[Issue 19617] [REG 2.085a] Much slower GC compared to 2.084

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19617

--- Comment #4 from Rainer Schuetze <r.sagitario at gmx.de> ---
No problem. I also noticed a couple of changes in the druntime benchmarks, some
for the better, some for the worse. Those mostly boiled down to how many
garbage collections are run which changes if memory is used differently.

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