localrepo: commit: avoid calling expensive ancestor function when p1 is nullrev
ancestors: remove unnecessary handling of 'left'
If one of the initial nodes also is an ancestor then that most be the only
ancestor. There is no need for additional bookkeeping.
parsers: remove unreachable and invalid code in index_ancestors
The function normally returns a list. Returning a single element instead of a
list with one element would be weird.
cmdutil: implemented new lazy increasingwindows
Now log can work in a lazy way and get results as soon as they are processed.
Performance Benchmarking:
$ time hg log -l1 -qr "branch(default)"
0:
9117c6561b0b
real 0m2.303s
user 0m2.252s
sys 0m0.048s
$ time ./hg log -l1 -qr "branch(default)"
0:
9117c6561b0b
real 0m0.238s
user 0m0.199s
sys 0m0.037s
revset: added __nonzero__ method to lazyset
Now it doesn't have to go through all the set and can return lazily as soon as
it finds one element.