Pipe: improve incremental memory estimation #30128

Job	Run time
unit-test (17, windows-latest, others)	21m 14s
unit-test (17, ubuntu-latest, others)	16m 14s
unit-test (17, windows-latest, datanode)	43m 25s
unit-test (17, ubuntu-latest, datanode)	30m 14s
	1h 51m 7s

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