Use the QMap iterator instead of foreach(key, map.keys()) in UpdateItemStatesThread::run()

and in VersionControlObserver::slotThreadFinished().

So we get O(n) complexity instead of O(n*logn), and O(1) memory instead of O(n).
Thanks to Thiago Macieira for providing this information.

FIXED-IN: 4.13
REVIEW: 115018

2 files changed, 7 insertions, 5 deletions

diff --git a/src/views/versioncontrol/updateitemstatesthread.cpp b/src/views/versioncontrol/updateitemstatesthread.cpp
index 6be07d361..db50aa2e8 100644
--- a/src/views/versioncontrol/updateitemstatesthread.cpp
+++ b/src/views/versioncontrol/updateitemstatesthread.cpp
@@ -50,9 +50,10 @@ void UpdateItemStatesThread::run()
     m_retrievedItems = false;
 
     QMutexLocker pluginLocker(m_globalPluginMutex);
-    foreach (const QString& directory, m_itemStates.keys()) {
-        if (m_plugin->beginRetrieval(directory)) {
-            QVector<VersionControlObserver::ItemState>& items = m_itemStates[directory];
+    QMap<QString, QVector<VersionControlObserver::ItemState> >::iterator it = m_itemStates.begin();
+    for (; it != m_itemStates.end(); ++it) {
+        if (m_plugin->beginRetrieval(it.key())) {
+            QVector<VersionControlObserver::ItemState>& items = it.value();
             const int count = items.count();
 
             KVersionControlPlugin2* pluginV2 = qobject_cast<KVersionControlPlugin2*>(m_plugin);
diff --git a/src/views/versioncontrol/versioncontrolobserver.cpp b/src/views/versioncontrol/versioncontrolobserver.cpp
index 4d939ee0d..c542542ee 100644
--- a/src/views/versioncontrol/versioncontrolobserver.cpp
+++ b/src/views/versioncontrol/versioncontrolobserver.cpp
@@ -205,8 +205,9 @@ void VersionControlObserver::slotThreadFinished()
     }
 
     const QMap<QString, QVector<ItemState> >& itemStates = thread->itemStates();
-    foreach (const QString& directory, itemStates.keys()) {
-        const QVector<ItemState>& items = itemStates.value(directory);
+    QMap<QString, QVector<ItemState> >::const_iterator it = itemStates.constBegin();
+    for (; it != itemStates.constEnd(); ++it) {
+        const QVector<ItemState>& items = it.value();
 
         foreach (const ItemState& item, items) {
             QHash<QByteArray, QVariant> values;