time,rate,errr
64,0.0357,0.0249
128,0.0329,0.0109
256,0.0255,0.00718
512,0.0262,0.00632
1024,0.0199,0.00354
2048,0.0124,0.00182
4096,0.00849,0.00134
8192,0.00586,0.000764