diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -29,6 +29,7 @@
 target_link_libraries(
     dolphinvcs PUBLIC
     Qt5::Widgets
+    Qt5::Concurrent
 )
 
 set_target_properties(dolphinvcs PROPERTIES
diff --git a/src/views/draganddrophelper.cpp b/src/views/draganddrophelper.cpp
--- a/src/views/draganddrophelper.cpp
+++ b/src/views/draganddrophelper.cpp
@@ -25,16 +25,40 @@
 #include <QDBusConnection>
 #include <QDropEvent>
 #include <QMimeData>
+#include <QtConcurrent/QtConcurrent>
 
 #include <KIO/DropJob>
 #include <KJobWidgets>
 
-
 bool DragAndDropHelper::urlListMatchesUrl(const QList<QUrl>& urls, const QUrl& destUrl)
 {
-    return std::find_if(urls.constBegin(), urls.constEnd(), [destUrl](const QUrl& url) {
-        return url.matches(destUrl, QUrl::StripTrailingSlash);
-    }) != urls.constEnd();
+    // This method is quite expensive and is called several times when the mouse is
+    // moved from the drag origin to the drop destination. Use a cache.
+    static bool lastResult = false;
+    static const QList<QUrl>* lastUrls = nullptr;
+    static const QUrl* lastDestUrl = nullptr;
+
+    // If checking the same data as last time, return the same result.
+    if (&urls == lastUrls && &destUrl == lastDestUrl) {
+        return lastResult;
+    }
+    // otherwise do the expensive check and store the results
+    const QUrl& adjustedDestUrl = destUrl.adjusted(QUrl::StripTrailingSlash);
+
+    // Use all the cpu availables.
+    std::function<bool (const QUrl&)> stripMap = [&](const QUrl &url) -> bool {
+        return adjustedDestUrl == url.adjusted(QUrl::StripTrailingSlash);
+    };
+    auto andReduce = [&](bool &result, const bool partial) {
+        result &= partial;
+    };
+
+    lastResult = QtConcurrent::blockingMappedReduced<bool>
+                (urls.constBegin(), urls.constEnd(), stripMap, andReduce);
+    lastUrls = &urls;
+    lastDestUrl = &destUrl;
+
+    return lastResult;
 }
 
 KIO::DropJob* DragAndDropHelper::dropUrls(const QUrl& destUrl, QDropEvent* event, QWidget* window)