Mercurial > hg
view tests/filterpyflakes.py @ 29787:80df04266a16
hgweb: profile HTTP requests
Currently, running `hg serve --profile` doesn't yield anything useful:
when the process is terminated the profiling output displays results
from the main thread, which typically spends most of its time in
select.select(). Furthermore, it has no meaningful results from
mercurial.* modules because the threads serving HTTP requests don't
actually get profiled.
This patch teaches the hgweb wsgi applications to profile individual
requests. If profiling is enabled, the profiler kicks in after
HTTP/WSGI environment processing but before Mercurial's main request
processing.
The profile results are printed to the configured profiling output.
If running `hg serve` from a shell, they will be printed to stderr,
just before the HTTP request line is logged. If profiling to a file,
we only write a single profile to the file because the file is not
opened in append mode. We could add support for appending to files
in a future patch if someone wants it.
Per request profiling doesn't work with the statprof profiler because
internally that profiler collects samples from the thread that
*initially* requested profiling be enabled. I have plans to address
this by vendoring Facebook's customized statprof and then improving
it.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Sun, 14 Aug 2016 18:37:24 -0700 |
parents | cf339d6ac7c7 |
children | 046a7e828ea6 |
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#!/usr/bin/env python # Filter output by pyflakes to control which warnings we check from __future__ import absolute_import, print_function import re import sys def makekey(typeandline): """ for sorting lines by: msgtype, path/to/file, lineno, message typeandline is a sequence of a message type and the entire message line the message line format is path/to/file:line: message >>> makekey((3, 'example.py:36: any message')) (3, 'example.py', 36, ' any message') >>> makekey((7, 'path/to/file.py:68: dummy message')) (7, 'path/to/file.py', 68, ' dummy message') >>> makekey((2, 'fn:88: m')) > makekey((2, 'fn:9: m')) True """ msgtype, line = typeandline fname, line, message = line.split(":", 2) # line as int for ordering 9 before 88 return msgtype, fname, int(line), message lines = [] for line in sys.stdin: # We whitelist tests (see more messages in pyflakes.messages) pats = [ (r"imported but unused", None), (r"local variable '.*' is assigned to but never used", None), (r"unable to detect undefined names", None), (r"undefined name '.*'", r"undefined name '(WindowsError|memoryview)'") ] for msgtype, (pat, excl) in enumerate(pats): if re.search(pat, line) and (not excl or not re.search(excl, line)): break # pattern matches else: continue # no pattern matched, next line fn = line.split(':', 1)[0] f = open(fn) data = f.read() f.close() if 'no-' 'check-code' in data: continue lines.append((msgtype, line)) for msgtype, line in sorted(lines, key=makekey): sys.stdout.write(line) print() # self test of "undefined name" detection for other than 'memoryview' if False: print(undefinedname)