NULL or the number of tied values (including NA). Providing
nties can speed-up when x has no cache. Note that a wrong nties can
cause undefined behaviour up to a crash.
method
NULL for automatic method selection or a suitable low-level
method, see details
Details
This function automatically chooses from several low-level functions
considering the size of x and the availability of a cache.
Suitable methods are
sortordertie (fast ordering)
ordertie (memory saving ordering).
See Also
rank.integer64() for possibly tied ranks and unipos.integer64()
for positions of unique values.