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Table 2 Tukey’s HSD test with groupings

From: A parallel and distributed stochastic gradient descent implementation using commodity clusters

  Training time Groups
16 71.06 a
8 36.74 b
1 22.82 c
4 22.78 c
2 21.98 c
  1. The slowest is the 16 node cluster, second slowest is the 8 node cluster, and all clusters in group “C” have no difference in training time
  2. Training time vs. # nodes, 1:1