Spirit performance on the polymer chain melt benchmark

Processors: 1 8 64 512
Fixed CPU secs: 3.74 0.444 0.117 0.202
Fixed || Efficiency: 100% 105% 50.0% 3.62%
Scaled CPU secs: 3.74 4.56 4.71 6.07
Scaled || Efficiency: 100% 82.1% 79.3% 61.6%