Here's a WSGI middleware component for using pyconquer with any CherryPy app. It's a great way to find threading problems, as well as profile call times. PyConquer was built to resolve some concurrency issues while I was writing test_states.py, and really helped me untangle the interaction between request threads, the main thread, and (the old CP 2) autoreload.
class WSGILogger(object): """A WSGI middleware app which wraps 'nextapp' with pyconquer.""" def __init__(self, nextapp, path="pyconquer.log"): self.nextapp = nextapp self.path = path f = open(self.path, "wb") f.write("") f.close() def run(self, func, *args): """run(func, *args). Run func, dumping trace data into self.path.""" import pyconquer tr = pyconquer.Logger(events = ['call', 'return', 'exception', 'c_call', 'c_return', 'c_exception', ]) tr.out = open(self.path, "ab") tr.time_calls = True try: tr.start() return func(*args) finally: tr.stop() tr.out.close() def __call__(self, environ, start_response): # Wrap the request in a function so we get a "total time". def gather(): result =  for line in self.nextapp(environ, start_response): result.append(line) return result return self.run(gather)