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.

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#!/usr/bin/env python3

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import errno

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import os

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import sys

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for f in sys.argv[1:]:

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    try:

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        print(f, '->', os.readlink(f))

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    except OSError as err:

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        if err.errno != errno.EINVAL:

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            raise

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        print(f, '->', f, 'not a symlink')

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sys.exit(0)