view tests/test-convert-cvs-branch.t @ 51576:de5bf3fe0233

revset: stop serializing node when using "%ln"

Turning hundred of thousand of node from node to hex and back can be slow… what
about we stop doing it?

In many case were we are using node id we should be using revision id. However
this is not a good reason to have a stupidly slow implementation of "%ln".

This caught my attention again because the phase discovery during push make an
extensive use of "%ln" or huge set. In absolute, that phase discovery probably
should use "%ld" and need to improves its algorithmic complexity, but improving
"%ln" seems simple and long overdue. This greatly speeds up `hg push` on
repository with many drafts.

Here are some relevant poulpe benchmarks:

### data-env-vars.name                             = mozilla-try-2023-03-22-zstd-sparse-revlog
  # benchmark.name                                 = hg.command.push
  # bin-env-vars.hg.flavor                         = default
  # bin-env-vars.hg.py-re2-module                  = default
  # benchmark.variants.explicit-rev                = all-out-heads
  # benchmark.variants.issue6528                   = disabled
  # benchmark.variants.protocol                    = ssh
  # benchmark.variants.reuse-external-delta-parent = default

 ## benchmark.variants.revs                        = any-1-extra-rev
before: 44.235070
after:  20.416329 (-53.85%, -23.82)
 ## benchmark.variants.revs                        = any-100-extra-rev
before: 49.234697
after:  26.519829 (-46.14%, -22.71)



### benchmark.name                = hg.command.bundle
  # bin-env-vars.hg.flavor        = default
  # bin-env-vars.hg.py-re2-module = default
  # benchmark.variants.revs       = all
  # benchmark.variants.type       = none-streamv2
 ## data-env-vars.name            = heptapod-public-2024-03-25-zstd-sparse-revlog
before:  10.138396
after:    7.750458  (-23.55%, -2.39)
 ## data-env-vars.name            = mercurial-public-2024-03-22-zstd-sparse-revlog
before:   1.263859
after:    0.700229  (-44.60%, -0.56)
 ## data-env-vars.name            = mozilla-try-2023-03-22-zstd-sparse-revlog
before: 399.484481
after:  346.5089 (-13.26%, -52.98)
 ## data-env-vars.name            = pypy-2024-03-22-zstd-sparse-revlog
before:   4.540080
after:    3.401700  (-25.07%, -1.14)
 ## data-env-vars.name            = tryton-public-2024-03-22-zstd-sparse-revlog
before:   2.975765
after:    1.870798  (-37.13%, -1.10)

#require cvs no-root

This is https://bz.mercurial-scm.org/1148
and https://bz.mercurial-scm.org/1447

  $ cvscall()
  > {
  >     cvs -f "$@" > /dev/null
  > }
  $ cat <<EOF >> $HGRCPATH
  > [extensions]
  > convert =
  > [convert]
  > cvsps.cache = 0
  > EOF

create cvs repository

  $ mkdir cvsrepo
  $ cd cvsrepo
  $ CVSROOT=`pwd`
  $ export CVSROOT
  $ CVS_OPTIONS=-f
  $ export CVS_OPTIONS
  $ cd ..
  $ rmdir cvsrepo
  $ cvscall -q -d "$CVSROOT" init

Create a new project

  $ mkdir src
  $ cd src
  $ echo "1" > a
  $ echo "1" > b
  $ cvscall import -m "init" src v0 r0 | sort
  $ cd ..
  $ cvscall co src
  cvs checkout: Updating src
  $ cd src

Branch the project

  $ cvscall tag -b BRANCH
  cvs tag: Tagging .
  $ cvscall up -r BRANCH > /dev/null
  cvs update: Updating .

Modify file a, then b, then a

  $ sleep 1
  $ echo "2" > a
  $ cvscall ci -m "mod a"
  cvs commit: Examining .
  $ echo "2" > b
  $ cvscall ci -m "mod b"
  cvs commit: Examining .
  $ sleep 1
  $ echo "3" > a
  $ cvscall ci -m "mod a again"
  cvs commit: Examining .

Convert

  $ cd ..
  $ hg convert src
  assuming destination src-hg
  initializing destination src-hg repository
  connecting to $TESTTMP/cvsrepo
  scanning source...
  collecting CVS rlog
  7 log entries
  creating changesets
  5 changeset entries
  sorting...
  converting...
  4 Initial revision
  3 init
  2 mod a
  1 mod b
  0 mod a again
  updating tags

Check the result

  $ hg -R src-hg log -G --template '{rev} ({branches}) {desc} files: {files}\n'
  o  5 () update tags files: .hgtags
  |
  | o  4 (BRANCH) mod a again files: a
  | |
  | o  3 (BRANCH) mod b files: b
  | |
  | o  2 (BRANCH) mod a files: a
  | |
  | o  1 (v0) init files:
  |/
  o  0 () Initial revision files: a b
  


issue 1447

  $ cvscall()
  > {
  >     cvs -f "$@" > /dev/null
  >     sleep 1
  > }
  $ cvsci()
  > {
  >     cvs -f ci "$@" >/dev/null
  >     sleep 1
  > }
  $ cvscall -Q -d `pwd`/cvsmaster2 init
  $ cd cvsmaster2
  $ CVSROOT=`pwd`
  $ export CVSROOT
  $ mkdir foo
  $ cd ..
  $ cvscall -Q co -d cvswork2 foo
  $ cd cvswork2
  $ echo foo > a.txt
  $ echo bar > b.txt
  $ cvscall -Q add a.txt b.txt
  $ cvsci -m "Initial commit"
  cvs commit: Examining .
  $ echo foo > b.txt
  $ cvsci -m "Fix b on HEAD"
  cvs commit: Examining .
  $ echo bar > a.txt
  $ cvsci -m "Small fix in a on HEAD"
  cvs commit: Examining .
  $ cvscall -Q tag -b BRANCH
  $ cvscall -Q up -P -rBRANCH
  $ echo baz > b.txt
  $ cvsci -m "Change on BRANCH in b"
  cvs commit: Examining .
  $ hg debugcvsps -x --parents foo
  collecting CVS rlog
  5 log entries
  creating changesets
  4 changeset entries
  ---------------------
  PatchSet 1 
  Date: * (glob)
  Author: * (glob)
  Branch: HEAD
  Tag: (none) 
  Log:
  Initial commit
  
  Members: 
  	a.txt:INITIAL->1.1 
  	b.txt:INITIAL->1.1 
  
  ---------------------
  PatchSet 2 
  Date: * (glob)
  Author: * (glob)
  Branch: HEAD
  Tag: (none) 
  Branchpoints: BRANCH 
  Parent: 1
  Log:
  Fix b on HEAD
  
  Members: 
  	b.txt:1.1->1.2 
  
  ---------------------
  PatchSet 3 
  Date: * (glob)
  Author: * (glob)
  Branch: HEAD
  Tag: (none) 
  Branchpoints: BRANCH 
  Parent: 2
  Log:
  Small fix in a on HEAD
  
  Members: 
  	a.txt:1.1->1.2 
  
  ---------------------
  PatchSet 4 
  Date: * (glob)
  Author: * (glob)
  Branch: BRANCH
  Tag: (none) 
  Parent: 3
  Log:
  Change on BRANCH in b
  
  Members: 
  	b.txt:1.2->1.2.2.1 
  

  $ cd ..