view tests/test-bisect2.t @ 44363:f7459da77f23

nodemap: introduce an option to use mmap to read the nodemap mapping

The performance and memory benefit is much greater if we don't have to copy all
the data in memory for each information. So we introduce an option (on by
default) to read the data using mmap.

This changeset is the last one definition the API for index support nodemap
data. (they have to be able to use the mmaping).

Below are some benchmark comparing the best we currently have in 5.3 with the
final step of this series (using the persistent nodemap implementation in
Rust). The benchmark run `hg perfindex` with various revset and the following
variants:

Before:

 * do not use the persistent nodemap
 * use the CPython implementation of the index for nodemap
 * use mmapping of the changelog index

After:

 * use the MixedIndex Rust code, with the NodeTree object for nodemap access
   (still in review)
 * use the persistent nodemap data from disk
 * access the persistent nodemap data through mmap
 * use mmapping of the changelog index

The persistent nodemap greatly speed up  most operation on very large
repositories. Some of the previously very fast lookup end up a bit slower because
the persistent nodemap has to be setup. However the absolute slowdown is very
small and won't matters in the big picture.

Here are some numbers (in seconds) for the reference copy of mozilla-try:

Revset            Before   After     abs-change speedup

-10000:           0.004622 0.005532   0.000910  ×   0.83
-10:              0.000050 0.000132   0.000082  ×   0.37
tip               0.000052 0.000085   0.000033  ×   0.61
0 + (-10000:)     0.028222 0.005337  -0.022885  ×   5.29
0                 0.023521 0.000084  -0.023437  × 280.01
(-10000:) + 0     0.235539 0.005308  -0.230231  ×  44.37
(-10:) + :9       0.232883 0.000180  -0.232703  ×1293.79
(-10000:) + (:99) 0.238735 0.005358  -0.233377  ×  44.55
:99 + (-10000:)   0.317942 0.005593  -0.312349  ×  56.84
:9 + (-10:)       0.313372 0.000179  -0.313193  ×1750.68
:9                0.316450 0.000143  -0.316307  ×2212.93


On smaller repositories, the cost of nodemap related operation is not as big, so
the win is much more modest. Yet it helps shaving a handful of millisecond here
and there.

Here are some numbers (in seconds) for the reference copy of mercurial:

Revset            Before   After     abs-change speedup
-10:              0.000065 0.000097   0.000032  × 0.67
tip               0.000063 0.000078   0.000015  × 0.80
0                 0.000561 0.000079  -0.000482  × 7.10
-10000:           0.004609 0.003648  -0.000961  × 1.26
0 + (-10000:)     0.005023 0.003715  -0.001307  × 1.35
(-10:) + :9       0.002187 0.000108  -0.002079  ×20.25
(-10000:) + 0     0.006252 0.003716  -0.002536  × 1.68
(-10000:) + (:99) 0.006367 0.003707  -0.002660  × 1.71
:9 + (-10:)       0.003846 0.000110  -0.003736  ×34.96
:9                0.003854 0.000099  -0.003755  ×38.92
:99 + (-10000:)   0.007644 0.003778  -0.003866  × 2.02

Differential Revision: https://phab.mercurial-scm.org/D7894

# The tests in test-bisect are done on a linear history. Here the
# following repository history is used for testing:
#
#                      17
#                       |
#                18    16
#                  \  /
#                   15
#                  /  \
#                 /    \
#               10     13
#               / \     |
#              /   \    |  14
#         7   6     9  12 /
#          \ / \    |   |/
#           4   \   |  11
#            \   \  |  /
#             3   5 | /
#              \ /  |/
#               2   8
#                \ /
#                 1
#                 |
#                 0

init

  $ hg init

committing changes

  $ echo > a
  $ echo '0' >> a
  $ hg add a
  $ hg ci -m "0" -d "0 0"
  $ echo '1' >> a
  $ hg ci -m "1" -d "1 0"
  $ echo '2' >> a
  $ hg ci -m "2" -d "2 0"
  $ echo '3' >> a
  $ hg ci -m "3" -d "3 0"
  $ echo '4' >> a
  $ hg ci -m "4" -d "4 0"

create branch

  $ hg up -r 2
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo '5' >> b
  $ hg add b
  $ hg ci -m "5" -d "5 0"
  created new head

merge

  $ hg merge
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg ci -m "merge 4,5" -d "6 0"

create branch

  $ hg up -r 4
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo '7' > c
  $ hg add c
  $ hg ci -m "7" -d "7 0"
  created new head

create branch

  $ hg up -r 1
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo '8' > d
  $ hg add d
  $ hg ci -m "8" -d "8 0"
  created new head
  $ echo '9' >> d
  $ hg ci -m "9" -d "9 0"

merge

  $ hg merge -r 6
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg ci -m "merge 6,9" -d "10 0"

create branch

  $ hg up -r 8
  2 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo '11' > e
  $ hg add e
  $ hg ci -m "11" -d "11 0"
  created new head
  $ echo '12' >> e
  $ hg ci -m "12" -d "12 0"
  $ echo '13' >> e
  $ hg ci -m "13" -d "13 0"

create branch

  $ hg up -r 11
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo '14' > f
  $ hg add f
  $ hg ci -m "14" -d "14 0"
  created new head

merge

  $ hg up -r 13 -C
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg merge -r 10
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg ci -m "merge 10,13" -d "15 0"
  $ echo '16' >> e
  $ hg ci -m "16" -d "16 0"
  $ echo '17' >> e
  $ hg ci -m "17" -d "17 0"

create branch

  $ hg up -r 15
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo '18' >> e
  $ hg ci -m "18" -d "18 0"
  created new head

log

  $ hg log
  changeset:   18:d42e18c7bc9b
  tag:         tip
  parent:      15:857b178a7cf3
  user:        test
  date:        Thu Jan 01 00:00:18 1970 +0000
  summary:     18
  
  changeset:   17:228c06deef46
  user:        test
  date:        Thu Jan 01 00:00:17 1970 +0000
  summary:     17
  
  changeset:   16:609d82a7ebae
  user:        test
  date:        Thu Jan 01 00:00:16 1970 +0000
  summary:     16
  
  changeset:   15:857b178a7cf3
  parent:      13:b0a32c86eb31
  parent:      10:429fcd26f52d
  user:        test
  date:        Thu Jan 01 00:00:15 1970 +0000
  summary:     merge 10,13
  
  changeset:   14:faa450606157
  parent:      11:82ca6f06eccd
  user:        test
  date:        Thu Jan 01 00:00:14 1970 +0000
  summary:     14
  
  changeset:   13:b0a32c86eb31
  user:        test
  date:        Thu Jan 01 00:00:13 1970 +0000
  summary:     13
  
  changeset:   12:9f259202bbe7
  user:        test
  date:        Thu Jan 01 00:00:12 1970 +0000
  summary:     12
  
  changeset:   11:82ca6f06eccd
  parent:      8:dab8161ac8fc
  user:        test
  date:        Thu Jan 01 00:00:11 1970 +0000
  summary:     11
  
  changeset:   10:429fcd26f52d
  parent:      9:3c77083deb4a
  parent:      6:a214d5d3811a
  user:        test
  date:        Thu Jan 01 00:00:10 1970 +0000
  summary:     merge 6,9
  
  changeset:   9:3c77083deb4a
  user:        test
  date:        Thu Jan 01 00:00:09 1970 +0000
  summary:     9
  
  changeset:   8:dab8161ac8fc
  parent:      1:4ca5088da217
  user:        test
  date:        Thu Jan 01 00:00:08 1970 +0000
  summary:     8
  
  changeset:   7:50c76098bbf2
  parent:      4:5c668c22234f
  user:        test
  date:        Thu Jan 01 00:00:07 1970 +0000
  summary:     7
  
  changeset:   6:a214d5d3811a
  parent:      5:385a529b6670
  parent:      4:5c668c22234f
  user:        test
  date:        Thu Jan 01 00:00:06 1970 +0000
  summary:     merge 4,5
  
  changeset:   5:385a529b6670
  parent:      2:051e12f87bf1
  user:        test
  date:        Thu Jan 01 00:00:05 1970 +0000
  summary:     5
  
  changeset:   4:5c668c22234f
  user:        test
  date:        Thu Jan 01 00:00:04 1970 +0000
  summary:     4
  
  changeset:   3:0950834f0a9c
  user:        test
  date:        Thu Jan 01 00:00:03 1970 +0000
  summary:     3
  
  changeset:   2:051e12f87bf1
  user:        test
  date:        Thu Jan 01 00:00:02 1970 +0000
  summary:     2
  
  changeset:   1:4ca5088da217
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     1
  
  changeset:   0:33b1f9bc8bc5
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     0
  

hg up -C

  $ hg up -C
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  updated to "d42e18c7bc9b: 18"
  3 other heads for branch "default"

complex bisect test 1  # first bad rev is 9

  $ hg bisect -r
  $ hg bisect -g 0
  $ hg bisect -b 17   # -> update to rev 6
  Testing changeset 6:a214d5d3811a (15 changesets remaining, ~3 tests)
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ hg log -q -r 'bisect(pruned)'
  0:33b1f9bc8bc5
  17:228c06deef46
  $ hg log -q -r 'bisect(untested)'
  1:4ca5088da217
  2:051e12f87bf1
  3:0950834f0a9c
  4:5c668c22234f
  5:385a529b6670
  6:a214d5d3811a
  8:dab8161ac8fc
  9:3c77083deb4a
  10:429fcd26f52d
  11:82ca6f06eccd
  12:9f259202bbe7
  13:b0a32c86eb31
  15:857b178a7cf3
  16:609d82a7ebae
  $ hg log -q -r 'bisect(ignored)'
  $ hg bisect -g      # -> update to rev 13
  Testing changeset 13:b0a32c86eb31 (9 changesets remaining, ~3 tests)
  3 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg bisect -s      # -> update to rev 10
  Testing changeset 10:429fcd26f52d (9 changesets remaining, ~3 tests)
  3 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg bisect -b      # -> update to rev 8
  Testing changeset 8:dab8161ac8fc (3 changesets remaining, ~1 tests)
  2 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg bisect -g      # -> update to rev 9
  Testing changeset 9:3c77083deb4a (2 changesets remaining, ~1 tests)
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg bisect -b
  The first bad revision is:
  changeset:   9:3c77083deb4a
  user:        test
  date:        Thu Jan 01 00:00:09 1970 +0000
  summary:     9
  
  $ hg log -q -r 'bisect(range)'
  0:33b1f9bc8bc5
  1:4ca5088da217
  2:051e12f87bf1
  3:0950834f0a9c
  4:5c668c22234f
  5:385a529b6670
  6:a214d5d3811a
  8:dab8161ac8fc
  9:3c77083deb4a
  10:429fcd26f52d
  11:82ca6f06eccd
  12:9f259202bbe7
  13:b0a32c86eb31
  15:857b178a7cf3
  16:609d82a7ebae
  17:228c06deef46
  $ hg log -q -r 'bisect(pruned)'
  0:33b1f9bc8bc5
  1:4ca5088da217
  2:051e12f87bf1
  3:0950834f0a9c
  4:5c668c22234f
  5:385a529b6670
  6:a214d5d3811a
  8:dab8161ac8fc
  9:3c77083deb4a
  10:429fcd26f52d
  13:b0a32c86eb31
  15:857b178a7cf3
  16:609d82a7ebae
  17:228c06deef46
  18:d42e18c7bc9b
  $ hg log -q -r 'bisect(untested)'
  11:82ca6f06eccd
  12:9f259202bbe7
  $ hg log -q -r 'bisect(goods)'
  0:33b1f9bc8bc5
  1:4ca5088da217
  2:051e12f87bf1
  3:0950834f0a9c
  4:5c668c22234f
  5:385a529b6670
  6:a214d5d3811a
  8:dab8161ac8fc
  $ hg log -q -r 'bisect(bads)'
  9:3c77083deb4a
  10:429fcd26f52d
  15:857b178a7cf3
  16:609d82a7ebae
  17:228c06deef46
  18:d42e18c7bc9b

complex bisect test 2  # first good rev is 13

  $ hg bisect -r
  $ hg bisect -g 18
  $ hg bisect -b 1    # -> update to rev 6
  Testing changeset 6:a214d5d3811a (13 changesets remaining, ~3 tests)
  2 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg bisect -s      # -> update to rev 10
  Testing changeset 10:429fcd26f52d (13 changesets remaining, ~3 tests)
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg log -q -r 'bisect(pruned)'
  0:33b1f9bc8bc5
  1:4ca5088da217
  6:a214d5d3811a
  18:d42e18c7bc9b
  $ hg bisect -b      # -> update to rev 12
  Testing changeset 12:9f259202bbe7 (5 changesets remaining, ~2 tests)
  3 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg log -q -r 'bisect(pruned)'
  0:33b1f9bc8bc5
  1:4ca5088da217
  2:051e12f87bf1
  3:0950834f0a9c
  4:5c668c22234f
  5:385a529b6670
  6:a214d5d3811a
  8:dab8161ac8fc
  9:3c77083deb4a
  10:429fcd26f52d
  18:d42e18c7bc9b
  $ hg log -q -r 'bisect(untested)'
  11:82ca6f06eccd
  12:9f259202bbe7
  13:b0a32c86eb31
  15:857b178a7cf3
  $ hg bisect -b      # -> update to rev 13
  Testing changeset 13:b0a32c86eb31 (3 changesets remaining, ~1 tests)
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg bisect -g
  The first good revision is:
  changeset:   13:b0a32c86eb31
  user:        test
  date:        Thu Jan 01 00:00:13 1970 +0000
  summary:     13
  
  $ hg log -q -r 'bisect(range)'
  1:4ca5088da217
  2:051e12f87bf1
  3:0950834f0a9c
  4:5c668c22234f
  5:385a529b6670
  6:a214d5d3811a
  8:dab8161ac8fc
  9:3c77083deb4a
  10:429fcd26f52d
  11:82ca6f06eccd
  12:9f259202bbe7
  13:b0a32c86eb31
  15:857b178a7cf3
  18:d42e18c7bc9b

complex bisect test 3

first bad rev is 15
10,9,13 are skipped an might be the first bad revisions as well

  $ hg bisect -r
  $ hg bisect -g 1
  $ hg bisect -b 16   # -> update to rev 6
  Testing changeset 6:a214d5d3811a (13 changesets remaining, ~3 tests)
  2 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ hg log -q -r 'bisect(pruned)'
  0:33b1f9bc8bc5
  1:4ca5088da217
  16:609d82a7ebae
  17:228c06deef46
  $ hg bisect -g      # -> update to rev 13
  Testing changeset 13:b0a32c86eb31 (8 changesets remaining, ~3 tests)
  3 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg bisect -s      # -> update to rev 10
  Testing changeset 10:429fcd26f52d (8 changesets remaining, ~3 tests)
  3 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg bisect -s      # -> update to rev 12
  Testing changeset 12:9f259202bbe7 (8 changesets remaining, ~3 tests)
  3 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg log -q -r 'bisect(pruned)'
  0:33b1f9bc8bc5
  1:4ca5088da217
  2:051e12f87bf1
  3:0950834f0a9c
  4:5c668c22234f
  5:385a529b6670
  6:a214d5d3811a
  10:429fcd26f52d
  13:b0a32c86eb31
  16:609d82a7ebae
  17:228c06deef46
  $ hg bisect -g      # -> update to rev 9
  Testing changeset 9:3c77083deb4a (5 changesets remaining, ~2 tests)
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg bisect -s      # -> update to rev 15
  Testing changeset 15:857b178a7cf3 (5 changesets remaining, ~2 tests)
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg log -q -r 'bisect(ignored)'
  $ hg bisect -b
  Due to skipped revisions, the first bad revision could be any of:
  changeset:   9:3c77083deb4a
  user:        test
  date:        Thu Jan 01 00:00:09 1970 +0000
  summary:     9
  
  changeset:   10:429fcd26f52d
  parent:      9:3c77083deb4a
  parent:      6:a214d5d3811a
  user:        test
  date:        Thu Jan 01 00:00:10 1970 +0000
  summary:     merge 6,9
  
  changeset:   13:b0a32c86eb31
  user:        test
  date:        Thu Jan 01 00:00:13 1970 +0000
  summary:     13
  
  changeset:   15:857b178a7cf3
  parent:      13:b0a32c86eb31
  parent:      10:429fcd26f52d
  user:        test
  date:        Thu Jan 01 00:00:15 1970 +0000
  summary:     merge 10,13
  
  $ hg log -q -r 'bisect(range)'
  1:4ca5088da217
  2:051e12f87bf1
  3:0950834f0a9c
  4:5c668c22234f
  5:385a529b6670
  6:a214d5d3811a
  8:dab8161ac8fc
  9:3c77083deb4a
  10:429fcd26f52d
  11:82ca6f06eccd
  12:9f259202bbe7
  13:b0a32c86eb31
  15:857b178a7cf3
  16:609d82a7ebae
  $ hg log -q -r 'bisect(ignored)'

complex bisect test 4

first good revision is 17
15,16 are skipped an might be the first good revisions as well

  $ hg bisect -r
  $ hg bisect -g 17
  $ hg bisect -b 8    # -> update to rev 10
  Testing changeset 13:b0a32c86eb31 (8 changesets remaining, ~3 tests)
  2 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg bisect -b      # -> update to rev 13
  Testing changeset 10:429fcd26f52d (5 changesets remaining, ~2 tests)
  3 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg bisect -b      # -> update to rev 15
  Testing changeset 15:857b178a7cf3 (3 changesets remaining, ~1 tests)
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg log -q -r 'bisect(pruned)'
  0:33b1f9bc8bc5
  1:4ca5088da217
  2:051e12f87bf1
  3:0950834f0a9c
  4:5c668c22234f
  5:385a529b6670
  6:a214d5d3811a
  8:dab8161ac8fc
  9:3c77083deb4a
  10:429fcd26f52d
  11:82ca6f06eccd
  12:9f259202bbe7
  13:b0a32c86eb31
  17:228c06deef46
  $ hg bisect -s      # -> update to rev 16
  Testing changeset 16:609d82a7ebae (3 changesets remaining, ~1 tests)
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg log -q -r 'bisect(pruned)'
  0:33b1f9bc8bc5
  1:4ca5088da217
  2:051e12f87bf1
  3:0950834f0a9c
  4:5c668c22234f
  5:385a529b6670
  6:a214d5d3811a
  8:dab8161ac8fc
  9:3c77083deb4a
  10:429fcd26f52d
  11:82ca6f06eccd
  12:9f259202bbe7
  13:b0a32c86eb31
  15:857b178a7cf3
  17:228c06deef46
  $ hg bisect -s
  Due to skipped revisions, the first good revision could be any of:
  changeset:   15:857b178a7cf3
  parent:      13:b0a32c86eb31
  parent:      10:429fcd26f52d
  user:        test
  date:        Thu Jan 01 00:00:15 1970 +0000
  summary:     merge 10,13
  
  changeset:   16:609d82a7ebae
  user:        test
  date:        Thu Jan 01 00:00:16 1970 +0000
  summary:     16
  
  changeset:   17:228c06deef46
  user:        test
  date:        Thu Jan 01 00:00:17 1970 +0000
  summary:     17
  
  $ hg log -q -r 'bisect(range)'
  8:dab8161ac8fc
  9:3c77083deb4a
  10:429fcd26f52d
  11:82ca6f06eccd
  12:9f259202bbe7
  13:b0a32c86eb31
  15:857b178a7cf3
  16:609d82a7ebae
  17:228c06deef46
  $ hg log -q -r 'bisect(pruned)'
  0:33b1f9bc8bc5
  1:4ca5088da217
  2:051e12f87bf1
  3:0950834f0a9c
  4:5c668c22234f
  5:385a529b6670
  6:a214d5d3811a
  8:dab8161ac8fc
  9:3c77083deb4a
  10:429fcd26f52d
  11:82ca6f06eccd
  12:9f259202bbe7
  13:b0a32c86eb31
  15:857b178a7cf3
  16:609d82a7ebae
  17:228c06deef46

test unrelated revs:

  $ hg bisect --reset
  $ hg bisect -b 7
  $ hg bisect -g 14
  abort: starting revisions are not directly related
  [255]
  $ hg log -q -r 'bisect(range)'
  $ hg log -q -r 'bisect(pruned)'
  0:33b1f9bc8bc5
  1:4ca5088da217
  2:051e12f87bf1
  3:0950834f0a9c
  4:5c668c22234f
  7:50c76098bbf2
  14:faa450606157
  $ hg bisect --reset

end at merge: 17 bad, 11 good (but 9 is first bad)

  $ hg bisect -r
  $ hg bisect -b 17
  $ hg bisect -g 11
  Testing changeset 13:b0a32c86eb31 (5 changesets remaining, ~2 tests)
  3 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg log -q -r 'bisect(ignored)'
  2:051e12f87bf1
  3:0950834f0a9c
  4:5c668c22234f
  5:385a529b6670
  6:a214d5d3811a
  9:3c77083deb4a
  10:429fcd26f52d
  $ hg bisect -g
  Testing changeset 15:857b178a7cf3 (3 changesets remaining, ~1 tests)
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg bisect -b
  The first bad revision is:
  changeset:   15:857b178a7cf3
  parent:      13:b0a32c86eb31
  parent:      10:429fcd26f52d
  user:        test
  date:        Thu Jan 01 00:00:15 1970 +0000
  summary:     merge 10,13
  
  Not all ancestors of this changeset have been checked.
  Use bisect --extend to continue the bisection from
  the common ancestor, dab8161ac8fc.
  $ hg log -q -r 'bisect(range)'
  11:82ca6f06eccd
  12:9f259202bbe7
  13:b0a32c86eb31
  15:857b178a7cf3
  16:609d82a7ebae
  17:228c06deef46
  $ hg log -q -r 'bisect(pruned)'
  0:33b1f9bc8bc5
  1:4ca5088da217
  8:dab8161ac8fc
  11:82ca6f06eccd
  12:9f259202bbe7
  13:b0a32c86eb31
  15:857b178a7cf3
  16:609d82a7ebae
  17:228c06deef46
  18:d42e18c7bc9b
  $ hg log -q -r 'bisect(untested)'
  $ hg log -q -r 'bisect(ignored)'
  2:051e12f87bf1
  3:0950834f0a9c
  4:5c668c22234f
  5:385a529b6670
  6:a214d5d3811a
  9:3c77083deb4a
  10:429fcd26f52d
  $ hg bisect --extend
  Extending search to changeset 8:dab8161ac8fc
  2 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ hg log -q -r 'bisect(untested)'
  $ hg log -q -r 'bisect(ignored)'
  2:051e12f87bf1
  3:0950834f0a9c
  4:5c668c22234f
  5:385a529b6670
  6:a214d5d3811a
  9:3c77083deb4a
  10:429fcd26f52d
  $ hg bisect -g # dab8161ac8fc
  Testing changeset 9:3c77083deb4a (3 changesets remaining, ~1 tests)
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg log -q -r 'bisect(untested)'
  9:3c77083deb4a
  10:429fcd26f52d
  $ hg log -q -r 'bisect(ignored)'
  2:051e12f87bf1
  3:0950834f0a9c
  4:5c668c22234f
  5:385a529b6670
  6:a214d5d3811a
  $ hg log -q -r 'bisect(goods)'
  0:33b1f9bc8bc5
  1:4ca5088da217
  8:dab8161ac8fc
  11:82ca6f06eccd
  12:9f259202bbe7
  13:b0a32c86eb31
  $ hg log -q -r 'bisect(bads)'
  15:857b178a7cf3
  16:609d82a7ebae
  17:228c06deef46
  18:d42e18c7bc9b
  $ hg bisect -b
  The first bad revision is:
  changeset:   9:3c77083deb4a
  user:        test
  date:        Thu Jan 01 00:00:09 1970 +0000
  summary:     9
  
  $ hg log -q -r 'bisect(range)'
  8:dab8161ac8fc
  9:3c77083deb4a
  10:429fcd26f52d
  11:82ca6f06eccd
  12:9f259202bbe7
  13:b0a32c86eb31
  15:857b178a7cf3
  16:609d82a7ebae
  17:228c06deef46
  $ hg log -q -r 'bisect(pruned)'
  0:33b1f9bc8bc5
  1:4ca5088da217
  8:dab8161ac8fc
  9:3c77083deb4a
  10:429fcd26f52d
  11:82ca6f06eccd
  12:9f259202bbe7
  13:b0a32c86eb31
  15:857b178a7cf3
  16:609d82a7ebae
  17:228c06deef46
  18:d42e18c7bc9b
  $ hg log -q -r 'bisect(untested)'
  $ hg log -q -r 'bisect(ignored)'
  2:051e12f87bf1
  3:0950834f0a9c
  4:5c668c22234f
  5:385a529b6670
  6:a214d5d3811a
  $ hg log -q -r 'bisect(goods)'
  0:33b1f9bc8bc5
  1:4ca5088da217
  8:dab8161ac8fc
  11:82ca6f06eccd
  12:9f259202bbe7
  13:b0a32c86eb31
  $ hg log -q -r 'bisect(bads)'
  9:3c77083deb4a
  10:429fcd26f52d
  15:857b178a7cf3
  16:609d82a7ebae
  17:228c06deef46
  18:d42e18c7bc9b

user adds irrelevant but consistent information (here: -g 2) to bisect state

  $ hg bisect -r
  $ hg bisect -b 13
  $ hg bisect -g 8
  Testing changeset 11:82ca6f06eccd (3 changesets remaining, ~1 tests)
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg log -q -r 'bisect(untested)'
  11:82ca6f06eccd
  12:9f259202bbe7
  $ hg bisect -g 2
  Testing changeset 11:82ca6f06eccd (3 changesets remaining, ~1 tests)
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg log -q -r 'bisect(untested)'
  11:82ca6f06eccd
  12:9f259202bbe7
  $ hg bisect -b
  The first bad revision is:
  changeset:   11:82ca6f06eccd
  parent:      8:dab8161ac8fc
  user:        test
  date:        Thu Jan 01 00:00:11 1970 +0000
  summary:     11
  
  $ hg log -q -r 'bisect(range)'
  8:dab8161ac8fc
  11:82ca6f06eccd
  12:9f259202bbe7
  13:b0a32c86eb31
  $ hg log -q -r 'bisect(pruned)'
  0:33b1f9bc8bc5
  1:4ca5088da217
  2:051e12f87bf1
  8:dab8161ac8fc
  11:82ca6f06eccd
  12:9f259202bbe7
  13:b0a32c86eb31
  14:faa450606157
  15:857b178a7cf3
  16:609d82a7ebae
  17:228c06deef46
  18:d42e18c7bc9b
  $ hg log -q -r 'bisect(untested)'