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]
> convert=
> EOF
$ hg init t
$ cd t
$ echo a >> a
$ hg ci -Am a0 -d '1 0'
adding a
$ hg branch brancha
marked working directory as branch brancha
(branches are permanent and global, did you want a bookmark?)
$ echo a >> a
$ hg ci -m a1 -d '2 0'
$ echo a >> a
$ hg ci -m a2 -d '3 0'
$ echo a >> a
$ hg ci -m a3 -d '4 0'
$ hg up -C 0
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg branch branchb
marked working directory as branch branchb
$ echo b >> b
$ hg ci -Am b0 -d '6 0'
adding b
$ hg up -C brancha
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ echo a >> a
$ hg ci -m a4 -d '5 0'
$ echo a >> a
$ hg ci -m a5 -d '7 0'
$ echo a >> a
$ hg ci -m a6 -d '8 0'
$ hg up -C branchb
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo b >> b
$ hg ci -m b1 -d '9 0'
$ hg up -C 0
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ echo c >> c
$ hg branch branchc
marked working directory as branch branchc
$ hg ci -Am c0 -d '10 0'
adding c
$ hg up -C brancha
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg ci --close-branch -m a7x -d '11 0'
$ hg up -C branchb
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg ci --close-branch -m b2x -d '12 0'
$ hg up -C branchc
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg merge branchb
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg ci -m c1 -d '13 0'
$ cd ..
convert with datesort
$ hg convert --datesort t t-datesort
initializing destination t-datesort repository
scanning source...
sorting...
converting...
12 a0
11 a1
10 a2
9 a3
8 a4
7 b0
6 a5
5 a6
4 b1
3 c0
2 a7x
1 b2x
0 c1
graph converted repo
$ hg -R t-datesort log -G --template '{rev} "{desc}"\n'
o 12 "c1"
|\
| _ 11 "b2x"
| |
| | _ 10 "a7x"
| | |
o | | 9 "c0"
| | |
| o | 8 "b1"
| | |
| | o 7 "a6"
| | |
| | o 6 "a5"
| | |
| o | 5 "b0"
|/ /
| o 4 "a4"
| |
| o 3 "a3"
| |
| o 2 "a2"
| |
| o 1 "a1"
|/
o 0 "a0"
convert with datesort (default mode)
$ hg convert t t-sourcesort
initializing destination t-sourcesort repository
scanning source...
sorting...
converting...
12 a0
11 a1
10 a2
9 a3
8 b0
7 a4
6 a5
5 a6
4 b1
3 c0
2 a7x
1 b2x
0 c1
graph converted repo
$ hg -R t-sourcesort log -G --template '{rev} "{desc}"\n'
o 12 "c1"
|\
| _ 11 "b2x"
| |
| | _ 10 "a7x"
| | |
o | | 9 "c0"
| | |
| o | 8 "b1"
| | |
| | o 7 "a6"
| | |
| | o 6 "a5"
| | |
| | o 5 "a4"
| | |
| o | 4 "b0"
|/ /
| o 3 "a3"
| |
| o 2 "a2"
| |
| o 1 "a1"
|/
o 0 "a0"
convert with closesort
$ hg convert --closesort t t-closesort
initializing destination t-closesort repository
scanning source...
sorting...
converting...
12 a0
11 a1
10 a2
9 a3
8 b0
7 a4
6 a5
5 a6
4 a7x
3 b1
2 b2x
1 c0
0 c1
graph converted repo
$ hg -R t-closesort log -G --template '{rev} "{desc}"\n'
o 12 "c1"
|\
| o 11 "c0"
| |
_ | 10 "b2x"
| |
o | 9 "b1"
| |
| | _ 8 "a7x"
| | |
| | o 7 "a6"
| | |
| | o 6 "a5"
| | |
| | o 5 "a4"
| | |
o | | 4 "b0"
|/ /
| o 3 "a3"
| |
| o 2 "a2"
| |
| o 1 "a1"
|/
o 0 "a0"