performance_tests: initialize logging at startup

tests/performance_tests/main.cpp

@@ -49,6 +49,9 @@ int main(int argc, char** argv)
   set_process_affinity(1);
   set_thread_high_priority();
 
+  mlog_configure(mlog_get_default_log_path("performance_tests.log"), true);
+  mlog_set_log_level(0);
+
   performance_timer timer;
   timer.start();