[Bug 4191] New: Complicated revset I use in my "where am I now" log alias is twice as slow as 2.9.1 with tip

[mercurial-bugs at selenic.com]

http://bz.selenic.com/show_bug.cgi?id=4191

          Priority: normal
            Bug ID: 4191
                CC: mercurial-devel at selenic.com
          Assignee: bugzilla at selenic.com
           Summary: Complicated revset I use in my "where am I now" log
                    alias is twice as slow as 2.9.1 with tip
          Severity: bug
    Classification: Unclassified
                OS: Mac OS
          Reporter: durin42 at gmail.com
          Hardware: PC
            Status: UNCONFIRMED
           Version: unspecified
         Component: Mercurial
           Product: Mercurial

Transcript below. revset in question is "sort((::. or bookmark() or
heads(public())), "-rev")"

Note that it's *much* worse if the upstream() revset from remotebranches is
used instead of public(): the tip-performance is in the neighborhood of 30
seconds with upstream(), although the results are the same. I'll figure that
out on my own if needed.

augie% HGRCPATH=wat ./hg --version
Mercurial Distributed SCM (version 2.9.1)
(see http://mercurial.selenic.com for more information)

Copyright (C) 2005-2014 Matt Mackall and others
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

augie% HGRCPATH=null ./hg --time log --graph --style compact --limit 6 -r
'sort((::. or bookmark() or heads(public())), "-rev")' > /dev/null
obsolete feature not enabled but 20612 markers found!
time: real 0.770 secs (user 0.730+0.000 sys 0.040+0.000)

augie% HGRCPATH=wat hg --version 
Mercurial Distributed SCM (version 2.9.1+31-e811b93f2cb1+20140307)
(see http://mercurial.selenic.com for more information)

Copyright (C) 2005-2014 Matt Mackall and others
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

augie% HGRCPATH=null hg --time log --graph --style compact --limit 6 -r
'sort((::. or bookmark() or heads(public())), "-rev")' > /dev/null 
obsolete feature not enabled but 20612 markers found!
time: real 1.800 secs (user 1.740+0.000 sys 0.050+0.000)

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