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authorrahulp132020-03-17 14:55:41 +0530
committerrahulp132020-03-17 14:55:41 +0530
commit296443137f4288cb030e92859ccfbe3204bc1088 (patch)
treeca4798c2da1e7244edc3bc108d81b462b537aea2 /lib/python2.7/cProfile.py
parent0db48f6533517ecebfd9f0693f89deca28408b76 (diff)
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+#!/usr/bin/env python2
+
+"""Python interface for the 'lsprof' profiler.
+ Compatible with the 'profile' module.
+"""
+
+__all__ = ["run", "runctx", "help", "Profile"]
+
+import _lsprof
+
+# ____________________________________________________________
+# Simple interface
+
+def run(statement, filename=None, sort=-1):
+ """Run statement under profiler optionally saving results in filename
+
+ This function takes a single argument that can be passed to the
+ "exec" statement, and an optional file name. In all cases this
+ routine attempts to "exec" its first argument and gather profiling
+ statistics from the execution. If no file name is present, then this
+ function automatically prints a simple profiling report, sorted by the
+ standard name string (file/line/function-name) that is presented in
+ each line.
+ """
+ prof = Profile()
+ result = None
+ try:
+ try:
+ prof = prof.run(statement)
+ except SystemExit:
+ pass
+ finally:
+ if filename is not None:
+ prof.dump_stats(filename)
+ else:
+ result = prof.print_stats(sort)
+ return result
+
+def runctx(statement, globals, locals, filename=None, sort=-1):
+ """Run statement under profiler, supplying your own globals and locals,
+ optionally saving results in filename.
+
+ statement and filename have the same semantics as profile.run
+ """
+ prof = Profile()
+ result = None
+ try:
+ try:
+ prof = prof.runctx(statement, globals, locals)
+ except SystemExit:
+ pass
+ finally:
+ if filename is not None:
+ prof.dump_stats(filename)
+ else:
+ result = prof.print_stats(sort)
+ return result
+
+# Backwards compatibility.
+def help():
+ print "Documentation for the profile/cProfile modules can be found "
+ print "in the Python Library Reference, section 'The Python Profiler'."
+
+# ____________________________________________________________
+
+class Profile(_lsprof.Profiler):
+ """Profile(custom_timer=None, time_unit=None, subcalls=True, builtins=True)
+
+ Builds a profiler object using the specified timer function.
+ The default timer is a fast built-in one based on real time.
+ For custom timer functions returning integers, time_unit can
+ be a float specifying a scale (i.e. how long each integer unit
+ is, in seconds).
+ """
+
+ # Most of the functionality is in the base class.
+ # This subclass only adds convenient and backward-compatible methods.
+
+ def print_stats(self, sort=-1):
+ import pstats
+ pstats.Stats(self).strip_dirs().sort_stats(sort).print_stats()
+
+ def dump_stats(self, file):
+ import marshal
+ f = open(file, 'wb')
+ self.create_stats()
+ marshal.dump(self.stats, f)
+ f.close()
+
+ def create_stats(self):
+ self.disable()
+ self.snapshot_stats()
+
+ def snapshot_stats(self):
+ entries = self.getstats()
+ self.stats = {}
+ callersdicts = {}
+ # call information
+ for entry in entries:
+ func = label(entry.code)
+ nc = entry.callcount # ncalls column of pstats (before '/')
+ cc = nc - entry.reccallcount # ncalls column of pstats (after '/')
+ tt = entry.inlinetime # tottime column of pstats
+ ct = entry.totaltime # cumtime column of pstats
+ callers = {}
+ callersdicts[id(entry.code)] = callers
+ self.stats[func] = cc, nc, tt, ct, callers
+ # subcall information
+ for entry in entries:
+ if entry.calls:
+ func = label(entry.code)
+ for subentry in entry.calls:
+ try:
+ callers = callersdicts[id(subentry.code)]
+ except KeyError:
+ continue
+ nc = subentry.callcount
+ cc = nc - subentry.reccallcount
+ tt = subentry.inlinetime
+ ct = subentry.totaltime
+ if func in callers:
+ prev = callers[func]
+ nc += prev[0]
+ cc += prev[1]
+ tt += prev[2]
+ ct += prev[3]
+ callers[func] = nc, cc, tt, ct
+
+ # The following two methods can be called by clients to use
+ # a profiler to profile a statement, given as a string.
+
+ def run(self, cmd):
+ import __main__
+ dict = __main__.__dict__
+ return self.runctx(cmd, dict, dict)
+
+ def runctx(self, cmd, globals, locals):
+ self.enable()
+ try:
+ exec cmd in globals, locals
+ finally:
+ self.disable()
+ return self
+
+ # This method is more useful to profile a single function call.
+ def runcall(self, func, *args, **kw):
+ self.enable()
+ try:
+ return func(*args, **kw)
+ finally:
+ self.disable()
+
+# ____________________________________________________________
+
+def label(code):
+ if isinstance(code, str):
+ return ('~', 0, code) # built-in functions ('~' sorts at the end)
+ else:
+ return (code.co_filename, code.co_firstlineno, code.co_name)
+
+# ____________________________________________________________
+
+def main():
+ import os, sys
+ from optparse import OptionParser
+ usage = "cProfile.py [-o output_file_path] [-s sort] scriptfile [arg] ..."
+ parser = OptionParser(usage=usage)
+ parser.allow_interspersed_args = False
+ parser.add_option('-o', '--outfile', dest="outfile",
+ help="Save stats to <outfile>", default=None)
+ parser.add_option('-s', '--sort', dest="sort",
+ help="Sort order when printing to stdout, based on pstats.Stats class",
+ default=-1)
+
+ if not sys.argv[1:]:
+ parser.print_usage()
+ sys.exit(2)
+
+ (options, args) = parser.parse_args()
+ sys.argv[:] = args
+
+ if len(args) > 0:
+ progname = args[0]
+ sys.path.insert(0, os.path.dirname(progname))
+ with open(progname, 'rb') as fp:
+ code = compile(fp.read(), progname, 'exec')
+ globs = {
+ '__file__': progname,
+ '__name__': '__main__',
+ '__package__': None,
+ }
+ runctx(code, globs, None, options.outfile, options.sort)
+ else:
+ parser.print_usage()
+ return parser
+
+# When invoked as main program, invoke the profiler on a script
+if __name__ == '__main__':
+ main()