Mercurial > hg
view mercurial/lsprofcalltree.py @ 38162:bdf344aea0ee
extensions: peek command table of disabled extensions without importing
With chg where demandimport disabled, and if disk cache not warm, it took
more than 5 seconds to get "unknown command" error when you typo a command
name. This is horrible UX.
The new implementation is less accurate than the original one as Python
can do anything at import time and cmdtable may be imported from another
module, but I think it's good enough.
Note that the new implementation has to parse .py files, which is slightly
slower than executing .pyc if demandimport is enabled.
author | Yuya Nishihara <yuya@tcha.org> |
---|---|
date | Thu, 03 May 2018 18:38:02 +0900 |
parents | 5a988b3c9645 |
children | 1ae0faa14797 |
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""" lsprofcalltree.py - lsprof output which is readable by kcachegrind Authors: * David Allouche <david <at> allouche.net> * Jp Calderone & Itamar Shtull-Trauring * Johan Dahlin This software may be used and distributed according to the terms of the GNU General Public License, incorporated herein by reference. """ from __future__ import absolute_import, print_function def label(code): if isinstance(code, str): return '~' + code # built-in functions ('~' sorts at the end) else: return '%s %s:%d' % (code.co_name, code.co_filename, code.co_firstlineno) class KCacheGrind(object): def __init__(self, profiler): self.data = profiler.getstats() self.out_file = None def output(self, out_file): self.out_file = out_file print('events: Ticks', file=out_file) self._print_summary() for entry in self.data: self._entry(entry) def _print_summary(self): max_cost = 0 for entry in self.data: totaltime = int(entry.totaltime * 1000) max_cost = max(max_cost, totaltime) print('summary: %d' % max_cost, file=self.out_file) def _entry(self, entry): out_file = self.out_file code = entry.code if isinstance(code, str): print('fi=~', file=out_file) else: print('fi=%s' % code.co_filename, file=out_file) print('fn=%s' % label(code), file=out_file) inlinetime = int(entry.inlinetime * 1000) if isinstance(code, str): print('0 ', inlinetime, file=out_file) else: print('%d %d' % (code.co_firstlineno, inlinetime), file=out_file) # recursive calls are counted in entry.calls if entry.calls: calls = entry.calls else: calls = [] if isinstance(code, str): lineno = 0 else: lineno = code.co_firstlineno for subentry in calls: self._subentry(lineno, subentry) print(file=out_file) def _subentry(self, lineno, subentry): out_file = self.out_file code = subentry.code print('cfn=%s' % label(code), file=out_file) if isinstance(code, str): print('cfi=~', file=out_file) print('calls=%d 0' % subentry.callcount, file=out_file) else: print('cfi=%s' % code.co_filename, file=out_file) print('calls=%d %d' % ( subentry.callcount, code.co_firstlineno), file=out_file) totaltime = int(subentry.totaltime * 1000) print('%d %d' % (lineno, totaltime), file=out_file)