.arcconfig

perftemplating: stop going through the log command

Only benchmark the rendering phase by moving steps outside of the timed
function:

* revisions resolution,
* template parsing

{
    "conduit_uri": "https://phab.mercurial-scm.org/api",
    "repository.callsign": "HG",
    "arc.land.onto.default": "@",
    "base": "hg:.^"
}