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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  $ hg init repo

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  $ cd repo

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  $ echo a > a

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  $ hg ci -Am t

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  adding a

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  $ hg mv a b

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  $ hg ci -Am t1

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  $ hg debugrename b

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  b renamed from a:b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3

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  $ hg mv b a

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  $ hg ci -Am t2

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  $ hg debugrename a

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  a renamed from b:37d9b5d994eab34eda9c16b195ace52c7b129980

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  $ hg debugrename --rev 1 b

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  b renamed from a:b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3

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