[Issue 18629] std.algorithm.iteration.subsitute is slow

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18629

Basile B. <b2.temp at gmx.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Hardware|x86_64                      |All
                 OS|Linux                       |All
           Severity|enhancement                 |normal

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