diff -r 1817f8946c22 -r faf279e33298 cubicweb/pyramid/profile.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cubicweb/pyramid/profile.py	Mon Sep 26 14:52:12 2016 +0200
@@ -0,0 +1,63 @@
+""" Tools for profiling.
+
+See :ref:`profiling`."""
+from __future__ import print_function
+
+import cProfile
+import itertools
+
+from pyramid.view import view_config
+
+
+@view_config(route_name='profile_ping')
+def ping(request):
+    """ View that handle '/_profile/ping'
+
+    It simply reply 'ping', without requiring connection to the repository.
+    It is a useful as a comparison point to evaluate the actual overhead of
+    more costly views.
+    """
+    request.response.text = u'pong'
+    return request.response
+
+
+@view_config(route_name='profile_cnx')
+def cnx(request):
+    """ View that handle '/_profile/cnx'
+
+    Same as :func:`ping`, but it first ask for a connection to the repository.
+    Useful to evaluate the overhead of opening a connection.
+    """
+    request.cw_cnx
+    request.response.text = u'pong'
+    return request.response
+
+
+def wsgi_profile(app, filename='program.prof', dump_every=50):
+    """ A WSGI middleware for profiling
+
+    It enable the profiler before passing the request to the underlying
+    application, and disable it just after.
+
+    The stats will be dumped after ``dump_every`` requests
+
+    :param filename: The filename to dump the stats to.
+    :param dump_every: Number of requests after which to dump the stats.
+    """
+
+    profile = cProfile.Profile()
+
+    counter = itertools.count(1)
+
+    def application(environ, start_response):
+        profile.enable()
+        try:
+            return app(environ, start_response)
+        finally:
+            profile.disable()
+            if not counter.next() % dump_every:
+                print("Dump profile stats to %s" % filename)
+                profile.create_stats()
+                profile.dump_stats(filename)
+
+    return application