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> Added support for using Hyper-V as the fallback execution core on Windows host, to avoid inability to run VMs at the price of reduced performance Any compari

by orf 8y ago

> Added support for using Hyper-V as the fallback execution core on Windows host, to avoid inability to run VMs at the price of reduced performance Any comparisons between hyper-v and virtual box performance? I would have assumed hyper-v would be more performant.

Daviey 8y ago
Out of curiosity, why do you have a presumption that hyper-v would have better performance?
- orf 8y ago
  This may be completely wrong, but as I understand it when you enable hyper-v it sits above your Windows install, and runs your windows as a hyper-v VM. So, rather than running a userland vbox process that has OS overhead (especially around disk IO) it can run much closer to the metal.
  - zamalek 8y ago
    If I remember correctly, Hyper-V is not strictly a type 1 hypervisor ("runs your windows as a hyper-v VM") but comes close. The VMs still run pretty close to the metal, but your host OS is mostly free from hypervisor interference.
- jsjohnst 8y ago
  Because it’s a well known fact that VirtualBox has been dodgy slow for years. Especially around I/O, it’s been the laggard.
- kls 8y ago
  VB has lagged in support for good hardware acceleration, it's been an issue for years.
dagw 8y ago
Tested them quite a bit about 18 month ago and hyper-v was slightly faster in the benchmarks I ran (especially when it came to IO), but was a laggy stuttering mess when trying to use a Linux desktop.
nickjj 8y ago
In a straight up VirtualBox vs Hyper-V scenario the I/O performance on Hyper-V is a lot better, and that's not based on contrived benchmarks either. I've used both for full time development. It only took about a day of using VirtualBox with sync'd folders to look for alternative solutions due to how bad it was about 4 years ago (not sure about today). Also, VMWare Player is / was so much faster than VirtualBox, and is on par with Hyper-V's performance. Currently I use Hyper-V today because it's the back-end for Docker for Windows. I couldn't be happier with the performance.
crazysim 8y ago
I really wish VMware would support this. I'm surprised Virtualbox has a technical advantage here.

by orf 8y ago

Daviey 8y ago

Out of curiosity, why do you have a presumption that hyper-v would have better performance?

orf 8y ago
This may be completely wrong, but as I understand it when you enable hyper-v it sits above your Windows install, and runs your windows as a hyper-v VM. So, rather than running a userland vbox process that has OS overhead (especially around disk IO) it can run much closer to the metal.
- zamalek 8y ago
  If I remember correctly, Hyper-V is not strictly a type 1 hypervisor ("runs your windows as a hyper-v VM") but comes close. The VMs still run pretty close to the metal, but your host OS is mostly free from hypervisor interference.
jsjohnst 8y ago
Because it’s a well known fact that VirtualBox has been dodgy slow for years. Especially around I/O, it’s been the laggard.
kls 8y ago
VB has lagged in support for good hardware acceleration, it's been an issue for years.

dagw 8y ago

Tested them quite a bit about 18 month ago and hyper-v was slightly faster in the benchmarks I ran (especially when it came to IO), but was a laggy stuttering mess when trying to use a Linux desktop.

nickjj 8y ago

In a straight up VirtualBox vs Hyper-V scenario the I/O performance on Hyper-V is a lot better, and that's not based on contrived benchmarks either. I've used both for full time development. It only took about a day of using VirtualBox with sync'd folders to look for alternative solutions due to how bad it was about 4 years ago (not sure about today). Also, VMWare Player is / was so much faster than VirtualBox, and is on par with Hyper-V's performance. Currently I use Hyper-V today because it's the back-end for Docker for Windows. I couldn't be happier with the performance.

crazysim 8y ago

I really wish VMware would support this. I'm surprised Virtualbox has a technical advantage here.