaveTo SID_SAVETO)
+(SfxStringItem URL SID_FILE_NAME,SfxStringItem FilterName SID_FILTER_NAME,SfxStringItem Password SID_PASSWORD,SfxBoolItem PasswordInteraction SID_PASSWORDINTERACTION,SfxStringItem FilterOptions SID_FILE_FILTEROPTIONS,SfxStringItem VersionComment SID_DOCINFO_COMMENTS,SfxStringItem VersionAuthor SID_DOCINFO_AUTHOR,SfxBoolItem Overwrite SID_OVERWRITE,SfxBoolItem Unpacked SID_UNPACK,SfxBoolItem SaveTo SID_SAVETO,SfxBoolItem NoFileSync SID_NO_FILE_SYNC)
 [
     AutoUpdate = FALSE,
     FastCall = FALSE,
diff --git a/sfx2/source/appl/appuno.cxx b/sfx2/source/appl/appuno.cxx
index a5bc1ea0b959..a0bf23d483f6 100644
--- a/sfx2/source/appl/appuno.cxx
+++ b/sfx2/source/appl/appuno.cxx
@@ -105,6 +105,7 @@ SfxFormalArgument const aFormalArgs[] = {
     { reinterpret_cast<SfxType*>(&aSfxBoolItem_Impl), "Unpacked", SID_UNPACK },
     { reinterpret_cast<SfxType*>(&aSfxInt16Item_Impl), "Version", SID_VERSION },
     { reinterpret_cast<SfxType*>(&aSfxBoolItem_Impl), "SaveACopy", SID_SAVEACOPYITEM },
+    { reinterpret_cast<SfxType*>(&aSfxBoolItem_Impl), "NoFileSync", SID_NO_FILE_SYNC },
 };
 
 static sal_uInt16 nMediaArgsCount = SAL_N_ELEMENTS(aFormalArgs);
diff --git a/sfx2/source/doc/docfile.cxx b/sfx2/source/doc/docfile.cxx
index 273d201e94d0..c6e4a55e2091 100644
--- a/sfx2/source/doc/docfile.cxx
+++ b/sfx2/source/doc/docfile.cxx
@@ -194,6 +194,7 @@ public:
     bool m_bRemote:1;
     bool m_bInputStreamIsReadOnly:1;
     bool m_bInCheckIn:1;
+    bool m_bDisableFileSync = false;
 
     OUString m_aName;
     OUString m_aLogicName;
@@ -2024,13 +2025,16 @@ void SfxMedium::Transfer_Impl()
         {
             TransactedTransferForFS_Impl( aSource, aDest, xComEnv );
 
-            // Hideous - no clean way to do this, so we re-open the file just to fsync it
-            osl::File aFile( aDestURL );
-            if ( aFile.open( osl_File_OpenFlag_Write ) == osl::FileBase::E_None )
+            if (!pImpl->m_bDisableFileSync)
             {
-                aFile.sync();
-                SAL_INFO( "sfx.doc", "fsync'd saved file '" << aDestURL << "'" );
-                aFile.close();
+                // Hideous - no clean way to do this, so we re-open the file just to fsync it
+                osl::File aFile( aDestURL );
+                if ( aFile.open( osl_File_OpenFlag_Write ) == osl::FileBase::E_None )
+                {
+                    aFile.sync();
+                    SAL_INFO( "sfx.doc", "fsync'd saved file '" << aDestURL << "'" );
+                    aFile.close();
+                }
             }
         }
         else
@@ -2786,6 +2790,11 @@ void SfxMedium::DisableUnlockWebDAV( bool bDisableUnlockWebDAV )
     pImpl->m_bDisableUnlockWebDAV = bDisableUnlockWebDAV;
 }
 
+void SfxMedium::DisableFileSync(bool bDisableFileSync)
+{
+    pImpl->m_bDisableFileSync = bDisableFileSync;
+}
+
 void SfxMedium::UnlockFile( bool bReleaseLockStream )
 {
 #if !HAVE_FEATURE_MULTIUSER_ENVIRONMENT
diff --git a/sfx2/source/doc/objstor.cxx b/sfx2/source/doc/objstor.cxx
index de065085c217..9b48caac795c 100644
--- a/sfx2/source/doc/objstor.cxx
+++ b/sfx2/source/doc/objstor.cxx
@@ -2751,6 +2751,10 @@ bool SfxObjectShell::PreDoSaveAs_Impl(const OUString& rFileName, const OUString&
     // create a medium for the target URL
     SfxMedium *pNewFile = new SfxMedium( rFileName, StreamMode::READWRITE | StreamMode::SHARE_DENYWRITE | StreamMode::TRUNC, nullptr, pMergedParams );
 
+    const SfxBoolItem* pNoFileSync = pMergedParams->GetItem<SfxBoolItem>(SID_NO_FILE_SYNC, false);
+    if (pNoFileSync && pNoFileSync->GetValue())
+        pNewFile->DisableFileSync(true);
+
     // set filter; if no filter is given, take the default filter of the factory
     if ( !aFilterName.isEmpty() )
         pNewFile->SetFilter( GetFactory().GetFilterContainer()->GetFilter4FilterName( aFilterName ) );