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Victor Zverovich 2019-03-10 12:07:57 -07:00
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@ -341,14 +341,6 @@ Benchmarks
Speed tests
~~~~~~~~~~~
The following speed tests results were generated by building
``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
<https://github.com/fmtlib/format-benchmark/blob/master/tinyformat_test.cpp>`_.
================= ============= ===========
Library Method Run Time, s
================= ============= ===========
@ -360,13 +352,14 @@ Boost Format 1.54 boost::format 7.98
Folly Format folly::format 2.23
================= ============= ===========
As you can see ``boost::format`` is much slower than the alternative methods; this
is confirmed by `other tests <http://accu.org/index.php/journals/1539>`_.
Tinyformat is quite good coming close to IOStreams. Unfortunately tinyformat
cannot be faster than the IOStreams because it uses them internally.
Performance of fmt is close to that of printf, being `faster than printf on integer
formatting <http://zverovich.net/2013/09/07/integer-to-string-conversion-in-cplusplus.html>`_,
but slower on floating-point formatting which dominates this benchmark.
{fmt} is the fastest of the benchmarked methods, ~17% faster than `printf`.
The above results were generated by building ``tinyformat_test.cpp`` on macOS
10.14.3 with ``clang++ -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
<https://github.com/fmtlib/format-benchmark/blob/master/tinyformat_test.cpp>`_.
Compile time and code bloat
~~~~~~~~~~~~~~~~~~~~~~~~~~~