Add internal benchmark (#99)

Author: awegrzyn

CMakeLists.txt

@@ -144,7 +144,7 @@ set(EXAMPLES
   examples/4-RateDerivedMetric.cxx
   examples/5-Benchmark.cxx
   examples/6-Increment.cxx
-  examples/7-Latency.cxx
+  examples/7-InternalBenchamrk.cxx
   examples/8-Multiple.cxx
   examples/9-AutoUpdate.cxx
   examples/10-Buffering.cxx

examples/7-InternalBenchamrk.cxx

@@ -0,0 +1,55 @@
+///
+/// \file 7-InternalBenchmark.cxx
+/// \author Adam Wegrzynek <[email protected]>
+///
+
+#include "Monitoring/MonitoringFactory.h"
+#include <iomanip>
+
+using namespace o2::monitoring;
+using namespace std::chrono;
+
+void test(std::unique_ptr<Monitoring>& monitoring) {
+  for (int i = 0; i < 100000; i++) {
+    monitoring->send({10, "myMetricInt"});
+    monitoring->send({10.10, "myMetricFloat"});
+  }
+}
+
+void testWithTags(std::unique_ptr<Monitoring>& monitoring) {
+  monitoring->addGlobalTag("benchmark", "yes");
+  for (int i = 0; i < 100000; i++) {
+    monitoring->send(Metric{10, "myMetricInt"}.addTags({{"tag1", "val1"}}));
+    monitoring->send(Metric{10.10, "myMetricFloat"}.addTags({{"tag2", "val2"}}));
+  }
+}
+
+int main(int argc, char** argv) {
+  static constexpr std::array<std::string_view,4> backends = {
+    "no-op://",
+    "flume://localhost:1234",
+    "influxdb-udp://localhost:1234",
+    "stdout://"
+  };
+  std::cout << "| " << std::setw(30) << "Backend" << " |"
+            << std::setw(10) << "no tags" << "   |"
+            << std::setw(10) << " (2+1) tags" << "  |" << std::endl;
+  std::cout << "+--------------------------------+-------------+-------------+" << std::endl;
+  for(auto& backend : backends) {
+    std::cout.setstate(std::ios_base::failbit);
+    auto monitoring = MonitoringFactory::Get(std::string(backend));
+    
+    high_resolution_clock::time_point t1 = high_resolution_clock::now();
+    test(monitoring);
+    high_resolution_clock::time_point t2 = high_resolution_clock::now();
+
+    high_resolution_clock::time_point t3 = high_resolution_clock::now();
+    testWithTags(monitoring);
+    high_resolution_clock::time_point t4 = high_resolution_clock::now();
+
+    std::cout.clear(); 
+    std::cout << "| " << std::setw(30) << backend << " |";
+    std::cout << std::setw(10) << duration_cast<milliseconds>(t2 - t1).count() << "us |";
+    std::cout << std::setw(10) << duration_cast<milliseconds>(t4 - t3).count() << "us |" << std::endl;
+  }
+}