The compilation on the Ubuntu machines now seems to be much slower with VT-X enabled, than with the "NEM" mode (with the turtle symbol in the status bar). How do I know? Well, I had installed WSL2 recently, and this screwed up my VirtualBox machines (leading to "HMR3Init: Attempting fall back to NEM: VT-x is not available" in the logs, which I noticed only after a while); once I noticed it, I disabled WSL2 via
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bcdedit /set hypervisorlaunchtype off
I'm wondering about this drop in performance, but have no idea where it could come from; didn't see anything I could identify as related in the log file (the one from Ubuntu 20.04 is attached - VBox.log with VT-x enabled, VBox.log.2 from before).
Since only the Ubuntu machines are slow, maybe it is related to what was reported here: viewtopic.php?f=6&t=103364 ? Need to do some more tests I guess, if clang on other machines is affected as well for example...
Any idea on what might be happening here?