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Update changelog

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Victor Zverovich 2018-09-12 17:34:16 -07:00
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ChangeLog.rst
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@ -1,7 +1,20 @@
5.2.0 - TBD 5.2.0 - TBD
----------- -----------
* Optimized format string parsing and argument processing * Optimized format string parsing and argument processing which resulted in up
to 5x speed up on long format strings and significant performance boost on
various benchmarks. For example, version 5.2 is 2.2x faster than 5.1 on
decimal integer formatting with ``format_to`` (macOS, clang-902.0.39.2):
================== ======= =======
Method Time, s Speedup
================== ======= =======
fmt::format 5.1 0.58
fmt::format 5.2 0.35 1.66
fmt::format_to 5.1 0.51
fmt::format_to 5.2 0.23 2.22
sprintf 0.71
================== ======= =======
* Changed the ``fmt`` macro from opt-out to opt-in to prevent name collisions. * Changed the ``fmt`` macro from opt-out to opt-in to prevent name collisions.
To enable it define the ``FMT_STRING_ALIAS`` macro to 1 before including To enable it define the ``FMT_STRING_ALIAS`` macro to 1 before including