phases: avoid N² behavior in `advanceboundary`
We allowed duplicated entries in the deque, which each entry could potentially
insert all its ancestors. So advancing boundary for the full repository would
mean each revision would walk all its ancestors, resulting in O(N²) iteration.
For repository of any decent size, N² is quickly insane.
We introduce a simple set to avoid this and get back to reasonable performance.
$ cat >> $HGRCPATH <<EOF
> [extensions]
> rebase=
>
> [phases]
> publish=False
>
> [alias]
> tglog = log -G --template "{rev}: {node|short} '{desc}' {branches}\n"
> EOF
$ hg init a
$ cd a
$ echo c1 > c1
$ hg ci -Am c1
adding c1
$ echo c2 > c2
$ hg ci -Am c2
adding c2
$ echo l1 > l1
$ hg ci -Am l1
adding l1
$ hg up -q -C 1
$ echo r1 > r1
$ hg ci -Am r1
adding r1
created new head
$ echo r2 > r2
$ hg ci -Am r2
adding r2
$ hg tglog
@ 4: 225af64d03e6 'r2'
|
o 3: 8d0a8c99b309 'r1'
|
| o 2: 87c180a611f2 'l1'
|/
o 1: 56daeba07f4b 'c2'
|
o 0: e8faad3d03ff 'c1'
Rebase with no arguments - single revision in source branch:
$ hg up -q -C 2
$ hg rebase
rebasing 2:87c180a611f2 "l1"
saved backup bundle to $TESTTMP/a/.hg/strip-backup/87c180a611f2-a5be192d-rebase.hg
$ hg tglog
@ 4: b1152cc99655 'l1'
|
o 3: 225af64d03e6 'r2'
|
o 2: 8d0a8c99b309 'r1'
|
o 1: 56daeba07f4b 'c2'
|
o 0: e8faad3d03ff 'c1'
$ cd ..
$ hg init b
$ cd b
$ echo c1 > c1
$ hg ci -Am c1
adding c1
$ echo c2 > c2
$ hg ci -Am c2
adding c2
$ echo l1 > l1
$ hg ci -Am l1
adding l1
$ echo l2 > l2
$ hg ci -Am l2
adding l2
$ hg up -q -C 1
$ echo r1 > r1
$ hg ci -Am r1
adding r1
created new head
$ hg tglog
@ 4: 8d0a8c99b309 'r1'
|
| o 3: 1ac923b736ef 'l2'
| |
| o 2: 87c180a611f2 'l1'
|/
o 1: 56daeba07f4b 'c2'
|
o 0: e8faad3d03ff 'c1'
Rebase with no arguments - single revision in target branch:
$ hg up -q -C 3
$ hg rebase
rebasing 2:87c180a611f2 "l1"
rebasing 3:1ac923b736ef "l2"
saved backup bundle to $TESTTMP/b/.hg/strip-backup/87c180a611f2-b980535c-rebase.hg
$ hg tglog
@ 4: 023181307ed0 'l2'
|
o 3: 913ab52b43b4 'l1'
|
o 2: 8d0a8c99b309 'r1'
|
o 1: 56daeba07f4b 'c2'
|
o 0: e8faad3d03ff 'c1'
$ cd ..