anchor.diff:  eu-west-1.linux.m1.small,0.095
   eu-west-1.linux.m1.large,0.38
   eu-west-1.linux.m1.xlarge,0.76
  +eu-west-1.linux.m2.xlarge,0.57
   eu-west-1.linux.m2.2xlarge,1.34
   eu-west-1.linux.m2.4xlarge,2.68
   eu-west-1.linux.c1.medium,0.19
  
positive.code: us-west-1.linux.m1.small,0.095
  us-west-1.linux.m1.large,0.38
  us-west-1.linux.m1.xlarge,0.76
  us-west-1.linux.m2.2xlarge,1.34
  us-west-1.linux.m2.4xlarge,2.68
  us-west-1.linux.c1.medium,0.19
  
negative.code: us-east-1.windows.m1.small,0.12
  us-east-1.windows.m1.large,0.48
  us-east-1.windows.m1.xlarge,0.96
  us-east-1.windows.m2.xlarge,0.62
  us-east-1.windows.m2.2xlarge,1.44
  us-east-1.windows.m2.4xlarge,2.88
  us-east-1.windows.c1.medium,0.29
  