NVMe delete rates.

	A	B	C	D
1		xfs	ext4	btrfs
2	1	1.37	0.7	2.08
3	2	2.85	1.45	4.35
4	4	5.94	3.07	8.47
5	8	12.64	6.79	17.32
6	16	24.52	19.39	35.33
7	32	48.89	48.07	71.82
8	64	100.8	110.1	146.13
9	128	212.76	235.87	364.59
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