{"id":174397,"date":"2022-04-17T09:03:51","date_gmt":"2022-04-17T01:03:51","guid":{"rendered":"http:\/\/www.idc.net\/help\/174397\/"},"modified":"2022-04-17T09:03:51","modified_gmt":"2022-04-17T01:03:51","slug":"%e5%90%8e%e6%b5%aa%e4%ba%91python%e6%95%99%e7%a8%8b%ef%bc%9apython%e5%a4%9a%e8%bf%9b%e7%a8%8b%e5%8f%96%e4%bb%a3%e5%a4%9a%e7%ba%bf%e7%a8%8b%e7%9a%84%e6%8e%a2%e7%a9%b6","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/174397\/","title":{"rendered":"\u540e\u6d6a\u4e91Python\u6559\u7a0b\uff1apython\u591a\u8fdb\u7a0b\u53d6\u4ee3\u591a\u7ebf\u7a0b\u7684\u63a2\u7a76"},"content":{"rendered":"

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1\u3001\u8bf4\u660e<\/strong><\/p>\n

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\u6240\u4ee5GIL\u6ca1\u6709\u4efb\u4f55\u95ee\u9898\u3002Python\u63d0\u4f9b\u4e86\u4e00\u4e2amultiprocessing\u6a21\u5757\uff0c\u4f7f\u6211\u4eec\u53ef\u4ee5\u5f88\u5bb9\u6613\u5730\u521b\u5efa\u6d41\u7a0b\u3002<\/p>\n

2\u3001\u5b9e\u4f8b<\/strong><\/p>\n

import time\nfrom multiprocessing import Pool\nCOUNT = 10000000\nstart = time.clock()\ndef countdown(n):\n    while n > 0:\n        n -= 1\n \npool = Pool(processes=2)\nstart = time.clock()\nr1 = pool.apply_async(countdown, [COUNT\/\/2])\nr2 = pool.apply_async(countdown, [COUNT\/\/2])\npool.close()\npool.join()\nprint('Time used:', time.clock() - start)\n# ('Time used:', 0.0017779999999998353)<\/pre>\n
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<\/strong><\/p>\n
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