[Issue 20391] [REG 2.089] DMD compile times increased by 40%

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20391

--- Comment #1 from GoaLitiuM <goalitium at dissues.mail.kapsi.fi> ---
Just to clarify: this performance regression does not just apply to compiling
DMD, it also affects other projects as well.

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