[Issue 14816] improve dt_t data type for faster appending (tail list or array)

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=14816

--- Comment #2 from Martin Nowak <c...@dawg.eu> ---
Partly fixed by https://github.com/D-Programming-Language/dmd/pull/5083.

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