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# Copyright (C) 2006 by Canonical Ltd
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# Written by John Arbash Meinel <john@arbash-meinel.com>
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""A custom importer and regex compiler which logs time spent."""
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def stack_add(name, frame_name, frame_lineno, scope_name=None):
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"""Start a new record on the stack"""
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this_stack = (_cur_id, name)
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_total_stack[_parent_stack[-1]].append(this_stack)
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_total_stack[this_stack] = []
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_parent_stack.append(this_stack)
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_info[this_stack] = [len(_parent_stack)-1, frame_name, frame_lineno, scope_name]
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def stack_finish(this, cost):
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"""Finish a given entry, and record its cost in time"""
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assert _parent_stack[-1] == this, \
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'import stack does not end with this %s: %s' % (this, _parent_stack)
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_info[this].append(cost)
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def log_stack_info(out_file, sorted=True, hide_fast=True):
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# Find all of the roots with import = 0
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out_file.write(' cum inline name\t\t\t\t\t\tframe\n')
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todo = [(value[-1], key) for key,value in _info.iteritems() if value[0] == 0]
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cum_time, cur = todo.pop()
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children = _total_stack[cur]
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if hide_fast and info[-1] < 0.0001:
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# Compute the module time by removing the children times
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for child in children:
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mod_time -= c_info[-1]
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c_times.append((c_info[-1], child))
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# indent, cum_time, mod_time, name,
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# scope_name, frame_name, frame_lineno
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out_file.write('%5.1f %5.1f %s %-35s\t@ %s:%d\n'
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% (info[-1]*1000., mod_time*1000., '+'*info[0],
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cur[1][:40], info[1], info[2]))
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_real_import = __import__
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def timed_import(name, globals, locals, fromlist):
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"""Wrap around standard importer to log import time"""
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scope_name = globals.get('__name__', None)
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if scope_name is None:
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scope_name = globals.get('__file__', None)
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if scope_name is None:
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scope_name = globals.keys()
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# Trim out paths before bzrlib
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loc = scope_name.find('bzrlib')
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scope_name = scope_name[loc:]
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# For stdlib, trim out early paths
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loc = scope_name.find('python2.4')
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scope_name = scope_name[loc:]
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# Figure out the frame that is doing the importing
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frame = sys._getframe(1)
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frame_name = frame.f_globals.get('__name__', '<unknown>')
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if frame_name.endswith('demandload'):
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# If this was demandloaded, we have 3 frames to ignore
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extra = ' (demandload)'
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frame = sys._getframe(4)
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frame_name = frame.f_globals.get('__name__', '<unknown>')
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frame_lineno = frame.f_lineno
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this = stack_add(name+extra, frame_name, frame_lineno, scope_name)
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mod = _real_import(name, globals, locals, fromlist)
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tload = time.time()-tstart
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stack_finish(this, tload)
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_real_compile = sre._compile
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def timed_compile(*args, **kwargs):
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"""Log how long it takes to compile a regex"""
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# And who is requesting this?
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frame = sys._getframe(2)
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frame_name = frame.f_globals.get('__name__', '<unknown>')
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frame_lineno = frame.f_lineno
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this = stack_add(repr(args[0]), frame_name, frame_lineno)
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# Measure the compile time
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comp = _real_compile(*args, **kwargs)
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tcompile = time.time() - tstart
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stack_finish(this, tcompile)
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"""Install the hooks for measuring import and regex compile time."""
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__builtins__['__import__'] = timed_import
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sre._compile = timed_compile
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"""Remove the import and regex compile timing hooks."""
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__builtins__['__import__'] = _real_import
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sre._compile = _real_compile
added
removed
profile_imports.py
