tags-cache: directly perform a monimal walk for hgtagsfnodescache warming
We do something narrower than the path retrieving data. So lets use dedicated
code instead.
This provides further useful speedup:
### data-env-vars.name = mozilla-try-2023-03-22-zstd-sparse-revlog
# benchmark.name = hg.debug.debug-update-cache
# bin-env-vars.hg.flavor = default
# bin-env-vars.hg.py-re2-module = default
# benchmark.variants.pre-state = warm
before-this-series: 19.947581
skip-fnode-filter: 18.916804 (-5.17%, -1.03)
use-rev-num: 17.493725 (-12.30%, -2.45)
this-changesets: 15.919466 (-20.19%, -4.03)
#require svn svn-bindings
$ cat >> $HGRCPATH <<EOF
> [extensions]
> convert =
> EOF
$ svnadmin create svn-repo
$ svnadmin load -q svn-repo < "$TESTDIR/svn/tags.svndump"
Convert
$ hg convert --datesort svn-repo A-hg
initializing destination A-hg repository
scanning source...
sorting...
converting...
5 init projA
4 adda
3 changea
2 changea2
1 changea3
0 changea
updating tags
$ cd A-hg
$ hg log -G --template '{rev} {desc|firstline} tags: {tags}\n'
o 6 update tags tags: tip
|
o 5 changea tags: trunk.goodtag
|
o 4 changea3 tags:
|
o 3 changea2 tags: trunk.v1
|
o 2 changea tags:
|
o 1 adda tags:
|
o 0 init projA tags:
$ hg tags -q
tip
trunk.goodtag
trunk.v1
$ cd ..
Convert without tags
$ hg convert --datesort --config convert.svn.tags= svn-repo A-notags-hg
initializing destination A-notags-hg repository
scanning source...
sorting...
converting...
5 init projA
4 adda
3 changea
2 changea2
1 changea3
0 changea
$ hg -R A-notags-hg tags -q
tip