Proof-of-concept code for purging with smallset
Proof-of-concept code for purging with smallset

Currently slower due to (unnecessary) extra scan pass over the sieve region.
Building the survivor list should be done as part of
search_survivors_in_line().

mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs