optimise find/insert pattern

if we're doing a find/insert on a set or a map, it is better to just do
a conditional insert/emplace operation than triggering two lookups.

Change-Id: I80da5097f5a89fe30fa348ce5b6e747c34287a8d
Reviewed-on: https://gerrit.libreoffice.org/70937
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

4 files changed, 4 insertions, 14 deletions

diff --git a/vcl/unx/generic/fontmanager/fontconfig.cxx b/vcl/unx/generic/fontmanager/fontconfig.cxx
index 2cb1aee919d9..e13eb0a82716 100644
--- a/vcl/unx/generic/fontmanager/fontconfig.cxx
+++ b/vcl/unx/generic/fontmanager/fontconfig.cxx
@@ -1041,9 +1041,8 @@ void PrintFontManager::Substitute(FontSelectPattern &rPattern, OUString& rMissin
                         {
                             LanguageTag aOurTag(getExemplarLangTagForCodePoint(pRemainingCodes[i]));
                             OString sTag = OUStringToOString(aOurTag.getBcp47(), RTL_TEXTENCODING_UTF8);
-                            if (m_aPreviousLangSupportRequests.find(sTag) != m_aPreviousLangSupportRequests.end())
+                            if (!m_aPreviousLangSupportRequests.insert(sTag).second)
                                 continue;
-                            m_aPreviousLangSupportRequests.insert(sTag);
                             sTag = mapToFontConfigLangTag(aOurTag);
                             if (!sTag.isEmpty() && m_aPreviousLangSupportRequests.find(sTag) == m_aPreviousLangSupportRequests.end())
                             {
diff --git a/vcl/unx/generic/printer/cpdmgr.cxx b/vcl/unx/generic/printer/cpdmgr.cxx
index 195708d1953b..fe3b44918d16 100644
--- a/vcl/unx/generic/printer/cpdmgr.cxx
+++ b/vcl/unx/generic/printer/cpdmgr.cxx
@@ -193,14 +193,7 @@ std::vector<std::pair<std::string, gchar*>> const & CPDManager::getTempBackends(
 }
 
 void CPDManager::addNewPrinter(const OUString& aPrinterName, const OUString& aUniqueName, CPDPrinter *pDest) {
-    std::pair<OUString, CPDPrinter *> newPrinter (aUniqueName, pDest);
-    std::unordered_map<OUString, CPDPrinter *>::iterator it = m_aCPDDestMap.find( aUniqueName );
-    if (it == m_aCPDDestMap.end()) {
-        m_aCPDDestMap.insert(newPrinter);
-    } else {
-        m_aCPDDestMap.erase(it);
-        m_aCPDDestMap.insert(newPrinter);
-    }
+    m_aCPDDestMap[aUniqueName] = pDest;
     bool bSetToGlobalDefaults = m_aPrinters.find( aUniqueName ) == m_aPrinters.end();
     Printer aPrinter = m_aPrinters[ aUniqueName ];
     if( bSetToGlobalDefaults )
diff --git a/vcl/unx/generic/printer/printerinfomanager.cxx b/vcl/unx/generic/printer/printerinfomanager.cxx
index 0d61ae9ef67d..28ba5eee2e7b 100644
--- a/vcl/unx/generic/printer/printerinfomanager.cxx
+++ b/vcl/unx/generic/printer/printerinfomanager.cxx
@@ -818,12 +818,11 @@ static void standardSysQueueTokenHandler(
                 // get the queue name between fore and aft tokens
                 OUString aSysQueue( OStringToOUString( line.copy( nPos, nAftPos - nPos ), aEncoding ) );
                 // do not insert duplicates (e.g. lpstat tends to produce such lines)
-                if( aUniqueSet.find( aSysQueue ) == aUniqueSet.end() )
+                if( aUniqueSet.insert( aSysQueue ).second )
                 {
                     o_rQueues.emplace_back( );
                     o_rQueues.back().m_aQueue = aSysQueue;
                     o_rQueues.back().m_aLocation = aSysQueue;
-                    aUniqueSet.insert( aSysQueue );
                 }
             }
         }
diff --git a/vcl/unx/gtk/a11y/atkutil.cxx b/vcl/unx/gtk/a11y/atkutil.cxx
index 92905f6ec64b..e76cf990228a 100644
--- a/vcl/unx/gtk/a11y/atkutil.cxx
+++ b/vcl/unx/gtk/a11y/atkutil.cxx
@@ -576,9 +576,8 @@ static void handle_get_focus(::VclWindowEvent const * pEvent)
     }
     else
     {
-        if( g_aWindowList.list.find(pWindow) == g_aWindowList.list.end() )
+        if( g_aWindowList.list.insert(pWindow).second )
         {
-            g_aWindowList.list.insert(pWindow);
             try
             {
                 rDocumentFocusListener.attachRecursive(xAccessible, xContext, xStateSet);