author | Laurent Peuch <cortex@worlddomination.be> |
Thu, 19 Dec 2019 06:35:54 +0100 | |
changeset 12833 | c69421aece24 |
parent 12567 | 26744ad37953 |
permissions | -rw-r--r-- |
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# copyright 2017 LOGILAB S.A. (Paris, FRANCE), all rights reserved. |
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# copyright 2014-2016 UNLISH S.A.S. (Montpellier, FRANCE), all rights reserved. |
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# |
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr |
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# |
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# This file is part of CubicWeb. |
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# |
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# CubicWeb is free software: you can redistribute it and/or modify it under the |
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# terms of the GNU Lesser General Public License as published by the Free |
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# Software Foundation, either version 2.1 of the License, or (at your option) |
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# any later version. |
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# |
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT |
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more |
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# details. |
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# |
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# You should have received a copy of the GNU Lesser General Public License along |
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# with CubicWeb. If not, see <http://www.gnu.org/licenses/>. |
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""" Tools for profiling. |
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See :ref:`profiling`.""" |
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import cProfile |
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import itertools |
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from pyramid.view import view_config |
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@view_config(route_name='profile_ping') |
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def ping(request): |
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""" View that handle '/_profile/ping' |
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It simply reply 'ping', without requiring connection to the repository. |
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It is a useful as a comparison point to evaluate the actual overhead of |
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more costly views. |
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""" |
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request.response.text = u'pong' |
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return request.response |
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@view_config(route_name='profile_cnx') |
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def cnx(request): |
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""" View that handle '/_profile/cnx' |
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Same as :func:`ping`, but it first ask for a connection to the repository. |
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Useful to evaluate the overhead of opening a connection. |
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""" |
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request.cw_cnx |
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request.response.text = u'pong' |
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return request.response |
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def wsgi_profile(app, filename='program.prof', dump_every=50): |
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""" A WSGI middleware for profiling |
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It enable the profiler before passing the request to the underlying |
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application, and disable it just after. |
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The stats will be dumped after ``dump_every`` requests |
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:param filename: The filename to dump the stats to. |
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:param dump_every: Number of requests after which to dump the stats. |
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""" |
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profile = cProfile.Profile() |
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counter = itertools.count(1) |
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def application(environ, start_response): |
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profile.enable() |
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try: |
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return app(environ, start_response) |
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finally: |
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profile.disable() |
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if not counter.next() % dump_every: |
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print("Dump profile stats to %s" % filename) |
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profile.create_stats() |
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profile.dump_stats(filename) |
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return application |