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 no-msys # MSYS will translate web paths as if they were file paths
This tests if CGI files from after d0db3462d568 but
before d74fc8dec2b4 still work.
$ hg init test
$ cat >hgweb.cgi <<HGWEB
> #!$PYTHON
> #
> # An example CGI script to use hgweb, edit as necessary
>
> from mercurial import demandimport; demandimport.enable()
> from mercurial.hgweb import hgweb
> from mercurial.hgweb import wsgicgi
> from mercurial.hgweb.request import wsgiapplication
>
> def make_web_app():
> return hgweb(b"test", b"Empty test repository")
>
> wsgicgi.launch(wsgiapplication(make_web_app))
> HGWEB
$ chmod 755 hgweb.cgi
$ cat >hgweb.config <<HGWEBDIRCONF
> [paths]
> test = test
> HGWEBDIRCONF
$ cat >hgwebdir.cgi <<HGWEBDIR
> #!$PYTHON
> #
> # An example CGI script to export multiple hgweb repos, edit as necessary
>
> from mercurial import demandimport; demandimport.enable()
> from mercurial.hgweb import hgwebdir
> from mercurial.hgweb import wsgicgi
> from mercurial.hgweb.request import wsgiapplication
>
> def make_web_app():
> return hgwebdir(b"hgweb.config")
>
> wsgicgi.launch(wsgiapplication(make_web_app))
> HGWEBDIR
$ chmod 755 hgwebdir.cgi
$ . "$TESTDIR/cgienv"
$ "$PYTHON" hgweb.cgi > page1
$ "$PYTHON" hgwebdir.cgi > page2
$ PATH_INFO="/test/"
$ PATH_TRANSLATED="/var/something/test.cgi"
$ REQUEST_URI="/test/test/"
$ SCRIPT_URI="http://hg.omnifarious.org/test/test/"
$ SCRIPT_URL="/test/test/"
$ "$PYTHON" hgwebdir.cgi > page3
$ grep -i error page1 page2 page3
[1]