JezK
Edit File: stats.py
"""Statistics analyzer for HotShot.""" try: import profile import pstats except ImportError, e: raise ImportError, str(e) + '; please install the python-profiler package' import hotshot.log from hotshot.log import ENTER, EXIT def load(filename): return StatsLoader(filename).load() class StatsLoader: def __init__(self, logfn): self._logfn = logfn self._code = {} self._stack = [] self.pop_frame = self._stack.pop def load(self): # The timer selected by the profiler should never be used, so make # sure it doesn't work: p = Profile() p.get_time = _brokentimer log = hotshot.log.LogReader(self._logfn) taccum = 0 for event in log: what, (filename, lineno, funcname), tdelta = event if tdelta > 0: taccum += tdelta # We multiply taccum to convert from the microseconds we # have to the seconds that the profile/pstats module work # with; this allows the numbers to have some basis in # reality (ignoring calibration issues for now). if what == ENTER: frame = self.new_frame(filename, lineno, funcname) p.trace_dispatch_call(frame, taccum * .000001) taccum = 0 elif what == EXIT: frame = self.pop_frame() p.trace_dispatch_return(frame, taccum * .000001) taccum = 0 # no further work for line events assert not self._stack return pstats.Stats(p) def new_frame(self, *args): # args must be filename, firstlineno, funcname # our code objects are cached since we don't need to create # new ones every time try: code = self._code[args] except KeyError: code = FakeCode(*args) self._code[args] = code # frame objects are create fresh, since the back pointer will # vary considerably if self._stack: back = self._stack[-1] else: back = None frame = FakeFrame(code, back) self._stack.append(frame) return frame class Profile(profile.Profile): def simulate_cmd_complete(self): pass class FakeCode: def __init__(self, filename, firstlineno, funcname): self.co_filename = filename self.co_firstlineno = firstlineno self.co_name = self.__name__ = funcname class FakeFrame: def __init__(self, code, back): self.f_back = back self.f_code = code def _brokentimer(): raise RuntimeError, "this timer should not be called"