urllib2 works slowly with proxy on windows

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BPO	29533
Nosy	@pfmoore, @orsenthil, @tjguk, @schlamar, @zware, @eryksun, @zooba, @juliadolgova
PRs	python/cpython#247
Files	checklib.py: just make a call to urllib2.urlopen("https://docs.python.org") socket.py: not a patched lib. Has debug lines near 141 line. Use it with checklib.py. test.py: compares performance of gethostbyaddr with gethostbyname_ex log.txt: result of test.py on my computer (Windows 8, 64 bit) socket.patch: not actual (wrong) patch compare_ie_urllib.txt request.patch checklib-py3.py: make a request to http://python.org/ via proxy using urllib compare_urllib_progs.png

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2017-02-11.08:43:27.110>
labels = ['3.8', '3.9', '3.10', 'performance', 'library', 'OS-windows']
title = 'urllib2 works slowly with proxy on windows'
updated_at = <Date 2021-03-05.13:23:25.513>
user = 'https://github.com/juliadolgova'

bugs.python.org fields:

activity = <Date 2021-03-05.13:23:25.513>
actor = 'eryksun'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)', 'Windows']
creation = <Date 2017-02-11.08:43:27.110>
creator = 'juliadolgova'
dependencies = []
files = ['46628', '46629', '46630', '46631', '46632', '46649', '46661', '46766', '46813']
hgrepos = []
issue_num = 29533
keywords = ['patch']
message_count = 23.0
messages = ['287597', '287905', '287944', '287945', '287976', '288071', '288118', '288139', '288172', '288179', '288413', '290482', '290807', '290833', '290841', '290884', '291222', '291223', '291823', '291884', '291953', '291964', '291972']
nosy_count = 8.0
nosy_names = ['paul.moore', 'orsenthil', 'tim.golden', 'schlamar', 'zach.ware', 'eryksun', 'steve.dower', 'juliadolgova']
pr_nums = ['247']
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'performance'
url = 'https://bugs.python.org/issue29533'
versions = ['Python 3.8', 'Python 3.9', 'Python 3.10']

首先使用 checklib-py3.py 重現 Windows 代理請求，並將其耗時與 test.py 和隨附的效能結果進行比較。閱讀 request.patch 和 socket.py 的註記，然後查看 PR #247 了解先前的工作。完成時應包括針對所回報的 urllib 代理效能下降問題的已達成共識的修正方案以及效能驗證，但該 issue 未定義精確的驗收測試。

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urllib2 works slowly with proxy on windows

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