phases: stop using `repo.set` in `remotephasessummary` The `repository.set` create changectx on the fly, an expensive operation. Using `repo.revs` and a direct rev-num → node-id translation will be significantly faster. This is especially true as we prepare ourself to no longer do the rev-num → node-id transalation there. The speedup is a bit lost in the overall noisyness of the slow phase discovery algorithm, but it save a small amount of time in my benchmark.

     1

{

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    "conduit_uri": "https://phab.mercurial-scm.org/api",

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    "phabricator.uri": "https://phab.mercurial-scm.org/",

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    "repository.callsign": "HG",

     5

    "arc.land.onto.default": "@",

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    "base": "hg:.^"

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}