Add benchmark for binary_find

perf/CMakeLists.txt

@@ -12,6 +12,7 @@ include_directories(SYSTEM ${Boost_INCLUDE_DIRS})
 set(BENCHMARKS
   accumulate
   bernoulli_distribution
+  binary_find
   cart_to_polar
   copy_if
   copy_to_device

perf/perf_binary_find.cpp

@@ -0,0 +1,67 @@
+//---------------------------------------------------------------------------//
+// Copyright (c) 2014 Roshan <[email protected]>
+//
+// 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
+//
+// See http://kylelutz.github.com/compute for more information.
+//---------------------------------------------------------------------------//
+
+#include <algorithm>
+#include <iostream>
+#include <numeric>
+#include <vector>
+
+#include <boost/compute/system.hpp>
+#include <boost/compute/lambda.hpp>
+#include <boost/compute/algorithm/detail/binary_find.hpp>
+#include <boost/compute/algorithm/partition.hpp>
+#include <boost/compute/container/vector.hpp>
+
+#include "perf.hpp"
+
+int rand_int()
+{
+    return static_cast<int>((rand() / double(RAND_MAX)) * 25.0);
+}
+
+int main(int argc, char *argv[])
+{
+    perf_parse_args(argc, argv);
+    std::cout << "size: " << PERF_N << std::endl;
+
+    // setup context and queue for the default device
+    boost::compute::device device = boost::compute::system::default_device();
+    boost::compute::context context(device);
+    boost::compute::command_queue queue(context, device);
+    std::cout << "device: " << device.name() << std::endl;
+
+    // create vector of random numbers on the host
+    std::vector<int> host_vector(PERF_N);
+    std::generate(host_vector.begin(), host_vector.end(), rand_int);
+
+    // create vector on the device and copy the data
+    boost::compute::vector<int> device_vector(PERF_N, context);
+    boost::compute::copy(
+        host_vector.begin(), host_vector.end(), device_vector.begin(), queue
+    );
+
+    using boost::compute::_1;
+    boost::compute::partition(
+        device_vector.begin(), device_vector.end(), _1 < 20, queue
+    );
+
+    perf_timer t;
+    for(size_t trial = 0; trial < PERF_TRIALS; trial++){
+        t.start();
+        boost::compute::detail::binary_find(
+            device_vector.begin(), device_vector.end(), _1 >= 20, queue
+        );
+        queue.finish();
+        t.stop();
+    }
+    std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
+
+    return 0;
+}