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ES2017\u5f15\u5165\u7684\u4e00\u79cd\u5f02\u6b65\u7f16\u7a0b\u8bed\u6cd5\u7cd6\uff0c\u4f7f\u5f02\u6b65\u4ee3\u7801\u770b\u8d77\u6765\u66f4\u50cf\u540c\u6b65\u4ee3\u7801\u3002\u4f7f\u7528<code>async<\/code>\u5173\u952e\u5b57\u5b9a\u4e49\u5f02\u6b65\u51fd\u6570\uff0c\u4f7f\u7528<code>await<\/code>\u5173\u952e\u5b57\u7b49\u5f85\u4e00\u4e2aPromise\u5bf9\u8c61\u7684\u89e3\u6790\u7ed3\u679c\u3002\u8fd9\u79cd\u65b9\u5f0f\u4f7f\u5f97\u5f02\u6b65\u4ee3\u7801\u66f4\u6613\u4e8e\u7406\u89e3\u548c\u7ef4\u62a4\u3002<\/li>\n<li><strong>Event Loop\u548cEvent Driven\u67b6\u6784<\/strong>\uff1a\u5728Node.js\u7b49\u73af\u5883\u4e2d\uff0c\u6574\u4e2a\u7a0b\u5e8f\u7684\u6267\u884c\u6a21\u578b\u5c31\u662f\u57fa\u4e8e\u4e8b\u4ef6\u9a71\u52a8\u7684\u3002\u6240\u6709\u7684\u5f02\u6b65\u64cd\u4f5c\u90fd\u5728\u4e8b\u4ef6\u5faa\u73af\u4e2d\u6ce8\u518c\uff0c\u4e00\u65e6\u64cd\u4f5c\u5b8c\u6210\uff0c\u5c31\u4f1a\u89e6\u53d1\u76f8\u5e94\u7684\u4e8b\u4ef6\u5904\u7406\u5668\u3002<\/li>\n<\/ol>\n<p>\u5728\u5b9e\u8df5\u4e2d\uff0c\u4f60\u53ef\u80fd\u9700\u8981\u6839\u636e\u5177\u4f53\u7684\u7f16\u7a0b\u73af\u5883\u548c\u9700\u6c42\u9009\u62e9\u6700\u9002\u5408\u7684\u5f02\u6b65\u5904\u7406\u65b9\u5f0f\u3002\u65e0\u8bba\u662f\u4f7f\u7528\u56de\u8c03\u3001Promises\u8fd8\u662fasync\/await\uff0c\u5173\u952e\u5728\u4e8e\u786e\u4fdd\u4f60\u7684\u7a0b\u5e8f\u80fd\u591f\u6b63\u786e\u5730\u5904\u7406\u5f02\u6b65\u64cd\u4f5c\u7684\u7ed3\u679c\uff0c\u800c\u4e0d\u81f3\u4e8e\u56e0\u4e3a\u5f02\u6b65\u64cd\u4f5c\u7684\u975e\u963b\u585e\u6027\u8d28\u5bfc\u81f4\u7a0b\u5e8f\u72b6\u6001\u6df7\u4e71\u3002<\/p>\n<p>\u76f8\u5bf9\u4e8e\u7ebf\u7a0b\u6765\u8bf4\uff0c\u534f\u7a0b\u4e0d\u5b58\u5728\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u4e2d\uff0c\u5b83\u53ea\u662f\u4e00\u79cd\u7a0b\u5e8f\u7ea7\u522b\u4e0a\u7684IO\u8c03\u5ea6\u3002\u8bfb\u8005\u53ef\u4ee5\u5c06\u5b83\u7406\u89e3\u4e3a\u5bf9\u73b0\u6709\u7ebf\u7a0b\u8fdb\u884c\u7684\u4e00\u6b21\u5206\u7247\u4efb\u52a1\u5904\u7406\uff0c\u7ebf\u7a0b\u53ef\u4ee5\u5728\u4ee3\u7801\u5757\u4e4b\u95f4\u6765\u56de\u5207\u6362\u6267\u884c\uff0c\u800c\u975e\u9010\u884c\u6267\u884c\uff0c\u56e0\u6b64\u80fd\u591f\u652f\u6301\u66f4\u5feb\u7684\u4e0a\u4e0b\u6587\u5207\u6362\uff0c\u51cf\u5c11\u7ebf\u7a0b\u7684\u521b\u5efa\u5f00\u9500\u548c\u5207\u6362\u5f00\u9500\uff0c\u4ece\u800c\u5927\u5927\u63d0\u9ad8\u4e86\u7cfb\u7edf\u6027\u80fd\u3002<\/p>\n<p>asyncio\u662fPython\u5b98\u65b9\u63d0\u4f9b\u7684\u7528\u4e8e\u6784\u5efa\u534f\u7a0b\u7684\u5e76\u53d1\u5e94\u7528\u5e93\uff0c\u662fFastAPI\u5b9e\u73b0\u5f02\u6b65\u7279\u6027\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\u3002\u57fa\u4e8easyncio\uff0c\u53ef\u4ee5\u5728\u5355\u7ebf\u7a0b\u6a21\u5f0f\u4e0b\u5904\u7406\u66f4\u591a\u7684\u5e76\u53d1\u4efb\u52a1\uff0c\u5b83\u662f\u4e00\u4e2a\u5f02\u6b65IO\u6846\u67b6\uff0c\u800c\u5f02\u6b65IO\u5176\u5b9e\u662f\u57fa\u4e8e\u4e8b\u4ef6\u89e6\u53d1\u673a\u5236\u6765\u5b9e\u73b0\u5f02\u6b65\u56de\u8c03\u7684\uff0c\u5728IO\u5904\u7406\u4e0a\u4e3b\u8981\u91c7\u7528\u4e86IO\u590d\u7528\u673a\u5236\u6765\u5b9e\u73b0\u975e\u963b\u585e\u64cd\u4f5c\u3002\u5728\u5f00\u59cb\u4f7f\u7528asyncio\u4e4b\u524d\uff0c\u9700\u8981\u5148\u521d\u6b65\u4e86\u89e3asyncio\u7684\u4e00\u4e9b\u6838\u5fc3\u77e5\u8bc6\u70b9\u3002<\/p>\n<p>asyncio\u7684\u6838\u5fc3\u662fEventloop\uff08\u4e8b\u4ef6\u5faa\u73af\uff09\uff0c\u5b83\u4ee5Eventloop\u4e3a\u6838\u5fc3\u6765\u5b9e\u73b0\u534f\u7a0b\u51fd\u6570\u7ed3\u679c\u7684\u56de\u8c03\u3002\u5b83\u63d0\u4f9b\u4e86\u76f8\u5173\u534f\u7a0b\u4efb\u52a1\u7684\u6ce8\u518c\u3001\u53d6\u6d88\u3001\u6267\u884c\u53ca\u56de\u8c03\u7b49\u65b9\u6cd5\u6765\u5b9e\u73b0\u5e76\u53d1\u3002<\/p>\n<p>\u5728Eventloop\u4e2d\u6267\u884c\u7684\u4efb\u52a1\u5176\u5b9e\u5c31\u662f\u4eba\u4eec\u5b9a\u4e49\u7684\u5404\u79cd\u534f\u7a0b\u5bf9\u8c61\u3002\u901a\u5e38\uff0c\u6bcf\u4e00\u4e2a\u534f\u7a0b\u5bf9\u8c61\u5185\u90e8\u90fd\u4f1a\u5305\u542b\u81ea\u8eab\u9700\u8981\u7b49\u5f85\u5904\u7406\u7684IO\u4efb\u52a1\u3002\u5f53Eventloop\u5904\u7406\u534f\u7a0b\u4efb\u52a1\u65f6\uff0c\u9047\u5230\u9700\u8981\u7b49\u5f85\u5904\u7406\u7684IO\u4efb\u52a1\uff0c\u4f1a\u81ea\u52a8\u6267\u884c\u6743\u9650\u5207\u6362\uff0c\u81ea\u52a8\u53bb\u6267\u884c\u4e0b\u4e00\u4e2a\u534f\u7a0b\u4efb\u52a1\u3002\u5f53\u4e0a\u4e00\u4e2aIO\u4efb\u52a1\u5b8c\u6210\u65f6\uff0c\u4f1a\u5728\u4e0b\u4e00\u6b21\u4e8b\u4ef6\u5faa\u73af\u8fd4\u56de\u6700\u7ec8\u7b49\u5f85\u7ed3\u679c\u7684\u72b6\u6001\u3002\u8fd9\u79cd\u591a\u4efb\u52a1\u4ea4\u66ff\u8f6e\u6362\u7684\u534f\u540c\u5904\u7406\u673a\u5236\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8CPU\u7684\u4f7f\u7528\u7387\uff0c\u8fdb\u800c\u63d0\u5347\u5e76\u53d1\u80fd\u529b\u3002<\/p>\n<p>\u5b9a\u4e49\u4e00\u4e2a\u534f\u7a0b\u51fd\u6570\uff08Coroutine\uff09\u7684\u6838\u5fc3\u662fasync\u5173\u952e\u8bcd\u3002\u901a\u8fc7\u8be5\u5173\u952e\u8bcd\uff0c\u4eba\u4eec\u53ef\u4ee5\u628a\u4e00\u4e2a\u666e\u901a\u7684\u51fd\u6570\u8f6c\u6362\u4e3a\u4e00\u4e2a\u534f\u7a0b\u51fd\u6570\uff0c\u8f6c\u53d8\u540e\u534f\u7a0b\u51fd\u6570\u7684\u8fd0\u884c\u5c31\u4e0d\u50cf\u666e\u901a\u51fd\u6570\u90a3\u6837\u4e86\uff0c\u5b83\u9700\u8981\u4f9d\u8d56\u4e8e\u4e0a\u9762\u63d0\u5230\u7684Eventloop\u3002\u5f53\u5bf9\u534f\u7a0b\u51fd\u6570\u6267\u884c\u201c\u534f\u7a0b\u51fd\u6570()\u201d\u65f6\uff0c\u201c\u534f\u7a0b\u51fd\u6570()\u201d\u8868\u793a\u4e00\u4e2a\u534f\u7a0b\u5bf9\u8c61\u3002\u6b64\u65f6\u6267\u884c\u201cawait\u534f\u7a0b\u51fd\u6570()\u201d\u8868\u793a\u521b\u5efa\u4e86\u5bf9\u5e94\u7684Task\u5e76\u653e\u5165\u5faa\u73af\u4e8b\u4ef6\uff08\u4e5f\u53ef\u4ee5\u901a\u8fc7asyncio.create_task()\u6765\u521b\u5efaTask\uff09\uff0c\u8be5Task\u5c31\u662f\u534f\u7a0b\u51fd\u6570\u8981\u6267\u884c\u7684\u903b\u8f91\u3002<\/p>\n<h1>asyncio\u534f\u7a0b\u7b80\u5355\u5e94\u7528<\/h1>\n<p>\u672c\u8282\u901a\u8fc7\u51e0\u4e2a\u7b80\u5355\u7684\u6848\u4f8b\u6765\u8bf4\u660e\u540c\u6b65\u548c\u5f02\u6b65\u4e4b\u95f4\u7684\u5dee\u5f02\uff0c\u901a\u8fc7\u6848\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u4ece\u4ee3\u7801\u5c42\u9762\u4f53\u4f1a\u540c\u6b65\u548c\u5f02\u6b65\u662f\u5982\u4f55\u63d0\u5347\u8fd0\u884c\u6548\u7387\u7684\u3002<\/p>\n<p>\u6848\u4f8b\u8bf4\u660e\uff1a\u8fd9\u91cc\u5faa\u73af\u8bf7\u6c4250\u6b21\uff0c\u4ee5\u767e\u5ea6\u9996\u9875\u4e3a\u5bf9\u6bd4\u5bf9\u8c61\u3002\u9996\u5148\u4f7f\u7528\u5355\u7ebf\u7a0b\u3001\u540c\u6b65\u4ee3\u7801\u7684\u65b9\u5f0f\u8bf7\u6c42\u5904\u7406\uff0c\u5177\u4f53\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\u3002<\/p>\n<pre><code class=\"language-python\">import requests\nimport time\n\ndef take_up_time(func):\n    def wrapper(*args, **kwargs):\n        print(&quot;\u5f00\u59cb\u6267\u884c----&gt;&quot;)\n        now = time.time()\n        result = func(*args, **kwargs)\n        using = (time.time() - now) * 1000\n        print(f&quot;\u7ed3\u675f\u6267\u884c,\u6d88\u8017\u65f6\u95f4\u4e3a\uff1a{using}ms&quot;)\n        return result\n    return wrapper\n\ndef request_sync(url):\n    response = requests.get(url)\n    return response\n\n@take_up_time\ndef run():\n    for i in range(0, 50):\n        request_sync(&#039;https:\/\/www.baidu.com&#039;)\n\nif __name__ == &#039;__main__&#039;:\n    run()<\/code><\/pre>\n<p>\u4e0a\u8ff0\u4ee3\u7801\u8bf4\u660e\uff1a<\/p>\n<ul>\n<li>\u9996\u5148\u5bfc\u5165\u4e86requests\u5e93\u4ee5\u53catime\u5e93\u3002<\/li>\n<li>\u7136\u540e\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3atake_up_time\u7684\u88c5\u9970\u5668\u3002\u5b83\u4e3b\u8981\u7528\u4e8e\u8ba1\u7b97\u88ab\u88c5\u9970\u51fd\u6570\u7684\u4e1a\u52a1\u903b\u8f91\u6267\u884c\u6240\u9700\u7684\u65f6\u95f4\u3002<\/li>\n<li>\u7d27\u63a5\u7740\u5b9a\u4e49\u4e86request_sync()\u51fd\u6570\u3002\u5728\u51fd\u6570\u5185\u90e8\uff0c\u901a\u8fc7requests\u5411\u767e\u5ea6\u9996\u9875\u5730\u5740\u53d1\u8d77\u8bf7\u6c42\u5904\u7406\u3002<\/li>\n<li>\u6700\u540e\u5b9a\u4e49\u4e86\u4e00\u4e2arun()\u51fd\u6570\u3002\u8be5\u51fd\u6570\u4f7f\u7528@take_up_time\u8fdb\u884c\u88c5\u9970\u5904\u7406\uff0c\u4e14\u5728run()\u51fd\u6570\u5185\u90e8\uff0c\u901a\u8fc7for\u5faa\u73af\u7684\u65b9\u5f0f\u8fdb\u884c\u904d\u5386\uff0c\u901a\u8fc7\u8c03\u7528request_sync()\u51fd\u6570\u8fdb\u884c\u8bf7\u6c42\u5904\u7406\u3002<\/li>\n<\/ul>\n<p>\u4e0a\u8ff0\u4ee3\u7801\u7684\u6267\u884c\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre><code>\/root\/anaconda3\/bin\/conda run -p \/root\/anaconda3 --no-capture-output python \/root\/workspace\/fastapi_tutorial\/chapter01\/asyncio\/contrast_sync.py \n\u5f00\u59cb\u6267\u884c----&gt;\n\u7ed3\u675f\u6267\u884c,\u6d88\u8017\u65f6\u95f4\u4e3a\uff1a4577.843904495239ms\n\n\u8fdb\u7a0b\u5df2\u7ed3\u675f\uff0c\u9000\u51fa\u4ee3\u7801\u4e3a 0<\/code><\/pre>\n<p>\u4e0a\u9762\u7684\u6848\u4f8b\u5728\u4f7f\u7528requests\u540c\u6b65\u5e93\u8bf7\u6c4250\u6b21\u767e\u5ea6\u9996\u9875\u5730\u5740\u7684\u60c5\u51b5\u4e0b\uff0c\u663e\u793a\u6d88\u8017\u7684\u65f6\u95f4\u7ea6\u4e3a4577ms\u3002\u63a5\u4e0b\u6765\u66f4\u6362\u4e3a\u4e00\u4e2a\u5f02\u6b65\u7684HTTP\u8bf7\u6c42\u5e93\uff0c\u6539\u5199\u5e76\u53d1\u8bf7\u6c42\u5904\u7406\uff0c\u5177\u4f53\u4ee3\u7801\u5982\u4e0b\u3002<\/p>\n<pre><code class=\"language-python\">import aiohttp, asyncio, time\n\ndef take_up_time(func):\n    def wrapper(*args, **kwargs):\n        print(&quot;\u5f00\u59cb\u6267\u884c----&gt;&quot;)\n        now = time.time()\n        result = func(*args, **kwargs)\n        using = (time.time() - now) * 1000\n        print(f&quot;\u7ed3\u675f\u6267\u884c,\u6d88\u8017\u65f6\u95f4\u4e3a\uff1a{using}ms&quot;)\n        return result\n\n    return wrapper\n\nasync def request_async():\n    async with aiohttp.ClientSession() as session:\n        async with session.get(&#039;https:\/\/www.baidu.com&#039;) as resp:\n            pass\n\n@take_up_time\ndef run():\n    tasks = [asyncio.ensure_future(request_async()) for x in range(0, 49)]\n    loop = asyncio.get_event_loop()\n    tasks = asyncio.gather(*tasks)\n    loop.run_until_complete(tasks)\n\nif __name__ == &#039;__main__&#039;:\n    run()<\/code><\/pre>\n<p>\u4e0a\u8ff0\u4ee3\u7801\u8bf4\u660e\uff1a<\/p>\n<ul>\n<li>\u9996\u5148\u5bfc\u5165\u4e86aiohttp\u3001asyncio\u4ee5\u53catime\u5e93\u3002\u5176\u4e2d\uff0casyncio\u7528\u4e8e\u5f02\u6b65\u5904\u7406\uff0caiohttp\u7528\u4e8e\u5f02\u6b65\u8bf7\u6c42\u5904\u7406\u3002<\/li>\n<li>\u7136\u540e\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3atake_up_time\u7684\u88c5\u9970\u5668\u3002\u5b83\u4e3b\u8981\u7528\u4e8e\u8ba1\u7b97\u88ab\u88c5\u9970\u51fd\u6570\u7684\u4e1a\u52a1\u903b\u8f91\u6267\u884c\u6240\u9700\u7684\u65f6\u95f4\u3002<\/li>\n<li>\u7d27\u63a5\u7740\u5b9a\u4e49\u4e86\u4e00\u4e2arequest_async()\u534f\u7a0b\u51fd\u6570\u3002\u5728\u8be5\u534f\u7a0b\u51fd\u6570\u5185\u90e8\uff0c\u4e3b\u8981\u901a\u8fc7aiohttp\u53d1\u8d77\u5f02\u6b65\u8bf7\u6c42\u5904\u7406<\/li>\n<\/ul>\n<p>\u6700\u540e\u5b9a\u4e49\u4e86\u4e00\u4e2arun()\u51fd\u6570\u3002\u8be5\u51fd\u6570\u4f7f\u7528@take_up_time\u8fdb\u884c\u88c5\u9970\u5904\u7406\uff0c\u4e14\u5728run()\u51fd\u6570\u5185\u90e8\uff0c\u901a\u8fc7for\u5faa\u73af\u7684\u65b9\u5f0f\u6279\u91cf\u521b\u5efa\u534f\u7a0b\u4efb\u52a1\uff0c\u5e76\u6dfb\u52a0\u5230tasks\u5217\u8868\u4e2d\uff0c\u4e4b\u540e\u901a\u8fc7\u8c03\u7528asyncio.gather(*tasks)\u6279\u91cf\u5e76\u53d1\u8c03\u7528request_async()\u534f\u7a0b\u51fd\u6570\u6765\u8fdb\u884c\u8bf7\u6c42\u5904\u7406\u3002<\/p>\n<p>\u4e0a\u8ff0\u4ee3\u7801\u7684\u6267\u884c\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre><code>\/root\/anaconda3\/bin\/conda run -p \/root\/anaconda3 --no-capture-output python \/root\/workspace\/fastapi_tutorial\/chapter01\/asyncio\/cotrast_async.py \n\u5f00\u59cb\u6267\u884c----&gt;\n\u7ed3\u675f\u6267\u884c,\u6d88\u8017\u65f6\u95f4\u4e3a\uff1a123.23355674743652ms\n\n\u8fdb\u7a0b\u5df2\u7ed3\u675f\uff0c\u9000\u51fa\u4ee3\u7801\u4e3a 0<\/code><\/pre>\n<p>\u4e0a\u9762\u7684\u6848\u4f8b\u5728\u4f7f\u7528aiohttp\u5f02\u6b65\u5e93\u8bf7\u6c4250\u6b21\u767e\u5ea6\u9996\u9875\u5730\u5740\u7684\u60c5\u51b5\u4e0b\uff0c\u663e\u793a\u6d88\u8017\u7684\u65f6\u95f4\u7ea6\u4e3a123ms\u3002\u7531\u6b64\u53ef\u89c1\uff0c\u540c\u6837\u662f\u5e76\u53d1\u5904\u740650\u6b21\uff0c\u540c\u6837\u662f\u5728\u5355\u7ebf\u7a0b\u7684\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528\u5f02\u6b65\u534f\u7a0b\u7684\u65b9\u5f0f\u5904\u7406\u8bf7\u6c42\u6bd4\u540c\u6b65\u5904\u7406\u8017\u65f6\u66f4\u77ed\u4e86\u3002\u8fd9\u5c31\u662f\u5f02\u6b65\u7684\u7279\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f02\u6b65\u7f16\u7a0b\u57fa\u7840 \u6211\u4eec\u77e5\u9053FastAPI\u6846\u67b6\u7684\u6700\u5927\u7279\u6027\u5c31\u662f\u5f02\u6b65\u652f\u6301\uff0c\u5728\u6df1\u5165FastAPI\u6846\u67b6\u7684\u5e94\u7528\u4e4b\u524d\uff0c\u9700\u8981\u5148\u7b80\u5355\u4e86\u89e3\u4e00\u4e9b\u5173\u4e8e\u5f02\u6b65\u7f16\u7a0b\u65b9\u9762\u7684   \u2026 &#8230;<\/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":[268,32],"tags":[],"_links":{"self":[{"href":"\/index.php?rest_route=\/wp\/v2\/posts\/9366"}],"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=9366"}],"version-history":[{"count":1,"href":"\/index.php?rest_route=\/wp\/v2\/posts\/9366\/revisions"}],"predecessor-version":[{"id":9367,"href":"\/index.php?rest_route=\/wp\/v2\/posts\/9366\/revisions\/9367"}],"wp:attachment":[{"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9366"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9366"},{"taxonomy":"post_tag","embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9366"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}