We noticed a significant performance degradation in DYLD SPI (part of Darwin Project). This causes slow launch time and application lags on every dynamic linked library load.
This issue started from Big Sur 11.3. The problem is also present on iOS 14.6.
I created a thread on swift.org. If you have some additional information or measurements, please, add it to the thread.
Also I created a ticket at Feedback Assistant (case ID FB9349767).
Alexander_K
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