xbl-memory-data

	A	B	C	D
1	# of spans	mem with xbl	mem w/out xbl	diff
2	1	327400	260648	66752
3	10	328904	263176	65728
4	100	396088	294088	102000
5	1000	982120	577352	404768
6	10000	6825992	3451208	3374784
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