MacOS expensive performance degradation

Hi. I have a cross-platform CI setup that runs our code on Linux, Mac, and Windows. Typically, Mac and Linux take ~3-4 minutes to run, while Windows takes ~6 minutes.
Today, the MacOS run took 6 minutes for one run and 11 for a later one. I have made no major changes to the CI setup, and the duration increase is for all steps.


Recently, I had created an issue ticket (actions/virtual-environments#1336) to report the similar problem about the performance of GitHub-hosted macOS runners.

You can follow this issue ticket and add your comments in it.