phases: avoid a potentially costly dictionary interation in some case If we retract for the draft phase, there is not non-public item to be retracted and we can skip this part. This part is was apparently super costly thanks to Python. On mozilla-try-2019-02-18, a perf::unbundle call with a 10 000 changesets bundle gives give use the following timing. e57d4b868a3e: 4.6 seconds ac1c75188440: 102.5 seconds this-changeset: 30.0 seconds So we recovered about ⅔ of the regression, the next changeset will give us the rest back.

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# __init__.py - Startup and module loading logic for Mercurial.

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#

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# Copyright 2015 Gregory Szorc <gregory.szorc@gmail.com>

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#

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# This software may be used and distributed according to the terms of the

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# GNU General Public License version 2 or any later version.

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# Allow 'from mercurial import demandimport' to keep working.

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import hgdemandimport

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demandimport = hgdemandimport