Spirit performance on the granular chute flow benchmark

Processors: 1 8 64 512
Fixed CPU secs: 2.98 0.437 0.071 0.113
Fixed || Efficiency: 100.0% 85.3% 65.3% 5.17%
Scaled CPU secs: 2.98 4.55 4.21 4.64
Scaled || Efficiency: 100% 65.5% 70.9% 64.4%