Linux: A faster way to delete millions of files in a directory

A faster way to delete millions of files in a directory
Source:
http://linuxnote.net/jianingy/en/linux/a-fast-way-to-remove-huge-number-of-files.html
Conclusion: use 'rsync'

...

(The # of files is 1000000. Each of them has 0 size.)

Command	Elapsed	System Time	%CPU	cs1 (Vol/Invol)
rsync -a –delete empty/ a	10.60	1.31	95	106/22
find b/ -type f -delete	28.51	14.46	52	14849/11
find c/ -type f | xargs -L 100 rm2	41.69	20.60	54	37048/15074
find d/ -type f | xargs -L 100 -P 100 rm2	34.32	27.82	89	929897/21720
rm -rf f	31.29	14.80	47	15134/11

...

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Cheers,
June