Merge branch 'BackpressureCombiner' into combined2 #197

Job	Run time
AMD64 macOS 13 Python 3	10m 20s
AMD64 Conda Python 3.10 Sphinx & Numpydoc	6m 49s
AMD64 Conda Python 3.9 Pandas 1.1.3	5m 33s
AMD64 Conda Python 3.11 without NumPy	5m 14s
AMD64 Conda Python 3.10 Without Pandas	5m 27s
ARM64 macOS 14 Python 3	4m 56s
AMD64 Conda Python 3.11 Pandas latest	6m 23s
	44m 42s

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