[Issue 21121] Optimizer slowdowns

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21121

safety0ff.bugz <safety0ff.bugz at gmail.com> changed:

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--- Comment #1 from safety0ff.bugz <safety0ff.bugz at gmail.com> ---
If people are looking to help with these issues but don't know where to start:
Running a cpu profile and adding it to the report goes a long way towards
making progress on the issue.

E.g.: #17135, #18221, #21111 involve big code bases and generic problem
description and no profiling information.

I plan on implementing a fix for #6401 / #7157 but I've had other priorities.

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