The CRAN policy asks for minimal package size, which includes installed size.
Please re-read 'Writing R Extensions' §1.1.6. That LazyDataCompression is not used gives a warning in R-devel. Using the CheckLazyDataCompression() function in that section gives (database sizes in KB)
So there are substantial gains by adding
LazyDataCompression: xz
to the DESCRIPTION file,
Please add this ASAP and before Apr 21 to safely retain the package on CRAN.
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