Added interpreter benchmarks

root/CMakeLists.txt

@@ -1,5 +1,6 @@
 #add_subdirectory(math)
 add_subdirectory(io)
+add_subdirectory(interpreter)
 if (ROOT_roofit_FOUND)
   add_subdirectory(roofit)
 endif()

root/interpreter/CMakeLists.txt

@@ -0,0 +1,2 @@
+RB_ADD_GBENCHMARK(InterpreterBenchmarks
+  RunInterpreter.cxx)

root/interpreter/RunInterpreter.cxx

@@ -0,0 +1,27 @@
+#include <iostream>
+#include <cstdlib>
+#include <string>
+
+#include <unistd.h>
+
+#include "benchmark/benchmark.h"
+
+static int runTutorial(const std::string& dir, const std::string& filename) {
+  if (getenv("ROOTSYS") == nullptr) {
+    std::cerr << "Couldn't find ROOTSYS environment variable!\n";
+    exit(1);
+  }
+  std::string rootsys = getenv("ROOTSYS");
+  std::string fullpath = rootsys + "/" + dir + "/" + filename;
+  std::string rootInvocation = "root.exe -l -q -b -n -x \"" + fullpath + "\" -e return ";
+  return std::system(rootInvocation.c_str());
+}
+
+static void TestTutorial(benchmark::State &state, const char *dir, const char *tutorial) {
+   while (state.KeepRunning())
+      runTutorial(dir, tutorial);
+}
+
+BENCHMARK_CAPTURE(TestTutorial, Test_hsimple, "tutorials/", "hsimple.C")->Unit(benchmark::kMicrosecond);
+
+BENCHMARK_MAIN();