revset-parentspec: call 'getset' on a 'fullreposet' Calling 'baseset(repo.changelog)' builds a list for all revisions in the repo. And we already have the lazy and efficient 'fullreposet' class for this purpose. This gives us the usual benefits of the fullreposet: revset) 100^1 before) wall 0.002694 comb 0.000000 user 0.000000 sys 0.000000 (best of 897) after) wall 0.000997 comb 0.000000 user 0.000000 sys 0.000000 (best of 2324) revset) parents(100)^1 before) wall 0.003832 comb 0.000000 user 0.000000 sys 0.000000 (best of 587) after) wall 0.001034 comb 0.000000 user 0.000000 sys 0.000000 (best of 2309) revset) (100^1)^1 before) wall 0.005616 comb 0.000000 user 0.000000 sys 0.000000 (best of 405) after) wall 0.001030 comb 0.000000 user 0.000000 sys 0.000000 (best of 2258)