diff -r 4eab99ff2666 -r 0ab493e5250e tests/benchmark_tools.h
--- a/tests/benchmark_tools.h	Sun Dec 11 16:08:52 2011 +0100
+++ b/tests/benchmark_tools.h	Sun Dec 11 18:43:33 2011 +0100
@@ -28,13 +28,14 @@
 extern std::string instance_name;
 
 extern const std::string DATADIR_PATH;
-
+extern const std::string BENCHMARK_BUILD_ID;
 
 inline void logTime(const std::string &_instance_name,
 		    const std::string &subtest_name,
 		    const lemon::TimeStamp &time)
 {
-  std::cout << "*** " << test_name
+  std::cout << "*** " << BENCHMARK_BUILD_ID 
+	    << ' ' << test_name
 	    << ' ' << _instance_name
 	    << ' ' << subtest_name
 	    << ' ' << std::setiosflags(std::ios::fixed) << std::setprecision(4)