8 way guest with 3gb of RAM

half load, npt, virtio

Elapsed Time 105.7 (0.844156)
User Time 352.192 (0.570412)
System Time 44.61 (0.661891)
Percent CPU 375 (3.08221)
Context Switches 36757.4 (357.547)
Sleeps 49590.6 (157.262)

optimal load, npt, virtio

Elapsed Time 63.752 (0.514558)
User Time 362.593 (10.9713)
System Time 45.211 (0.815277)
Percent CPU 515.7 (148.364)
Context Switches 44685.5 (8360.59)
Sleeps 52474.1 (3053.95)

half load, native, loop

Elapsed Time 97.596 (0.782643)
User Time 331.512 (0.489816)
System Time 34.064 (0.244193)
Percent CPU 374 (2.91548)
Context Switches 34396 (403.417)
Sleeps 58373.4 (169.623)

optimal load, native, loop

Elapsed Time 57.896 (0.477106)
User Time 339.928 (8.8824)
System Time 34.255 (0.332474)
Percent CPU 517.3 (151.115)
Context Switches 38773.3 (4663.54)
Sleeps 58043.5 (467.203)