diff --git a/src/plugins/qmljstools/qmljsfunctionfilter.cpp b/src/plugins/qmljstools/qmljsfunctionfilter.cpp
index e39ba3de132..d24b02156ba 100644
--- a/src/plugins/qmljstools/qmljsfunctionfilter.cpp
+++ b/src/plugins/qmljstools/qmljsfunctionfilter.cpp
@@ -5,12 +5,16 @@
 #include "qmljslocatordata.h"
 #include "qmljstoolstr.h"
 
+#include <extensionsystem/pluginmanager.h>
+
 #include <utils/algorithm.h>
+#include <utils/asynctask.h>
 
 #include <QRegularExpression>
 
 using namespace Core;
 using namespace QmlJSTools::Internal;
+using namespace Utils;
 
 Q_DECLARE_METATYPE(LocatorData::Entry)
 
@@ -25,7 +29,66 @@ FunctionFilter::FunctionFilter(LocatorData *data, QObject *parent)
     setDefaultIncludedByDefault(false);
 }
 
-FunctionFilter::~FunctionFilter() = default;
+static void matches(QPromise<void> &promise, const LocatorStorage &storage,
+                    const QHash<FilePath, QList<LocatorData::Entry>> &locatorEntries)
+{
+    const QString input = storage.input();
+    const Qt::CaseSensitivity caseSensitivityForPrefix = ILocatorFilter::caseSensitivity(input);
+    const QRegularExpression regexp = ILocatorFilter::createRegExp(input);
+    if (!regexp.isValid())
+        return;
+
+    LocatorFilterEntries entries[int(ILocatorFilter::MatchLevel::Count)];
+    for (const QList<LocatorData::Entry> &items : locatorEntries) {
+        for (const LocatorData::Entry &info : items) {
+            if (promise.isCanceled())
+                return;
+
+            if (info.type != LocatorData::Function)
+                continue;
+
+            const QRegularExpressionMatch match = regexp.match(info.symbolName);
+            if (match.hasMatch()) {
+                LocatorFilterEntry filterEntry;
+                filterEntry.displayName = info.displayName;
+                filterEntry.linkForEditor = {info.fileName, info.line, info.column};
+                filterEntry.extraInfo = info.extraInfo;
+                filterEntry.highlightInfo = ILocatorFilter::highlightInfo(match);
+
+                if (filterEntry.displayName.startsWith(input, caseSensitivityForPrefix))
+                    entries[int(ILocatorFilter::MatchLevel::Best)].append(filterEntry);
+                else if (filterEntry.displayName.contains(input, caseSensitivityForPrefix))
+                    entries[int(ILocatorFilter::MatchLevel::Better)].append(filterEntry);
+                else
+                    entries[int(ILocatorFilter::MatchLevel::Good)].append(filterEntry);
+            }
+        }
+    }
+
+    for (auto &entry : entries) {
+        if (promise.isCanceled())
+            return;
+
+        if (entry.size() < 1000)
+            Utils::sort(entry, LocatorFilterEntry::compareLexigraphically);
+    }
+    storage.reportOutput(std::accumulate(std::begin(entries), std::end(entries),
+                                         LocatorFilterEntries()));
+}
+
+LocatorMatcherTasks FunctionFilter::matchers()
+{
+    using namespace Tasking;
+
+    TreeStorage<LocatorStorage> storage;
+
+    const auto onSetup = [storage, entries = m_data->entries()](AsyncTask<void> &async) {
+        async.setFutureSynchronizer(ExtensionSystem::PluginManager::futureSynchronizer());
+        async.setConcurrentCallData(matches, *storage, entries);
+    };
+
+    return {{Async<void>(onSetup), storage}};
+}
 
 QList<LocatorFilterEntry> FunctionFilter::matchesFor(QFutureInterface<LocatorFilterEntry> &future,
                                                      const QString &entry)
diff --git a/src/plugins/qmljstools/qmljsfunctionfilter.h b/src/plugins/qmljstools/qmljsfunctionfilter.h
index 4334d5d9fca..71b3d0b5dd6 100644
--- a/src/plugins/qmljstools/qmljsfunctionfilter.h
+++ b/src/plugins/qmljstools/qmljsfunctionfilter.h
@@ -16,11 +16,12 @@ class FunctionFilter : public Core::ILocatorFilter
 
 public:
     explicit FunctionFilter(LocatorData *data, QObject *parent = nullptr);
-    ~FunctionFilter() override;
 
     QList<Core::LocatorFilterEntry> matchesFor(QFutureInterface<Core::LocatorFilterEntry> &future,
                                                const QString &entry) override;
 private:
+    Core::LocatorMatcherTasks matchers() final;
+
     LocatorData *m_data = nullptr;
 };