Any Recommendations on Hypervisor for Building UXP?

[Basilisk-Dev]

So far up to this point I've been using VirtualBox to build Basilisk releases, but it's frustratingly slow. The Windows builds take an hour plus each on a VM with 8 cores and 64 GB RAM. Due to the fact that I build 32-bit builds as well that's over 2 hours spent on Windows builds. The Linux builds take 30+ minutes with a similarly specced virtual machine.

It's not like I'm running slow hardware either. My system is a 32-core/64-thread Epyc CPU with 128 GB RAM and an NVME drive. Building Basilisk on my host system takes less than 10 minutes.

I'm considering just taking a tar archive of my Linux build VM and extracting that on my host system and then chrooting into that. That would remove all virtualization overhead. That being said, that doesn't answer the issues with Windows build performance.

Has anyone done any benchmarking on which virtualization software is fastest when it comes to compiling large projects like UXP based browsers? If so, what were your results?

[Moonchild]

I can't speak for virtualbox but vmware doesn't have much issue with cross-architecture virtualized builds. it's a little slower but definitiely not by a factor four.
I've tried hypervisor setups but have never been able to get it to work (at all)

[Nuck-TH]

~20 min on Ryzen 5600x here, so something is really wrong with your setup. Through i haven't checked how it is on host, but shouldn't be much faster as all physical cores are properly maxed out when building.
Check what virtualization indicator shows - if it is "native", then you have to uninstall hyper-v to let VB run its own hypervisor. Although i'm unsure if it is the cause of such horrible performance.

[Basilisk-Dev]

Check what virtualization indicator shows - if it is "native", then you have to uninstall hyper-v to let VB run its own hypervisor. Although i'm unsure if it is the cause of such horrible performance.

It shows that it's using VT-x/AMD-V so it is properly using the virtualization extensions of the processor. I'm also on Linux so no Hyper-V here

[leothetechguy]

I would recommend qemu with kvm. A Kernel-based Virtual Machine might have a lot less overhead, and I made progress with compiling a linux distro on these VMs (The only reason i didn't have enough time was that it was a 4-stage build, with the distro bootstrapping itself over and over again).