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Coalesced RDD , large scale
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OpenJDK 64-Bit Server VM 17.0.16+8-LTS on Linux 6.11.0-1018-azure
AMD EPYC 7763 64-Core Processor
Coalesced RDD:                                Best Time(ms)   Avg Time(ms)   Stdev(ms)    Rate(M/s)   Per Row(ns)   Relative
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Coalesce Num Partitions: 100 Num Hosts: 1               139            150          13          0.7        1388.1       1.0X
Coalesce Num Partitions: 100 Num Hosts: 5               109            110           1          0.9        1089.8       1.3X
Coalesce Num Partitions: 100 Num Hosts: 10               95            105          15          1.0         954.0       1.5X
Coalesce Num Partitions: 100 Num Hosts: 20               92             98           9          1.1         921.3       1.5X
Coalesce Num Partitions: 100 Num Hosts: 40               91             93           2          1.1         912.2       1.5X
Coalesce Num Partitions: 100 Num Hosts: 80               90             96           8          1.1         897.0       1.5X
Coalesce Num Partitions: 500 Num Hosts: 1               314            319           5          0.3        3143.2       0.4X
Coalesce Num Partitions: 500 Num Hosts: 5               149            151           3          0.7        1492.4       0.9X
Coalesce Num Partitions: 500 Num Hosts: 10              112            116           5          0.9        1120.0       1.2X
Coalesce Num Partitions: 500 Num Hosts: 20              102            102           0          1.0        1017.6       1.4X
Coalesce Num Partitions: 500 Num Hosts: 40               92             97           8          1.1         918.3       1.5X
Coalesce Num Partitions: 500 Num Hosts: 80               90             92           3          1.1         898.4       1.5X
Coalesce Num Partitions: 1000 Num Hosts: 1              528            531           4          0.2        5282.1       0.3X
Coalesce Num Partitions: 1000 Num Hosts: 5              177            177           0          0.6        1768.9       0.8X
Coalesce Num Partitions: 1000 Num Hosts: 10             146            147           2          0.7        1457.7       1.0X
Coalesce Num Partitions: 1000 Num Hosts: 20             109            110           2          0.9        1085.2       1.3X
Coalesce Num Partitions: 1000 Num Hosts: 40              99            101           1          1.0         992.1       1.4X
Coalesce Num Partitions: 1000 Num Hosts: 80              93             94           1          1.1         928.0       1.5X
Coalesce Num Partitions: 5000 Num Hosts: 1             2321           2328           6          0.0       23205.7       0.1X
Coalesce Num Partitions: 5000 Num Hosts: 5              687            692           7          0.1        6870.2       0.2X
Coalesce Num Partitions: 5000 Num Hosts: 10             386            389           3          0.3        3861.2       0.4X
Coalesce Num Partitions: 5000 Num Hosts: 20             240            242           2          0.4        2399.8       0.6X
Coalesce Num Partitions: 5000 Num Hosts: 40             173            179          10          0.6        1729.4       0.8X
Coalesce Num Partitions: 5000 Num Hosts: 80             128            131           3          0.8        1277.8       1.1X
Coalesce Num Partitions: 10000 Num Hosts: 1            4233           4245          12          0.0       42331.1       0.0X
Coalesce Num Partitions: 10000 Num Hosts: 5            1376           1382           5          0.1       13757.6       0.1X
Coalesce Num Partitions: 10000 Num Hosts: 10            702            707           5          0.1        7019.0       0.2X
Coalesce Num Partitions: 10000 Num Hosts: 20            406            408           2          0.2        4059.0       0.3X
Coalesce Num Partitions: 10000 Num Hosts: 40            247            248           1          0.4        2466.7       0.6X
Coalesce Num Partitions: 10000 Num Hosts: 80            165            171           5          0.6        1654.9       0.8X