1 files changed, 95 insertions, 0 deletions
diff --git a/searchlib/src/tests/util/bufferwriter/bm.cpp b/searchlib/src/tests/util/bufferwriter/bm.cpp
new file mode 100644
index 00000000000..228ce4adcdc
--- /dev/null
+++ b/searchlib/src/tests/util/bufferwriter/bm.cpp
@@ -0,0 +1,95 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+#include <vespa/fastos/fastos.h>
+#include <vespa/log/log.h>
+LOG_SETUP("bufferwriter_bm");
+#include <vespa/vespalib/testkit/testapp.h>
+#include <iostream>
+#include "work.h"
+#include <vespa/searchlib/util/drainingbufferwriter.h>
+
+using search::DrainingBufferWriter;
+
+double getTime() { return fastos::TimeStamp(fastos::ClockSystem::now()).sec(); }
+
+constexpr size_t million = 1000000;
+
+enum class WorkFuncDispatch
+{
+    DIRECT,
+    LAMBDA,
+    FUNCTOR,
+    FUNCTOR2
+};
+
+
+template <typename T>
+void
+callWork(size_t size, WorkFuncDispatch dispatch)
+{
+    std::vector<T> foo;
+    DrainingBufferWriter writer;
+    foo.resize(size);
+    std::cout << "will write " << size << " elements of size " << sizeof(T) <<
+        std::endl;
+    double before = getTime();
+    switch (dispatch) {
+    case WorkFuncDispatch::DIRECT:
+        work(foo, writer);
+        break;
+    case WorkFuncDispatch::LAMBDA:
+        workLambda(foo, writer);
+        break;
+    case WorkFuncDispatch::FUNCTOR:
+        workFunctor(foo, writer);
+        break;
+    case WorkFuncDispatch::FUNCTOR2:
+        workFunctor2(foo, writer);
+        break;
+    default:
+        abort();
+    }
+    double after = getTime();
+    double delta = (after - before);
+    double writeSpeed = writer.getBytesWritten() / delta;
+    EXPECT_GREATER(writeSpeed, 1000);
+    std::cout << "written is " << writer.getBytesWritten() << std::endl;
+    std::cout << "time used is " << (delta * 1000.0) << " ms" << std::endl;
+    std::cout << "write speed is " << writeSpeed << std::endl;
+}
+
+
+void
+callWorks(WorkFuncDispatch dispatch)
+{
+    callWork<char>(million * 1000, dispatch);
+    callWork<short>(million * 500, dispatch);
+    callWork<int>(million * 250, dispatch);
+    callWork<long>(million * 125, dispatch);
+}
+
+TEST("simple bufferwriter speed test")
+{
+    callWorks(WorkFuncDispatch::DIRECT);
+}
+
+TEST("lambda func bufferwriter speed test")
+{
+    callWorks(WorkFuncDispatch::LAMBDA);
+}
+
+TEST("functor bufferwriter speed test")
+{
+    callWorks(WorkFuncDispatch::FUNCTOR);
+}
+
+TEST("functor2 bufferwriter speed test")
+{
+    callWorks(WorkFuncDispatch::FUNCTOR2);
+}
+
+
+TEST_MAIN()
+{
+    TEST_RUN_ALL();
+}