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Missing is used to find out the differences between the current branch and
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The performance analysis itself brings no further points than the
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incremental-push-pull one.
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More importantly, the UI have been considered not optimal: missing finds and
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displays the differences between two branches, presenting the revisions that
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are not common to both branches as two sets:
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* the revisions that are present only in the current branch,
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* the revisions that are present only in the other branch.
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A quick and dirty survey indicates that most of the users are interested in
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only one set of revisions at a time.
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From a performance point of view, it may be more appropriate to calculate only
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the set the user is asking for.
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It has been proposed that the missing command be deprecated in favor of a
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--dry-run option for the push, pull, merge commands.
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In the mean time, the missing command stays interesting as it provides an easy
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way to test, measure and optimize graph differences processing.