R Under development (unstable) (2024-01-11 r85801 ucrt) -- "Unsuffered Consequences"
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> library(testthat)
> test_check("ff")
Loading required package: ff
Loading required package: bit

Attaching package: 'bit'

The following object is masked from 'package:base':

    xor

Attaching package ff
- getOption("fftempdir")=="D:/temp/RtmpI3VE7B/ff"

- getOption("ffextension")=="ff"

- getOption("ffdrop")==TRUE

- getOption("fffinonexit")==TRUE

- getOption("ffpagesize")==65536

- getOption("ffcaching")=="mmnoflush"  -- consider "ffeachflush" if your system stalls on large writes

- getOption("ffbatchbytes")==16777216 -- consider a different value for tuning your system

- getOption("ffmaxbytes")==536870912 -- consider a different value for tuning your system


Attaching package: 'ff'

The following objects are masked from 'package:utils':

    write.csv, write.csv2

The following objects are masked from 'package:base':

    is.factor, is.ordered

[ FAIL 0 | WARN 0 | SKIP 0 | PASS 966 ]
> 
> 
> 
> proc.time()
   user  system elapsed 
   5.48    0.81    6.29