diff --git a/src/common/textcodec.cpp b/src/common/textcodec.cpp
index dc0865a1..28db0683 100644
--- a/src/common/textcodec.cpp
+++ b/src/common/textcodec.cpp
@@ -1,56 +1,48 @@
 #include <QTextCodec>
 #include "textcodec.h"
 
-TextCodec::TextCodec()
+/* When Qt is compiled with ICU support, QTextCodec::codecForName() is very
+   slow due to broken codec name caching (the function does dozens of
+   comparisons and only then asks the cache...), so we use our own map. */
+static QMap<int, QTextCodec *> initCodecs()
 {
-	_codec = QTextCodec::codecForName("Windows-1252");
+	QMap<int, QTextCodec *> map;
+
+	map.insert(65001, 0);
+	map.insert(874, QTextCodec::codecForName("Windows-874"));
+	map.insert(932, QTextCodec::codecForName("Shift-JIS"));
+	map.insert(936, QTextCodec::codecForName("GB18030"));
+	map.insert(949, QTextCodec::codecForName("EUC-KR"));
+	map.insert(950, QTextCodec::codecForName("Big5"));
+	map.insert(1250, QTextCodec::codecForName("Windows-1250"));
+	map.insert(1251, QTextCodec::codecForName("Windows-1251"));
+	map.insert(1252, QTextCodec::codecForName("Windows-1252"));
+	map.insert(1253, QTextCodec::codecForName("Windows-1253"));
+	map.insert(1254, QTextCodec::codecForName("Windows-1254"));
+	map.insert(1255, QTextCodec::codecForName("Windows-1255"));
+	map.insert(1256, QTextCodec::codecForName("Windows-1256"));
+	map.insert(1257, QTextCodec::codecForName("Windows-1257"));
+	map.insert(1258, QTextCodec::codecForName("Windows-1258"));
+
+	return map;
+}
+
+const QMap<int, QTextCodec *> &TextCodec::codecs()
+{
+	static QMap<int, QTextCodec *> map = initCodecs();
+	return map;
 }
 
 TextCodec::TextCodec(int codepage)
 {
-	switch (codepage) {
-		case 65001:
-			_codec = 0;
-			break;
-		case 932:
-			_codec = QTextCodec::codecForName("Shift-JIS");
-			break;
-		case 936:
-			_codec = QTextCodec::codecForName("GB18030");
-			break;
-		case 949:
-			_codec = QTextCodec::codecForName("EUC-KR");
-			break;
-		case 950:
-			_codec = QTextCodec::codecForName("Big5");
-			break;
-		case 1250:
-			_codec = QTextCodec::codecForName("Windows-1250");
-			break;
-		case 1251:
-			_codec = QTextCodec::codecForName("Windows-1251");
-			break;
-		case 1253:
-			_codec = QTextCodec::codecForName("Windows-1253");
-			break;
-		case 1254:
-			_codec = QTextCodec::codecForName("Windows-1254");
-			break;
-		case 1255:
-			_codec = QTextCodec::codecForName("Windows-1255");
-			break;
-		case 1256:
-			_codec = QTextCodec::codecForName("Windows-1256");
-			break;
-		case 1257:
-			_codec = QTextCodec::codecForName("Windows-1257");
-			break;
-		case 1258:
-			_codec = QTextCodec::codecForName("Windows-1258");
-			break;
-		default:
-			_codec = QTextCodec::codecForName("Windows-1252");
-	}
+	const QMap<int, QTextCodec *> &map = codecs();
+
+	QMap<int, QTextCodec *>::const_iterator it(map.find(codepage));
+	if (it == map.cend()) {
+		qWarning("%d: Unsupported codepage, using UTF-8", codepage);
+		_codec = 0;
+	} else
+		_codec = *it;
 }
 
 QString TextCodec::toString(const QByteArray &ba) const
diff --git a/src/common/textcodec.h b/src/common/textcodec.h
index c014d9c1..a5279ce7 100644
--- a/src/common/textcodec.h
+++ b/src/common/textcodec.h
@@ -2,19 +2,22 @@
 #define TEXTCODEC_H
 
 #include <QString>
+#include <QMap>
 
 class QTextCodec;
 
 class TextCodec
 {
 public:
-	TextCodec();
+	TextCodec() : _codec(0) {}
 	TextCodec(int codepage);
 
 	QString toString(const QByteArray &ba) const;
 
 private:
 	QTextCodec *_codec;
+
+	static const QMap<int, QTextCodec *> &codecs();
 };
 
 #endif // TEXTCODEC_H
diff --git a/src/data/gpiparser.cpp b/src/data/gpiparser.cpp
index 47c2ea91..6755abae 100644
--- a/src/data/gpiparser.cpp
+++ b/src/data/gpiparser.cpp
@@ -128,7 +128,7 @@ qint64 CryptDevice::readData(char *data, qint64 maxSize)
 class DataStream : public QDataStream
 {
 public:
-	DataStream(QIODevice *d) : QDataStream(d) {}
+	DataStream(QIODevice *d) : QDataStream(d), _codec(1252) {}
 
 	void setCodepage(quint16 codepage) {_codec = TextCodec(codepage);}
 
diff --git a/src/data/twonavparser.cpp b/src/data/twonavparser.cpp
index 76c91c0d..57206176 100644
--- a/src/data/twonavparser.cpp
+++ b/src/data/twonavparser.cpp
@@ -75,7 +75,7 @@ bool TwoNavParser::parse(QFile *file, QList<TrackData> &tracks,
   QVector<Waypoint> &waypoints)
 {
 	Q_UNUSED(polygons);
-	TextCodec codec;
+	TextCodec codec(1252);
 	GCS gcs;
 	bool ok, route = false, track = false, waypoint = false;
 
diff --git a/src/map/IMG/lblfile.h b/src/map/IMG/lblfile.h
index e3a01201..3a361b97 100644
--- a/src/map/IMG/lblfile.h
+++ b/src/map/IMG/lblfile.h
@@ -16,14 +16,14 @@ class LBLFile : public SubFile
 {
 public:
 	LBLFile(const IMGData *img)
-	  : SubFile(img), _huffmanText(0), _table(0), _rasters(0), _imgIdSize(0),
-	  _poiShift(0), _shift(0), _encoding(0) {}
+	  : SubFile(img), _huffmanText(0), _table(0), _rasters(0), _codec(1252),
+	  _imgIdSize(0), _poiShift(0), _shift(0), _encoding(0) {}
 	LBLFile(const QString *path)
-	  : SubFile(path), _huffmanText(0), _table(0), _rasters(0), _imgIdSize(0),
-	  _poiShift(0), _shift(0), _encoding(0) {}
+	  : SubFile(path), _huffmanText(0), _table(0), _rasters(0), _codec(1252),
+	  _imgIdSize(0), _poiShift(0), _shift(0), _encoding(0) {}
 	LBLFile(const SubFile *gmp, quint32 offset)
 	  : SubFile(gmp, offset), _huffmanText(0), _table(0), _rasters(0),
-	  _imgIdSize(0), _poiShift(0), _shift(0), _encoding(0) {}
+	  _codec(1252), _imgIdSize(0), _poiShift(0), _shift(0), _encoding(0) {}
 	~LBLFile();
 
 	bool load(Handle &hdl, const RGNFile *rgn, Handle &rgnHdl);