Pipe: improve incremental memory estimation #29875

Job	Run time
unit-test (17, ubuntu-latest, datanode)	24m 24s
unit-test (17, ubuntu-latest, others)	20m 23s
unit-test (17, windows-latest, datanode)	32m 0s
unit-test (17, windows-latest, others)	27m 10s
	1h 43m 57s

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