diff --git a/src/ringbuffer.h b/src/ringbuffer.h
new file mode 100644
--- /dev/null
+++ b/src/ringbuffer.h
@@ -0,0 +1,49 @@
+/*
+  Copyright © 2018 Hasan Yavuz Özderya
+
+  This file is part of serialplot.
+
+  serialplot is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  serialplot is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with serialplot.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef RINGBUFFER_H
+#define RINGBUFFER_H
+
+#include "framebuffer.h"
+
+/// A fast buffer implementation for storing data.
+class RingBuffer : public WFrameBuffer
+{
+public:
+    RingBuffer(unsigned n);
+    ~RingBuffer();
+
+    virtual unsigned size() const;
+    virtual double sample(unsigned i) const;
+    virtual Range limits() const;
+    virtual void resize(unsigned n);
+    virtual void addSamples(double* samples, unsigned n);
+    virtual void clear();
+
+private:
+    unsigned _size;            ///< size of `data`
+    double* data;              ///< storage
+    unsigned headIndex;        ///< indicates the actual `0` index of the ring buffer
+
+    mutable bool limInvalid;   ///< Indicates that limits needs to be re-calculated
+    mutable Range limCache;    ///< Cache for limits()
+    void updateLimits() const; ///< Updates limits cache
+};
+
+#endif