From 039432362d9c0897f4fbe4334c1d9c99aaf98be8 Mon Sep 17 00:00:00 2001
From: Roberto Raggi <roberto.raggi@nokia.com>
Date: Thu, 21 Jul 2011 14:47:26 +0200
Subject: Speedup the V4 code generation.

Skip discarded code and use QVarLengthArray instead of
QByteArray to store the bytecode.

Change-Id: I4c574e7a817595bc8942ed9a927e79339a2d7b40
Reviewed-on: http://codereview.qt.nokia.com/3760
Reviewed-by: Roberto Raggi <roberto.raggi@nokia.com>
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
---
 src/declarative/qml/v4/qdeclarativev4instruction_p.h | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

(limited to 'src/declarative/qml/v4/qdeclarativev4instruction_p.h')

diff --git a/src/declarative/qml/v4/qdeclarativev4instruction_p.h b/src/declarative/qml/v4/qdeclarativev4instruction_p.h
index e3ac9027f7..6efe9332d1 100644
--- a/src/declarative/qml/v4/qdeclarativev4instruction_p.h
+++ b/src/declarative/qml/v4/qdeclarativev4instruction_p.h
@@ -56,6 +56,7 @@
 #include <QtCore/qglobal.h>
 #include <QtCore/qbytearray.h>
 #include <QtCore/qvector.h>
+#include <QtCore/qvarlengtharray.h>
 
 QT_BEGIN_HEADER
 
@@ -414,21 +415,27 @@ class Bytecode
 public:
     Bytecode();
 
-    QByteArray code() const { return d; }
     const char *constData() const { return d.constData(); }
     int size() const { return d.size(); }
     int count() const { return d.count(); }
     void clear() { d.clear(); }
     bool isEmpty() const { return d.isEmpty(); }
     void append(const Instr &instr);
-    void append(const QVector<Instr> &instrs);
+
+    template <typename _It>
+    void append(_It it, _It last)
+    {
+        for (; it != last; ++it)
+            append(*it);
+    }
+
     int remove(int index);
 
     const Instr &operator[](int offset) const;
     Instr &operator[](int offset);
 
 private:
-    QByteArray d;
+    QVarLengthArray<char, 4 * 1024> d;
 #ifdef QML_THREADED_INTERPRETER
     void **decodeInstr;
 #endif
-- 
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