changelog: lazily parse description
Before, the description field was converted to a localstr at parse
time. With this patch, we store the raw description and convert to
a localstr when it is first accessed.
We see a revset speedup for revsets that don't access the description:
author(mpm)
0.896565
0.914234
0.869085
date(2015)
0.878797
0.891980
0.862525
extra(rebase_source)
0.865446
0.912514
0.871500
author(mpm) or author(greg)
1.801832
1.860402
1.791589
date(2015) or branch(default)
0.968276
0.994673
0.974027
author(mpm) or desc(bug) or date(2015) or extra(rebase_source)
3.656193
3.721032
3.643593
As you can see, most of these revsets are already faster than from
before this refactoring: we have already offset the performance
loss from the introduction of the new class representing parsed
changelog entries!
$ hg debugextensions
$ debugpath=`pwd`/extwithoutinfos.py
$ cat > extwithoutinfos.py <<EOF
> EOF
$ cat >> $HGRCPATH <<EOF
> [extensions]
> color=
> histedit=
> patchbomb=
> rebase=
> mq=
> ext1 = $debugpath
> EOF
$ hg debugextensions
color
ext1 (untested!)
histedit
mq
patchbomb
rebase
$ hg debugextensions -v
color
location: */hgext/color.pyc (glob)
tested with: internal
ext1
location: */extwithoutinfos.pyc (glob)
histedit
location: */hgext/histedit.pyc (glob)
tested with: internal
mq
location: */hgext/mq.pyc (glob)
tested with: internal
patchbomb
location: */hgext/patchbomb.pyc (glob)
tested with: internal
rebase
location: */hgext/rebase.pyc (glob)
tested with: internal
$ hg debugextensions -Tjson | sed 's|\\\\|/|g'
[
{
"buglink": "",
"name": "color",
"source": "*/hgext/color.pyc", (glob)
"testedwith": "internal"
},
{
"buglink": "",
"name": "ext1",
"source": "*/extwithoutinfos.pyc", (glob)
"testedwith": ""
},
{
"buglink": "",
"name": "histedit",
"source": "*/hgext/histedit.pyc", (glob)
"testedwith": "internal"
},
{
"buglink": "",
"name": "mq",
"source": "*/hgext/mq.pyc", (glob)
"testedwith": "internal"
},
{
"buglink": "",
"name": "patchbomb",
"source": "*/hgext/patchbomb.pyc", (glob)
"testedwith": "internal"
},
{
"buglink": "",
"name": "rebase",
"source": "*/hgext/rebase.pyc", (glob)
"testedwith": "internal"
}
]