Question about sparse files

[John Groves <John@xxxxxxxxxxxxxx>]

A question for those who know more about xfs internals than me:

If want to create sparse files that XFS can handle efficiently, is there 
an optimal minimum sparse chunk size?  I can look at an data stream for 
null segments and make them sparse, but I presume I shouldn't make 1 
byte sparse extents.  File size will range from small to multiple GB, 
but large files are the norm.

Thanks,
John Groves