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don't perform costly 'difference_update' on dependencies...
don't perform costly 'difference_update' on dependencies Scheduler: set1.difference_update(set2) can be very slow if set2 is large, even if set1 is empty, so use faster set1 = set1.difference(set2), and don't perform any difference operation on empty dependencies. The result was a dramatic reduction in throughput after the scheduler has routed many thousands of tasks, even with no task dependencies.
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iplogger
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#!/usr/bin/env python
# encoding: utf-8
#-----------------------------------------------------------------------------
# Copyright (C) 2008-2009 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
from IPython.parallel.apps.iploggerapp import launch_new_instance
launch_new_instance()