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Limit GroupByCombineOperator to use 2 * numCores threads instead of creating one task per operator #31176

Limit GroupByCombineOperator to use 2 * numCores threads instead of creating one task per operator

Limit GroupByCombineOperator to use 2 * numCores threads instead of creating one task per operator #31176

Job Run time
40m 24s
40m 0s
51m 23s
40m 12s
39m 12s
48m 20s
38m 47s
40m 29s
2m 29s
38m 7s
19m 0s
46m 52s
46m 27s
18m 57s
18m 26s
42m 15s
37m 57s
44m 52s
41m 4s
43m 32s
41m 10s
12h 59m 55s