upstream/ipython Files · IPython/extensions/parallelmagic.py

Merge pull request from takluyver/import-performance...

Merge pull request from takluyver/import-performance Import performance Defer various imports for a small reduction in startup time. IPython.lib.__init__ previously loaded IPython.lib.inputhook to export some of its functions. This meant that importing anything from IPython.lib also loaded inputhook. For now, I've just removed that import, but that is an API change, because the functions are no longer accessible as e.g. IPython.lib.enable_qt4 Added a note about the API change. Timing command, borrowed from Openoffice to simulate cold start: $ sync ; echo 3 | sudo tee /proc/sys/vm/drop_caches; time ipython3 -c pass Results with this branch: 7.68, 7.64, 7.35, 7.38 s 'real' Results with master: 8.17, 8.04, 7.81, 7.77

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      # encoding: utf-8

      """

      =============

      parallelmagic

      =============

      Deprecated, parallel magics are no longer an extension.

      """

      #-----------------------------------------------------------------------------

      #  Copyright (C) 2008 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.

      #-----------------------------------------------------------------------------

      from warnings import warn

      def load_ipython_extension(ip):

          warn("Parallel Magics are no longer defined in an extension", DeprecationWarning)

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				# encoding: utf-8
				"""
				=============
				parallelmagic
				=============

				Deprecated, parallel magics are no longer an extension.
				"""

				#-----------------------------------------------------------------------------
				# Copyright (C) 2008 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.
				#-----------------------------------------------------------------------------

				from warnings import warn

				def load_ipython_extension(ip):
				warn("Parallel Magics are no longer defined in an extension", DeprecationWarning)