contrib/vim/HGAnnotate.vim

performance: speedup computation of obsolete revisions

In their current state, revset calls can be very costly as we test
predicates on the entire repository. As obsolete computation is used
by the "hidden" filter, it needs to be very fast.

This changet drops the revset call in favor of direct testing of
the phase of a changeset.

Performance test on my Mercurial checkout

- 19857 total changesets,
- 1584 obsolete changesets,
- 13310 obsolescence markers.

Before:
  ! obsolete
  ! wall 0.047041

After:
  ! obsolete
  ! wall 0.004590


Performance test on a Mozilla central checkout:

- 117293 total changesets,
- 1 obsolete changeset,
- 1 obsolescence marker.

Before:
  ! obsolete
  ! wall 0.001539

After:
  ! obsolete
  ! wall 0.000017

" $Id: CVSAnnotate.vim,v 1.5 2002/10/01 21:34:02 rhiestan Exp $
" Vim syntax file
" Language:	CVS annotate output
" Maintainer:	Bob Hiestand <[e-mail]>
" Last Change:	$Date: 2002/10/01 21:34:02 $
" Remark:	Used by the cvscommand plugin.  Originally written by Mathieu
" Clabaut
if version < 600
  syntax clear
elseif exists("b:current_syntax")
  finish
endif

syn match cvsDate 	/\S\S\S \S\+ \d\+ \d\+:\d\+:\d\+ \d\+ [+-]\?\d\+/ contained
syn match cvsName  	/^\s*\S\+ / 		contained nextgroup=cvsVer
syn match cvsVer 	/\d\+ / 		contained nextgroup=cvsDate
syn region cvsHead 	start="^" end=":" 	contains=cvsVer,cvsName,cvsDate

if !exists("did_cvsannotate_syntax_inits")
let did_cvsannotate_syntax_inits = 1
hi link cvsText 	String
hi link cvsDate 	Comment
hi link cvsName	Type
hi link cvsVer	Statement
endif

let b:current_syntax="CVSAnnotate"