tags-cache: skip the filternode step if we are not going to use it
When warming the hgtagsfnodescache, we don't need the actual result, so we can
simply skip the part that "filter" fnode we read from the cache. So provide a
quite visible speed up to the top level `hg debugupdatecache` function.
### 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: 19.947581
after: 18.916804 (-5.17%, -1.03)
#require svn svn-bindings
$ cat >> $HGRCPATH <<EOF
> [extensions]
> convert =
> EOF
$ convert()
> {
> startrev=$1
> repopath=A-r$startrev-hg
> hg convert --config convert.svn.startrev=$startrev \
> --config convert.svn.trunk=branches/branch1 \
> --config convert.svn.branches=" " \
> --config convert.svn.tags= \
> --datesort svn-repo $repopath
> hg -R $repopath log -G \
> --template '{rev} {desc|firstline} files: {files}\n'
> echo
> }
$ svnadmin create svn-repo
$ svnadmin load -q svn-repo < "$TESTDIR/svn/startrev.svndump"
Convert before branching point
$ convert 3
initializing destination A-r3-hg repository
scanning source...
sorting...
converting...
3 removeb
2 changeaa
1 branch, changeaaa
0 addc,changeaaaa
o 3 addc,changeaaaa files: a c
|
o 2 branch, changeaaa files: a
|
o 1 changeaa files: a
|
o 0 removeb files: a
Convert before branching point
$ convert 4
initializing destination A-r4-hg repository
scanning source...
sorting...
converting...
2 changeaa
1 branch, changeaaa
0 addc,changeaaaa
o 2 addc,changeaaaa files: a c
|
o 1 branch, changeaaa files: a
|
o 0 changeaa files: a
Convert at branching point
$ convert 5
initializing destination A-r5-hg repository
scanning source...
sorting...
converting...
1 branch, changeaaa
0 addc,changeaaaa
o 1 addc,changeaaaa files: a c
|
o 0 branch, changeaaa files: a
Convert last revision only
$ convert 6
initializing destination A-r6-hg repository
scanning source...
sorting...
converting...
0 addc,changeaaaa
o 0 addc,changeaaaa files: a c