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A general description is here.
‘duplicated()’ and ‘unique()’ gain a ‘nmax’ argument which can be used to make them more efficient when it is known that there are only a small number of unique entries. This is done automatically for factors.
The limit for ‘R_alloc’ on 64-bit platforms has been raised to just under 32GB (from just under 16GB).
The ‘X11()’ device has some more protection against being used with forked processes _via_ package ‘parallel’.
‘duplicated()’, ‘unique()’ and similar now support vectors of lengths above 2^29 on 64-bit platforms.
‘parallel::stopCluster()’ now works with MPI clusters without ‘snow’ being on the search path.