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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Mailbox module should use binary I/O, not text I/O","articleBody":"BPO | [9124](https://bugs.python.org/issue9124)\n--- | :---\nNosy | @birkenfeld, @rhettinger, @pitrou, @vstinner, @giampaolo, @regebro, @bitdancer\nFiles | \u003cli\u003e[test_thunderbird_mailbox.py](https://bugs.python.org/file17809/test_thunderbird_mailbox.py \"Uploaded as text/plain at 2010-06-30.12:28:20 by holdenweb\")\u003c/li\u003e\u003cli\u003e[test.mailbox](https://bugs.python.org/file17810/test.mailbox \"Uploaded as text/plain at 2010-06-30.12:29:27 by holdenweb\"): Test data for Thunderbird mailbox reader\u003c/li\u003e\u003cli\u003e[test2.5.out](https://bugs.python.org/file17811/test2.5.out \"Uploaded as text/plain at 2010-06-30.12:32:30 by holdenweb\"): 2.5 profiler output showing non-setup time is concentrated on mailbox itervalues\u003c/li\u003e\u003cli\u003e[test3.1.out](https://bugs.python.org/file17812/test3.1.out \"Uploaded as text/plain at 2010-06-30.12:34:57 by holdenweb\"): 3.1 profiler output showing that 1.3M+ calls to cp1252.decode use almost half the CPU\u003c/li\u003e\u003cli\u003e[mailbox.patch](https://bugs.python.org/file20522/mailbox.patch \"Uploaded as text/plain at 2011-01-26.00:58:46 by @vstinner\")\u003c/li\u003e\u003cli\u003e[BytesGenerator_handle_text.patch](https://bugs.python.org/file20530/BytesGenerator_handle_text.patch \"Uploaded as text/plain at 2011-01-26.10:00:29 by @vstinner\")\u003c/li\u003e\u003cli\u003e[mailbox2.patch](https://bugs.python.org/file20532/mailbox2.patch \"Uploaded as text/plain at 2011-01-26.14:21:12 by @pitrou\")\u003c/li\u003e\u003cli\u003e[mailbox3.2.patch](https://bugs.python.org/file20585/mailbox3.2.patch \"Uploaded as text/plain at 2011-01-28.21:23:37 by @bitdancer\")\u003c/li\u003e\u003cli\u003e[mailbox4.patch](https://bugs.python.org/file20606/mailbox4.patch \"Uploaded as text/plain at 2011-01-29.17:25:45 by @bitdancer\")\u003c/li\u003e\u003cli\u003e[mailbox5.patch](https://bugs.python.org/file20608/mailbox5.patch \"Uploaded as text/plain at 2011-01-29.19:24:39 by @bitdancer\")\u003c/li\u003e\u003cli\u003e[mailbox6.patch](https://bugs.python.org/file20614/mailbox6.patch \"Uploaded as text/plain at 2011-01-29.21:56:15 by @bitdancer\")\u003c/li\u003e\n\n\u003csup\u003e*Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.*\u003c/sup\u003e\n\n\u003cdetails\u003e\u003csummary\u003eShow more details\u003c/summary\u003e\u003cp\u003e\n\nGitHub fields:\n```python\nassignee = 'https://github.com/bitdancer'\nclosed_at = \u003cDate 2011-01-30.06:23:56.626\u003e\ncreated_at = \u003cDate 2010-06-30.12:28:21.574\u003e\nlabels = ['type-bug', 'library', 'release-blocker']\ntitle = 'Mailbox module should use binary I/O, not text I/O'\nupdated_at = \u003cDate 2011-01-30.06:23:56.625\u003e\nuser = 'https://bugs.python.org/holdenweb'\n```\n\nbugs.python.org fields:\n```python\nactivity = \u003cDate 2011-01-30.06:23:56.625\u003e\nactor = 'r.david.murray'\nassignee = 'r.david.murray'\nclosed = True\nclosed_date = \u003cDate 2011-01-30.06:23:56.626\u003e\ncloser = 'r.david.murray'\ncomponents = ['Library (Lib)']\ncreation = \u003cDate 2010-06-30.12:28:21.574\u003e\ncreator = 'holdenweb'\ndependencies = []\nfiles = ['17809', '17810', '17811', '17812', '20522', '20530', '20532', '20585', '20606', '20608', '20614']\nhgrepos = []\nissue_num = 9124\nkeywords = ['patch']\nmessage_count = 46.0\nmessages = ['108978', '108979', '126078', '126079', '126082', '126085', '126139', '126144', '126153', '126994', '127002', '127005', '127036', '127078', '127079', '127087', '127089', '127097', '127101', '127104', '127119', '127135', '127148', '127168', '127245', '127303', '127305', '127309', '127310', '127313', '127324', '127327', '127338', '127343', '127346', '127349', '127354', '127392', '127395', '127406', '127418', '127446', '127459', '127472', '127491', '127518']\nnosy_count = 9.0\nnosy_names = ['georg.brandl', 'rhettinger', 'holdenweb', 'pitrou', 'vstinner', 'giampaolo.rodola', 'lregebro', 'r.david.murray', 'sdaoden']\npr_nums = []\npriority = 'release blocker'\nresolution = 'fixed'\nstage = 'resolved'\nstatus = 'closed'\nsuperseder = None\ntype = 'behavior'\nurl = 'https://bugs.python.org/issue9124'\nversions = ['Python 3.2']\n```\n\n\u003c/p\u003e\u003c/details\u003e\n","author":{"url":"https://github.com/holdenweb","@type":"Person","name":"holdenweb"},"datePublished":"2010-06-30T12:28:22.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":47},"url":"https://github.com/53370/cpython/issues/53370"}