diff --git a/benchmarks/bench4/bench4.cpp b/benchmarks/bench4/bench4.cpp
new file mode 100644
index 0000000..6d460eb
--- /dev/null
+++ b/benchmarks/bench4/bench4.cpp
@@ -0,0 +1,135 @@
+//
+//  Copyright (c) 2000-2002
+//  Joerg Walter, Mathias Koch
+//
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+//  The authors gratefully acknowledge the support of
+//  GeNeSys mbH & Co. KG in producing this work.
+//
+
+#include <boost/numeric/interval.hpp>
+#include <boost/numeric/interval/io.hpp>
+#include "../bench1/bench1.hpp"
+
+void header (std::string text) {
+    std::cout << text << std::endl;
+}
+
+template<class T>
+struct peak_c_plus {
+    typedef T value_type;
+
+    void operator () (int runs) const {
+        try {
+            static T s (0);
+            boost::timer t;
+            for (int i = 0; i < runs; ++ i) {
+                s += T (0);
+//                sink_scalar (s);
+            }
+            footer<value_type> () (0, 1, runs, t.elapsed ());
+        }
+        catch (std::exception &e) {
+            std::cout << e.what () << std::endl;
+        }
+    }
+};
+template<class T>
+struct peak_c_multiplies {
+    typedef T value_type;
+
+    void operator () (int runs) const {
+        try {
+            static T s (1);
+            boost::timer t;
+            for (int i = 0; i < runs; ++ i) {
+                s *= T (1);
+//                sink_scalar (s);
+            }
+            footer<value_type> () (0, 1, runs, t.elapsed ());
+        }
+        catch (std::exception &e) {
+            std::cout << e.what () << std::endl;
+        }
+    }
+};
+
+template<class T>
+void peak<T>::operator () (int runs) {
+    header ("peak");
+
+    header ("plus");
+    peak_c_plus<T> () (runs);
+
+    header ("multiplies");
+    peak_c_multiplies<T> () (runs);
+}
+
+template struct peak<boost::numeric::interval<float> >;
+template struct peak<boost::numeric::interval<double> >;
+
+#ifdef USE_BOOST_COMPLEX
+
+template struct peak<boost::complex<boost::numeric::interval<float> > >;
+template struct peak<boost::complex<boost::numeric::interval<double> > >;
+
+#endif
+
+
+
+template <typename scalar> 
+void do_bench (std::string type_string, int scale)
+{
+    header (type_string);
+    peak<scalar> () (1000000 * scale);
+
+    header (type_string + ", 3");
+    bench_1<scalar, 3> () (1000000 * scale);
+    bench_2<scalar, 3> () (300000 * scale);
+    bench_3<scalar, 3> () (100000 * scale);
+
+    header (type_string + ", 10");
+    bench_1<scalar, 10> () (300000 * scale);
+    bench_2<scalar, 10> () (30000 * scale);
+    bench_3<scalar, 10> () (3000 * scale);
+
+    header (type_string + ", 30");
+    bench_1<scalar, 30> () (100000 * scale);
+    bench_2<scalar, 30> () (3000 * scale);
+    bench_3<scalar, 30> () (100 * scale);
+
+    header (type_string + ", 100");
+    bench_1<scalar, 100> () (30000 * scale);
+    bench_2<scalar, 100> () (300 * scale);
+    bench_3<scalar, 100> () (3 * scale);
+}
+
+int main (int argc, char *argv []) {
+
+    int scale = 1;
+    if (argc > 1)
+        scale = std::atoi (argv [1]);
+
+#ifdef USE_FLOAT
+    do_bench<boost::numeric::interval<float> > ("boost::numeric::interval<FLOAT>", scale);
+#endif
+
+#ifdef USE_DOUBLE
+    do_bench<boost::numeric::interval<double> > ("boost::numeric::interval<DOUBLE>", scale);
+#endif
+
+#ifdef USE_STD_COMPLEX
+#ifdef USE_FLOAT
+    do_bench<std::complex<boost::numeric::interval<float> > > ("boost::numeric::interval<COMPLEX<FLOAT>>", scale);
+#endif
+
+#ifdef USE_DOUBLE
+    do_bench<std::complex<doublboost::numeric::interval<double> > > ("boost::numeric::interval<COMPLEX<DOUBLE>>", scale);
+#endif
+#endif
+
+    return 0;
+}