Update README.rst

README.rst

@@ -259,8 +259,8 @@ Speed tests
 ~~~~~~~~~~~
 
 The following speed tests results were generated by building
-``tinyformat_test.cpp`` on Ubuntu GNU/Linux 12.10 with
-``g++-4.7.2 -O3 -DSPEED_TEST -DHAVE_FORMAT``, and taking the best of three
+``tinyformat_test.cpp`` on Ubuntu GNU/Linux 14.04.1 with
+``g++-4.8.2 -O3 -DSPEED_TEST -DHAVE_FORMAT``, and taking the best of three
 runs.  In the test, the format string ``"%0.10f:%04d:%+g:%s:%p:%c:%%\n"`` or
 equivalent is filled 2000000 times with output sent to ``/dev/null``; for
 further details see the `source