tests/test-patchbomb-bookmark.t

treemanifests: remove _loadalllazy in _diff()

The benchmarks below use a similar setup as in ee7ee0c516ca and my other recent
commits.  Yes, in some cases this runs in literally 5% of the time it
previously took.

before = a6f8ab53

    diff --git:
    repo  | N | T | before (mean +- stdev) | after (mean +- stdev) | % of before
    ------+---+---+------------------------+-----------------------+------------
    m-u   |   |   | 1.301 s +-  0.004 s    | 1.309 s +-  0.012 s   | 100.6%
    m-u   |   | x | 1.303 s +-  0.009 s    | 1.302 s +-  0.006 s   |  99.9%
    m-u   | x |   | 1.308 s +-  0.006 s    | 1.309 s +-  0.007 s   | 100.1%
    m-u   | x | x | 85.7 ms +-   0.6 ms    | 86.0 ms +-   0.3 ms   | 100.4%
    l-d-r |   |   | 197.5 ms +-   0.7 ms   | 197.8 ms +-   2.2 ms  | 100.2%
    l-d-r |   | x | 199.4 ms +-   0.6 ms   | 199.3 ms +-   0.9 ms  |  99.9%
    l-d-r | x |   | 86.1 ms +-   0.5 ms    | 85.8 ms +-   0.9 ms   |  99.7%
    l-d-r | x | x | 64.4 ms +-   0.4 ms    | 64.4 ms +-   0.3 ms   | 100.0%

    diff -c . --git:
    repo  | N | T | before (mean +- stdev) | after (mean +- stdev) | % of before
    ------+---+---+------------------------+-----------------------+------------
    m-u   |   |   | 236.7 ms +-   1.1 ms   | 236.5 ms +-   1.3 ms  |  99.9%
    m-u   |   | x | 158.7 ms +-   1.0 ms   | 128.0 ms +-   1.0 ms  |  80.7% <--
    m-u   | x |   | 239.7 ms +-   1.8 ms   | 238.1 ms +-   1.5 ms  |  99.3%
    m-u   | x | x | 132.4 ms +-   0.9 ms   | 132.3 ms +-   0.6 ms  |  99.9%
    l-d-r |   |   | 81.8 ms +-   0.4 ms    | 81.8 ms +-   0.3 ms   | 100.0%
    l-d-r |   | x | 3.894 s +-  0.017 s    | 193.6 ms +-   0.4 ms  |   5.0% <--
    l-d-r | x |   | 106.9 ms +-   0.4 ms   | 106.6 ms +-   0.3 ms  |  99.7%
    l-d-r | x | x | 182.7 ms +-   0.8 ms   | 183.3 ms +-   0.9 ms  | 100.3%

    rebase -r . --keep -d .^^:
    repo  | N | T | before (mean +- stdev) | after (mean +- stdev) | % of before
    ------+---+---+------------------------+-----------------------+------------
    m-u   |   |   | 5.615 s +-  0.109 s    | 5.562 s +-  0.015 s   |  99.1%
    m-u   |   | x | 5.701 s +-  0.027 s    | 5.715 s +-  0.023 s   | 100.2%
    m-u   | x |   | 5.572 s +-  0.128 s    | 5.613 s +-  0.182 s   | 100.7%
    m-u   | x | x | 633.3 ms +-  28.7 ms   | 636.2 ms +-  13.8 ms  | 100.5%
    l-d-r |   |   | 666.4 ms +-  17.0 ms   | 658.5 ms +-   9.3 ms  |  98.8%
    l-d-r |   | x | 6.520 s +-  0.070 s    | 6.505 s +-  0.026 s   |  99.8%
    l-d-r | x |   | 279.0 ms +-  13.0 ms   | 276.5 ms +-   4.7 ms  |  99.1%
    l-d-r | x | x | 1.636 s +-  0.058 s    | 1.657 s +-  0.014 s   | 101.3%

    status --change . --copies:
    repo  | N | T | before (mean +- stdev) | after (mean +- stdev) | % of before
    ------+---+---+------------------------+-----------------------+------------
    m-u   |   |   | 218.6 ms +-   1.4 ms   | 217.9 ms +-   1.5 ms  |  99.7%
    m-u   |   | x | 138.5 ms +-   0.4 ms   | 108.4 ms +-   0.2 ms  |  78.3% <--
    m-u   | x |   | 220.1 ms +-   1.3 ms   | 219.7 ms +-   1.5 ms  |  99.8%
    m-u   | x | x | 113.2 ms +-   0.4 ms   | 112.4 ms +-   0.8 ms  |  99.3%
    l-d-r |   |   | 80.2 ms +-   0.3 ms    | 80.6 ms +-   0.6 ms   | 100.5%
    l-d-r |   | x | 3.899 s +-  0.020 s    | 194.8 ms +-   4.0 ms  |   5.0% <--
    l-d-r | x |   | 83.4 ms +-   0.8 ms    | 83.2 ms +-   0.2 ms   |  99.8%
    l-d-r | x | x | 732.2 ms +-   4.3 ms   | 194.9 ms +-   1.0 ms  |  26.6% <--

    status --copies:
    repo  | N | T | before (mean +- stdev) | after (mean +- stdev) | % of before
    ------+---+---+------------------------+-----------------------+------------
    m-u   |   |   | 1.917 s +-  0.005 s    | 1.914 s +-  0.004 s   |  99.8%
    m-u   |   | x | 1.909 s +-  0.012 s    | 1.934 s +-  0.004 s   | 101.3%
    m-u   | x |   | 1.915 s +-  0.005 s    | 1.904 s +-  0.004 s   |  99.4%
    m-u   | x | x | 94.8 ms +-   0.3 ms    | 94.7 ms +-   0.2 ms   |  99.9%
    l-d-r |   |   | 593.9 ms +-   1.2 ms   | 594.6 ms +-   9.4 ms  | 100.1%
    l-d-r |   | x | 595.2 ms +-   3.8 ms   | 597.2 ms +-   2.6 ms  | 100.3%
    l-d-r | x |   | 182.5 ms +-   1.6 ms   | 182.1 ms +-   0.6 ms  |  99.8%
    l-d-r | x | x | 149.6 ms +-   0.9 ms   | 149.1 ms +-   0.8 ms  |  99.7%

    update $rev^; ~/src/hg/hg{hg}/hg update $rev:
    repo  | N | T | before (mean +- stdev) | after (mean +- stdev) | % of before
    ------+---+---+------------------------+-----------------------+------------
    m-u   |   |   | 3.121 s +-  0.007 s    | 3.129 s +-  0.012 s   | 100.3%
    m-u   |   | x | 2.972 s +-  0.011 s    | 2.981 s +-  0.012 s   | 100.3%
    m-u   | x |   | 3.144 s +-  0.014 s    | 3.141 s +-  0.011 s   |  99.9%
    m-u   | x | x | 312.2 ms +-   2.4 ms   | 312.3 ms +-   2.1 ms  | 100.0%
    l-d-r |   |   | 444.4 ms +-   4.3 ms   | 446.9 ms +-   5.3 ms  | 100.6%
    l-d-r |   | x | 9.159 s +-  0.069 s    | 9.182 s +-  0.040 s   | 100.3%
    l-d-r | x |   | 254.6 ms +-   1.6 ms   | 255.2 ms +-   1.6 ms  | 100.2%
    l-d-r | x | x | 1.525 s +-  0.007 s    | 1.577 s +-  0.007 s   | 103.4% <--?

Differential Revision: https://phab.mercurial-scm.org/D4845

Create @ bookmark as main reference

  $ hg init repo
  $ cd repo
  $ echo "[extensions]" >> $HGRCPATH
  $ echo "patchbomb=" >> $HGRCPATH
  $ hg book @

Create a dummy revision that must never be exported

  $ echo no > no
  $ hg ci -Amno -d '6 0'
  adding no

Create a feature and use -B

  $ hg book booktest
  $ echo first > a
  $ hg ci -Amfirst -d '7 0'
  adding a
  $ echo second > b
  $ hg ci -Amsecond -d '8 0'
  adding b
  $ hg email --date '1981-1-1 0:1' -n -t foo -s bookmark -B booktest
  From [test]: test
  this patch series consists of 2 patches.
  
  
  Write the introductory message for the patch series.
  
  Cc: 
  
  displaying [PATCH 0 of 2] bookmark ...
  MIME-Version: 1.0
  Content-Type: text/plain; charset="us-ascii"
  Content-Transfer-Encoding: 7bit
  Subject: [PATCH 0 of 2] bookmark
  Message-Id: <patchbomb.347155260@test-hostname>
  User-Agent: Mercurial-patchbomb/* (glob)
  Date: Thu, 01 Jan 1981 00:01:00 +0000
  From: test
  To: foo
  
  
  displaying [PATCH 1 of 2] first ...
  MIME-Version: 1.0
  Content-Type: text/plain; charset="us-ascii"
  Content-Transfer-Encoding: 7bit
  Subject: [PATCH 1 of 2] first
  X-Mercurial-Node: accde9b8b6dce861c185d0825c1affc09a79cb26
  X-Mercurial-Series-Index: 1
  X-Mercurial-Series-Total: 2
  Message-Id: <accde9b8b6dce861c185.347155261@test-hostname>
  X-Mercurial-Series-Id: <accde9b8b6dce861c185.347155261@test-hostname>
  In-Reply-To: <patchbomb.347155260@test-hostname>
  References: <patchbomb.347155260@test-hostname>
  User-Agent: Mercurial-patchbomb/* (glob)
  Date: Thu, 01 Jan 1981 00:01:01 +0000
  From: test
  To: foo
  
  # HG changeset patch
  # User test
  # Date 7 0
  #      Thu Jan 01 00:00:07 1970 +0000
  # Node ID accde9b8b6dce861c185d0825c1affc09a79cb26
  # Parent  043bd3889e5aaf7d88fe3713cf425f782ad2fb71
  first
  
  diff -r 043bd3889e5a -r accde9b8b6dc a
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/a	Thu Jan 01 00:00:07 1970 +0000
  @@ -0,0 +1,1 @@
  +first
  
  displaying [PATCH 2 of 2] second ...
  MIME-Version: 1.0
  Content-Type: text/plain; charset="us-ascii"
  Content-Transfer-Encoding: 7bit
  Subject: [PATCH 2 of 2] second
  X-Mercurial-Node: 417defd1559c396ba06a44dce8dc1c2d2d653f3f
  X-Mercurial-Series-Index: 2
  X-Mercurial-Series-Total: 2
  Message-Id: <417defd1559c396ba06a.347155262@test-hostname>
  X-Mercurial-Series-Id: <accde9b8b6dce861c185.347155261@test-hostname>
  In-Reply-To: <patchbomb.347155260@test-hostname>
  References: <patchbomb.347155260@test-hostname>
  User-Agent: Mercurial-patchbomb/* (glob)
  Date: Thu, 01 Jan 1981 00:01:02 +0000
  From: test
  To: foo
  
  # HG changeset patch
  # User test
  # Date 8 0
  #      Thu Jan 01 00:00:08 1970 +0000
  # Node ID 417defd1559c396ba06a44dce8dc1c2d2d653f3f
  # Parent  accde9b8b6dce861c185d0825c1affc09a79cb26
  second
  
  diff -r accde9b8b6dc -r 417defd1559c b
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/b	Thu Jan 01 00:00:08 1970 +0000
  @@ -0,0 +1,1 @@
  +second
  
Do the same and combine with -o only one must be exported

  $ cd ..
  $ hg clone repo repo2
  updating to bookmark @
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd repo
  $ hg up @
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  (activating bookmark @)
  $ hg book outgoing
  $ echo 1 > x
  $ hg ci -Am1 -d '8 0'
  adding x
  created new head
  $ hg push ../repo2 -B outgoing
  pushing to ../repo2
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  exporting bookmark outgoing
  $ echo 2 > y
  $ hg ci -Am2 -d '9 0'
  adding y
  $ hg email --date '1982-1-1 0:1' -n -t foo -s bookmark -B outgoing -o ../repo2
  comparing with ../repo2
  From [test]: test
  this patch series consists of 1 patches.
  
  Cc: 
  
  displaying [PATCH] bookmark ...
  MIME-Version: 1.0
  Content-Type: text/plain; charset="us-ascii"
  Content-Transfer-Encoding: 7bit
  Subject: [PATCH] bookmark
  X-Mercurial-Node: 8dab2639fd35f1e337ad866c372a5c44f1064e3c
  X-Mercurial-Series-Index: 1
  X-Mercurial-Series-Total: 1
  Message-Id: <8dab2639fd35f1e337ad.378691260@test-hostname>
  X-Mercurial-Series-Id: <8dab2639fd35f1e337ad.378691260@test-hostname>
  User-Agent: Mercurial-patchbomb/* (glob)
  Date: Fri, 01 Jan 1982 00:01:00 +0000
  From: test
  To: foo
  
  # HG changeset patch
  # User test
  # Date 9 0
  #      Thu Jan 01 00:00:09 1970 +0000
  # Node ID 8dab2639fd35f1e337ad866c372a5c44f1064e3c
  # Parent  0b24b8316483bf30bfc3e4d4168e922b169dbe66
  2
  
  diff -r 0b24b8316483 -r 8dab2639fd35 y
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/y	Thu Jan 01 00:00:09 1970 +0000
  @@ -0,0 +1,1 @@
  +2