5 files changed, 39 insertions, 1 deletions
diff --git a/src/corelib/io/qfile.cpp b/src/corelib/io/qfile.cpp
index 3af936122e..d991e86839 100644
--- a/src/corelib/io/qfile.cpp
+++ b/src/corelib/io/qfile.cpp
@@ -429,7 +429,7 @@ QFile::exists() const
 bool
 QFile::exists(const QString &fileName)
 {
-    return QFileInfo(fileName).exists();
+    return QFileInfo::exists(fileName);
 }
 
 /*!
diff --git a/src/corelib/io/qfileinfo.cpp b/src/corelib/io/qfileinfo.cpp
index 93444cb47c..1d5f16c9d9 100644
--- a/src/corelib/io/qfileinfo.cpp
+++ b/src/corelib/io/qfileinfo.cpp
@@ -667,6 +667,28 @@ bool QFileInfo::exists() const
 }
 
 /*!
+    Returns true if the \a file exists; otherwise returns false.
+
+    \note If \a file is a symlink that points to a non-existing
+    file, false is returned.
+
+    \note Using this function is faster for than using
+    \c QFileInfo(file).exists() for file system access.
+*/
+bool QFileInfo::exists(const QString &file)
+{
+    QFileSystemEntry entry(file);
+    QFileSystemMetaData data;
+    QAbstractFileEngine *engine =
+        QFileSystemEngine::resolveEntryAndCreateLegacyEngine(entry, data);
+    // Expensive fallback to non-QFileSystemEngine implementation
+    if (engine)
+        return QFileInfo(file).exists();
+    QFileSystemEngine::fillMetaData(entry, data, QFileSystemMetaData::ExistsAttribute);
+    return data.exists();
+}
+
+/*!
     Refreshes the information about the file, i.e. reads in information
     from the file system the next time a cached property is fetched.
 
diff --git a/src/corelib/io/qfileinfo.h b/src/corelib/io/qfileinfo.h
index 211c18d0a0..0f18261943 100644
--- a/src/corelib/io/qfileinfo.h
+++ b/src/corelib/io/qfileinfo.h
@@ -84,6 +84,7 @@ public:
     void setFile(const QFile &file);
     void setFile(const QDir &dir, const QString &file);
     bool exists() const;
+    static bool exists(const QString &file);
     void refresh();
 
     QString filePath() const;
diff --git a/tests/auto/corelib/io/qfileinfo/tst_qfileinfo.cpp b/tests/auto/corelib/io/qfileinfo/tst_qfileinfo.cpp
index af2578ac37..d2171cc64a 100644
--- a/tests/auto/corelib/io/qfileinfo/tst_qfileinfo.cpp
+++ b/tests/auto/corelib/io/qfileinfo/tst_qfileinfo.cpp
@@ -438,6 +438,7 @@ void tst_QFileInfo::exists()
 
     QFileInfo fi(path);
     QCOMPARE(fi.exists(), expected);
+    QCOMPARE(QFileInfo::exists(path), expected);
 }
 
 void tst_QFileInfo::absolutePath_data()
diff --git a/tests/benchmarks/corelib/io/qfileinfo/main.cpp b/tests/benchmarks/corelib/io/qfileinfo/main.cpp
index 2e63795978..594e5b7478 100644
--- a/tests/benchmarks/corelib/io/qfileinfo/main.cpp
+++ b/tests/benchmarks/corelib/io/qfileinfo/main.cpp
@@ -52,6 +52,8 @@ class qfileinfo : public QObject
 {
     Q_OBJECT
 private slots:
+    void existsTemporary();
+    void existsStatic();
 #if defined(Q_OS_WIN) && !defined(Q_OS_WINCE)
     void symLinkTargetPerformanceLNK();
     void symLinkTargetPerformanceMounpoint();
@@ -70,6 +72,18 @@ void qfileinfo::cleanupTestCase()
 {
 }
 
+void qfileinfo::existsTemporary()
+{
+    QString appPath = QCoreApplication::applicationFilePath();
+    QBENCHMARK { QFileInfo(appPath).exists(); }
+}
+
+void qfileinfo::existsStatic()
+{
+    QString appPath = QCoreApplication::applicationFilePath();
+    QBENCHMARK { QFileInfo::exists(appPath); }
+}
+
 #if defined(Q_OS_WIN) && !defined(Q_OS_WINCE)
 void qfileinfo::symLinkTargetPerformanceLNK()
 {