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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 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 Library Method Run Time, s
================= ============= =========== ================= ============= ===========
@ -360,13 +352,14 @@ Boost Format 1.54 boost::format 7.98
Folly Format folly::format 2.23 Folly Format folly::format 2.23
================= ============= =========== ================= ============= ===========
As you can see ``boost::format`` is much slower than the alternative methods; this {fmt} is the fastest of the benchmarked methods, ~17% faster than `printf`.
is confirmed by `other tests <http://accu.org/index.php/journals/1539>`_.
Tinyformat is quite good coming close to IOStreams. Unfortunately tinyformat The above results were generated by building ``tinyformat_test.cpp`` on macOS
cannot be faster than the IOStreams because it uses them internally. 10.14.3 with ``clang++ -O3 -DSPEED_TEST -DHAVE_FORMAT``, and taking the best of
Performance of fmt is close to that of printf, being `faster than printf on integer three runs. In the test, the format string ``"%0.10f:%04d:%+g:%s:%p:%c:%%\n"``
formatting <http://zverovich.net/2013/09/07/integer-to-string-conversion-in-cplusplus.html>`_, or equivalent is filled 2000000 times with output sent to ``/dev/null``; for
but slower on floating-point formatting which dominates this benchmark. further details see the `source
<https://github.com/fmtlib/format-benchmark/blob/master/tinyformat_test.cpp>`_.
Compile time and code bloat Compile time and code bloat
~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~