{"id":1465,"date":"2023-01-06T00:03:39","date_gmt":"2023-01-05T16:03:39","guid":{"rendered":"http:\/\/175.24.184.226\/?p=1465"},"modified":"2023-01-06T00:03:39","modified_gmt":"2023-01-05T16:03:39","slug":"python-%e8%bf%9b%e7%a8%8b-%e7%ba%bf%e7%a8%8b%e6%b1%a0","status":"publish","type":"post","link":"\/?p=1465","title":{"rendered":"python \u8fdb\u7a0b\/\u7ebf\u7a0b\u6c60"},"content":{"rendered":"

1.\u7ebf\u7a0b\u548c\u8fdb\u7a0b<\/h2>\n

\u8fdb\u7a0b<\/strong>\u53ea\u662f\u5360\u5185\u5b58<\/strong><\/p>\n

\u7ebf\u7a0b<\/strong>\u624d\u6d88\u8017CPU<\/strong><\/p>\n

2.\u5168\u5c40\u89e3\u91ca\u5668\u9501GIL<\/h2>\n

GIL\u662f\u89e3\u91ca\u5668\u7528\u4e8e\u540c\u6b65\u7ebf\u7a0b\u7684\u4e00\u79cd\u673a\u5236<\/p>\n

\u5b83\u4f7f\u5f97\u4efb\u4f55\u65f6\u523b\u4ec5\u6709\u4e00\u4e2a\u7ebf\u7a0b\u5728\u6267\u884c\uff08\u5c31\u7b97\u4f60\u662f\u591a\u6838\u5904\u7406\u5668\u4e5f\u4e00\u6837\uff09<\/p>\n

\u4f7f\u7528GIL\u7684\u89e3\u91ca\u5668\u53ea\u5141\u8bb8\u540c\u4e00\u65f6\u95f4\u6267\u884c\u4e00\u4e2a\u7ebf\u7a0b<\/p>\n

\u5e38\u89c1\u7684\u4f7f\u7528GIL\u89e3\u91ca\u5668\u6709CPython<\/code>\u3001Ruby MRI<\/code><\/p>\n

\u5982\u679c\u4f7f\u7528JPython<\/code>\u5c31\u6ca1\u6709GIL\u9501<\/p>\n

3.\u591a\u7ebf\u7a0b\u6d4b\u8bd5CPU\u5bc6\u96c6\u578b<\/h2>\n
import time\nfrom concurrent.futures import ThreadPoolExecutor, ProcessPoolExecutor\n#CPU \u88f8\u5954\ndef start():\n    """\u5355\u7eaf\u8ba1\u7b97  \u6d88\u8017CPU\u8d44\u6e90  \u6ca1\u6709\u5b9e\u9645\u610f\u4e49"""\n    data = 0\n    for _ in range(1000000):\n        data += 1\n    return\n\ndef single_task():\n    """\u5355\u7ebf\u7a0b\u8fd0\u884c"""\n    # \u7a0b\u5e8f\u542f\u52a8\u65f6\u95f4\n    time_data = time.time()\n    # \u6267\u884c10\u6b21\n    for _ in range(10):\n        start()\n    # \u6253\u5370\u7a0b\u5e8f\u6d88\u8017\u65f6\u95f4\n    single_consume_time = time.time() - time_data\n    print("\u5355\u7ebf\u7a0b\u8017\u65f6\uff1a", single_consume_time)\n    return single_consume_time\ndef multithread_task():\n    """\u591a\u7ebf\u7a0b\u8fd0\u884c"""\n    # \u7a0b\u5e8f\u542f\u52a8\u65f6\u95f4\n    time_data = time.time()\n    with ThreadPoolExecutor(max_workers=10) as pool:\n        pool.map(start)\n    multithread_consume_time = time.time() - time_data\n    print("\u591a\u7ebf\u7a0b\u8017\u65f6\uff1a", multithread_consume_time)\n    return multithread_consume_time\ndef multiprocess_task():\n    """\u591a\u7ebf\u7a0b\u8fd0\u884c"""\n    # \u7a0b\u5e8f\u542f\u52a8\u65f6\u95f4\n    time_data = time.time()\n    with ProcessPoolExecutor(max_workers=10) as pool:\n        pool.map(start)\n    multiprocess_consume_time = time.time() - time_data\n    print("\u591a\u8fdb\u7a0b\u8017\u65f6\uff1a", multiprocess_consume_time)\n    return multiprocess_consume_time\nif __name__ == "__main__":\n    single_consume_time = single_task()\n    multithread_consume_time = multithread_task()\n    multiprocess_consume_time = multiprocess_task()\n    print(single_consume_time > multithread_consume_time)\n    print(single_consume_time > multiprocess_consume_time)\n    print(multithread_consume_time > multiprocess_consume_time)<\/code><\/pre>\n
\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n
\"image-20221208153757239\" <\/p>\n
\u53ef\u89c1\u8017\u65f6\u6392\u540d\uff1a\u5355\u7ebf\u7a0b\u8017\u65f6>\u591a\u8fdb\u7a0b\u8017\u65f6>\u591a\u7ebf\u7a0b\u8017\u65f6<\/strong><\/p>\n
\u89c6\u9891\u4f5c\u8005\u4e0d\u662f\u7ebf\u7a0b\u6c60\u7684\u5199\u6cd5\uff0c\u6211\u4eec\u53c2\u8003\u4e00\u4e0b\uff1a<\/p>\n
import time\nimport threading\n#CPU \u88f8\u5954\ndef start():\n    """\u5355\u7eaf\u8ba1\u7b97  \u6d88\u8017CPU\u8d44\u6e90  \u6ca1\u6709\u5b9e\u9645\u610f\u4e49"""\n    data = 0\n    for _ in range(1000000):\n        data += 1\n    return\n\ndef single_task():\n    """\u5355\u7ebf\u7a0b\u8fd0\u884c"""\n    # \u7a0b\u5e8f\u542f\u52a8\u65f6\u95f4\n    time_data = time.time()\n    # \u6267\u884c10\u6b21\n    for _ in range(10):\n        start()\n    # \u6253\u5370\u7a0b\u5e8f\u6d88\u8017\u65f6\u95f4\n    single_consume_time = time.time() - time_data\n    print("\u5355\u7ebf\u7a0b\u8017\u65f6\uff1a", single_consume_time)\n    return single_consume_time\ndef multithread_task():\n    """\u591a\u7ebf\u7a0b\u8fd0\u884c"""\n    # \u7a0b\u5e8f\u542f\u52a8\u65f6\u95f4\n    time_data = time.time()\n    ts = {}\n    for i in range(10):\n        t = threading.Thread(target=start)\n        t.start()\n        ts[i] = t\n    for i in range(10):\n        ts[i].join()\n    multithread_consume_time = time.time() - time_data\n    print("\u591a\u7ebf\u7a0b\u8017\u65f6\uff1a", multithread_consume_time)\n    return multithread_consume_time\nif __name__ == "__main__":\n    single_consume_time = single_task()\n    multithread_consume_time = multithread_task()<\/code><\/pre>\n
\u8fd0\u884c\u7ed3\u679c\u662f\u4e24\u8005\u65f6\u95f4\u5dee\u4e0d\u591a\uff0c\u51e0\u6b21\u4e0b\u6765\u6709\u65f6\u5355\u7ebf\u7a0b\u8017\u65f6\u591a\uff0c\u6709\u65f6\u591a\u7ebf\u7a0b\u8017\u65f6\u591a\uff1a<\/p>\n
\"image-20221208154419863\"<\/strong><\/p>\n
\u7ebf\u7a0b\u6c60\u7684\u5199\u6cd5\u4e3a\u5565\u8fd9\u4e48\u5feb\uff0c\u666e\u901a\u591a\u7ebf\u7a0b\u7684\u5199\u6cd5\u4e3a\u5565\u8fd9\u4e48\u6162\uff1f<\/p>\n
\u4ee5\u53cajoin()<\/code>\u7684\u4f5c\u7528\uff1f\u2014\u2014\u5835\u585e\u7ebf\u7a0b<\/p>\n
4.\u4ec0\u4e48\u662f\u5835\u585e\u7ebf\u7a0b<\/h2>\n
5.\u975e\u5b88\u62a4\u4e0e\u5b88\u62a4\u7ebf\u7a0b<\/h2>\n
6.\u666e\u901a\u9501\u4e0e\u9012\u5f52\u9501<\/h2>\n
7.\u7ebf\u7a0b\\\u8fdb\u7a0b\u6c60<\/h2>\n
from concurrent.futures import ThreadPoolExecutor, ProcessPoolExecutor\nwith ProcessPoolExecutor(max_workers=20) as pool:\n    res = pool.map(run, company_list)<\/code><\/pre>\n
\u7ebf\u7a0b\/\u8fdb\u7a0b\u6c60\u6700\u5927\u6570\u91cf\u9650\u5236<\/h3>\n
\u7ecf\u68c0\u6d4b\uff0c\u591a\u8fdb\u7a0b\u5728windows\u7aef\u662f\u6709\u6570\u91cf\u9650\u5236\u7684\uff0c\u6700\u592761\u4e2a\u7ebf\u7a0b<\/p>\n
with ProcessPoolExecutor(max_workers=500) as pool:\n    res = pool.map(run, company_list)<\/code><\/pre>\n
\"image-20221208014150294\"<\/p>\n
\u800c\u5728linux\u7aef\u5219\u6ca1\u6709\u9650\u5236\uff0c\u4ee5\u53ca\u5728windows\u7aef\u7684\u591a\u8fdb\u7a0b\u4e5f\u6ca1\u6709\u6570\u91cf\u7684\u9650\u5236<\/p>\n
\u90a3\u4e48\u4e3a\u4e86\u5b9e\u73b0\u9ad8\u5e76\u53d1\u7684\u60c5\u51b5\uff0c\u5e76\u4e14\u4e0d\u6e05\u695a\u4efb\u52a1\u6570\u91cf\u7684\u60c5\u51b5\u4e0b\uff0c\u8fd8\u662f\u9009\u62e9\u7ebf\u7a0b\u6c60\u6bd4\u8f83\u7406\u60f3\uff0c\u517c\u5bb9\u6027\u66f4\u597d<\/p>\n
\u81f3\u4e8e\u4e0a\u7ebf\uff0c\u5e76\u4e0d\u6e05\u695a\uff0c\u51e0\u4e07\u7684\u5e76\u53d1\u662f\u53ef\u4ee5\u8fd0\u884c\u7684\uff0c\u4e3b\u8981\u8fd8\u662f\u770b\u4e3b\u673a\u7684\u627f\u53d7\u80fd\u529b\uff0c\u6211\u8f93\u5165\u51e0\u4ebf\u7684\u5e76\u53d1\u6570\u91cf\uff0cWindows\u76f4\u63a5\u5361\u6b7b\u4e86\u3002\u3002\u3002<\/p>\n
\u6240\u4ee5\u8bf4\uff0c\u8fd8\u662f\u9009\u62e9\u591a\u8fdb\u7a0b\u6bd4\u8f83\u65b9\u4fbf\u3002<\/p>\n
\"image-20221208014612769\" <\/p>\n
\u672c\u4eba\u53c8\u62ff\u516c\u53f8\u7684\u7535\u8111\u6d4b\u8bd5\u4e86\uff0c\u6211\u9760\u591a\u7ebf\u7a0b\u5c45\u7136\u53c8\u4e0d\u662f61\u4e2a\u6570\u91cf\u9650\u5236\u4e86\uff0c\u6240\u4ee5\u8bf4\uff0c\u591a\u7ebf\u7a0b\u8fd8\u662f\u770b\u673a\u5668\u3002<\/p>\n
\"image-20221208015305588\"<\/p>\n
\u6267\u884c\u987a\u5e8f<\/h3>\n
\u4e00\u822c\u6765\u8bf4\u662f\u968f\u673a\u7684\uff0c<\/p>\n","protected":false},"excerpt":{"rendered":"
1.\u7ebf\u7a0b\u548c\u8fdb\u7a0b \u8fdb\u7a0b\u53ea\u662f\u5360\u5185\u5b58 \u7ebf\u7a0b\u624d\u6d88\u8017CPU 2.\u5168\u5c40\u89e3\u91ca\u5668\u9501GIL GIL\u662f\u89e3\u91ca\u5668\u7528\u4e8e\u540c\u6b65\u7ebf\u7a0b\u7684\u4e00\u79cd\u673a\u5236 \u5b83\u4f7f\u5f97\u4efb\u4f55\u65f6\u523b\u4ec5\u6709\u4e00\u4e2a\u7ebf   \u2026 …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[32],"tags":[],"_links":{"self":[{"href":"\/index.php?rest_route=\/wp\/v2\/posts\/1465"}],"collection":[{"href":"\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1465"}],"version-history":[{"count":1,"href":"\/index.php?rest_route=\/wp\/v2\/posts\/1465\/revisions"}],"predecessor-version":[{"id":1466,"href":"\/index.php?rest_route=\/wp\/v2\/posts\/1465\/revisions\/1466"}],"wp:attachment":[{"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1465"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1465"},{"taxonomy":"post_tag","embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1465"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}