Fix startup performance on Qt5

Use more appropriate container (QList) for resume data queue buffer.
QVector in Qt5 has poor performance of the first element taking operation,
which is used to process the resume data queue. In Qt6, QVector is just an
alias for QList, so there was no problem there.

PR #18387.
Fixes #18341.

src/base/bittorrent/resumedatastorage.cpp

@@ -33,6 +33,7 @@
 #include <QMetaObject>
 #include <QMutexLocker>
 #include <QThread>
+#include <QVector>
 
 const int TORRENTIDLIST_TYPEID = qRegisterMetaType<QVector<BitTorrent::TorrentID>>();
 
@@ -59,11 +60,11 @@ void BitTorrent::ResumeDataStorage::loadAll() const
     loadingThread->start();
 }
 
-QVector<BitTorrent::LoadedResumeData> BitTorrent::ResumeDataStorage::fetchLoadedResumeData() const
+QList<BitTorrent::LoadedResumeData> BitTorrent::ResumeDataStorage::fetchLoadedResumeData() const
 {
     const QMutexLocker locker {&m_loadedResumeDataMutex};
 
-    const QVector<BitTorrent::LoadedResumeData> loadedResumeData = m_loadedResumeData;
+    const QList<BitTorrent::LoadedResumeData> loadedResumeData = m_loadedResumeData;
     m_loadedResumeData.clear();
 
     return loadedResumeData;

src/base/bittorrent/resumedatastorage.h

@@ -29,9 +29,9 @@
 #pragma once
 
 #include <QtContainerFwd>
+#include <QList>
 #include <QMutex>
 #include <QObject>
-#include <QVector>
 
 #include "base/3rdparty/expected.hpp"
 #include "base/path.h"
@@ -65,7 +65,7 @@ namespace BitTorrent
         virtual void storeQueue(const QVector<TorrentID> &queue) const = 0;
 
         void loadAll() const;
-        QVector<LoadedResumeData> fetchLoadedResumeData() const;
+        QList<LoadedResumeData> fetchLoadedResumeData() const;
 
     signals:
         void loadStarted(const QVector<BitTorrent::TorrentID> &torrents);
@@ -78,7 +78,7 @@ namespace BitTorrent
         virtual void doLoadAll() const = 0;
 
         const Path m_path;
-        mutable QVector<LoadedResumeData> m_loadedResumeData;
+        mutable QList<LoadedResumeData> m_loadedResumeData;
         mutable QMutex m_loadedResumeDataMutex;
     };
 }

src/base/bittorrent/sessionimpl.cpp

@@ -340,7 +340,7 @@ struct BitTorrent::SessionImpl::ResumeSessionContext final : public QObject
 
     ResumeDataStorage *startupStorage = nullptr;
     ResumeDataStorageType currentStorageType = ResumeDataStorageType::Legacy;
-    QVector<LoadedResumeData> loadedResumeData;
+    QList<LoadedResumeData> loadedResumeData;
     int processingResumeDataCount = 0;
     int64_t totalResumeDataCount = 0;
     int64_t finishedResumeDataCount = 0;