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 no-windows
$ . "$TESTDIR/remotefilelog-library.sh"
$ hg init master
$ cd master
$ cat >> .hg/hgrc <<EOF
> [remotefilelog]
> server=True
> EOF
$ echo x > x
$ hg commit -qAm x
$ cd ..
$ hgcloneshallow ssh://user@dummy/master shallow -q
1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
$ cd shallow
$ cat >> $TESTTMP/get_file_linknode.py <<EOF
> from mercurial import node, registrar, scmutil
> cmdtable = {}
> command = registrar.command(cmdtable)
> @command(b'debug-file-linknode', [(b'r', b'rev', b'.', b'rev')], b'hg debug-file-linknode FILE')
> def debug_file_linknode(ui, repo, file, **opts):
> rflctx = scmutil.revsingle(repo.unfiltered(), opts['rev']).filectx(file)
> ui.status(b'%s\n' % node.hex(rflctx.ancestormap()[rflctx._filenode][2]))
> EOF
$ cat >> .hg/hgrc <<EOF
> [ui]
> interactive=1
> [extensions]
> strip=
> get_file_linknode=$TESTTMP/get_file_linknode.py
> [experimental]
> evolution=createmarkers,allowunstable
> EOF
$ echo a > a
$ hg commit -qAm msg1
$ hg commit --amend 're:^$' -m msg2
$ hg commit --amend 're:^$' -m msg3
$ hg --hidden log -G -T '{rev} {node|short}'
@ 3 df91f74b871e
|
| x 2 70494d7ec5ef
|/
| x 1 1e423846dde0
|/
o 0 b292c1e3311f
$ hg debug-file-linknode -r 70494d a
df91f74b871e064c89afa1fe9e2f66afa2c125df
$ hg --hidden strip -r 1 3
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
saved backup bundle to $TESTTMP/shallow/.hg/strip-backup/df91f74b871e-c94d67be-backup.hg
$ hg --hidden log -G -T '{rev} {node|short}'
o 1 70494d7ec5ef
|
@ 0 b292c1e3311f
Demonstrate that the linknode points to a commit that is actually in the repo
after the strip operation. Otherwise remotefilelog has to search every commit in
the repository looking for a valid linkrev every time it's queried, such as
during push.
$ hg debug-file-linknode -r 70494d a
70494d7ec5ef6cd3cd6939a9fd2812f9956bf553