add profiling option to server configuration

docs/CONFIGURATION.rst

@@ -91,7 +91,7 @@ purge-after
 Server
 ------
 
-HTTP server configuration, does **not** apply to uWSGI.
+HTTP server configuration, does **not** apply to uWSGI (except for `profile`).
 
 .. code-block:: ini
 
@@ -99,6 +99,7 @@ HTTP server configuration, does **not** apply to uWSGI.
     host = localhost
     port = 8080
     reload = off
+    profile = off
 
 host
     listen on specified interface
@@ -110,6 +111,10 @@ reload
     reload application, when the source code has changed. Useful for
     development (don't forget to use a fixed `session-key`).
 
+profile
+    show 10 most time consuming function in Isso after each request. Do
+    not use in production.
+
 
 SMTP
 ----

isso/__init__.py

@@ -162,7 +162,11 @@ def make_app(conf=None):
     else:
         logger.warn("unable to connect to HTTP server")
 
-    app = ProxyFix(wsgi.SubURI(SharedDataMiddleware(isso.wsgi_app, {
+    if isso.conf.getboolean("server", "profile"):
+        from werkzeug.contrib.profiler import ProfilerMiddleware
+        isso = ProfilerMiddleware(isso, sort_by=("cumtime", ), restrictions=("isso/(?!lib)", ))
+
+    app = ProxyFix(wsgi.SubURI(SharedDataMiddleware(isso, {
         '/js': join(dirname(__file__), 'js/'),
         '/css': join(dirname(__file__), 'css/')
         })))

isso/core.py

@@ -92,7 +92,8 @@ class Config:
         "enabled = false",
         "purge-after = 30d",
         "[server]",
-        "host = localhost", "port = 8080", "reload = off",
+        "host = localhost", "port = 8080",
+        "reload = off", "profile = off",
         "[smtp]",
         "username = ", "password = ",
         "host = localhost", "port = 465", "ssl = on",