{"id":7484,"date":"2026-07-24T13:15:22","date_gmt":"2026-07-24T05:15:22","guid":{"rendered":"https:\/\/i007.cc\/wordpress\/?p=7484"},"modified":"2026-07-24T13:15:38","modified_gmt":"2026-07-24T05:15:38","slug":"%e5%8d%8f%e7%a8%8b%e5%88%b0%e5%ba%95%e8%a7%a3%e5%86%b3%e7%9a%84%e6%98%af%e4%bb%80%e4%b9%88%e9%97%ae%e9%a2%98%ef%bc%9f%e9%80%82%e7%94%a8%e9%82%a3%e4%ba%9b%e5%9c%ba%e6%99%af%ef%bc%9f%e4%b8%80%e4%b8%aabe","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/7484","title":{"rendered":"\u534f\u7a0b\u5230\u5e95\u89e3\u51b3\u7684\u662f\u4ec0\u4e48\u95ee\u9898\uff1f\u9002\u7528\u90a3\u4e9b\u573a\u666f\uff1f\u4e00\u4e2abest practice"},"content":{"rendered":"
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\u4e00\u53e5\u8bdd\uff1a\u534f\u7a0b\u89e3\u51b3\u7684\u662f”\u7b49\u5f85”\u671f\u95f4\u5982\u4f55\u4e0d\u6d6a\u8d39\u7ebf\u7a0b\u7684\u95ee\u9898\u3002<\/strong><\/p>\n

\u8981\u7406\u89e3\u8fd9\u53e5\u8bdd\uff0c\u5148\u770b\u6ca1\u6709\u534f\u7a0b\u65f6\u4f1a\u53d1\u751f\u4ec0\u4e48\u3002<\/p>\n

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\u95ee\u9898\u7684\u6839\u6e90\uff1aI\/O \u6bd4 CPU \u6162\u4e00\u4e07\u500d<\/h4>\n
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\u64cd\u4f5c                \u8017\u65f6\r\nL1 \u7f13\u5b58\u8bfb\u53d6         ~1 ns\r\n\u5185\u5b58\u8bfb\u53d6            ~100 ns\r\nSSD \u968f\u673a\u8bfb          ~100,000 ns   (0.1 ms)\r\n\u7f51\u7edc\u8bf7\u6c42\uff08\u540c\u57ce\uff09     ~500,000 ns   (0.5 ms)\r\n\u6570\u636e\u5e93\u67e5\u8be2          ~1,000,000 ns  (1 ms)<\/pre>\n
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\u4e00\u4e2a\u7ebf\u7a0b\u5728\u7b49\u5f85\u7f51\u7edc\u54cd\u5e94\u7684 1ms \u91cc\uff0c\u80fd\u6267\u884c\u5927\u7ea6\u00a0100 \u4e07\u6761 CPU \u6307\u4ee4<\/strong>\u3002\u8fd9\u4e9b CPU \u65f6\u95f4\u5168\u90e8\u6d6a\u8d39\u6389\u4e86\u3002<\/p>\n
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\u4e09\u79cd\u5e94\u5bf9\u65b9\u6848\uff0c\u5404\u6709\u4ee3\u4ef7<\/h4>\n
\u65b9\u6848\u4e00\uff1a\u540c\u6b65\u963b\u585e<\/strong><\/p>\n
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cpp<\/div>\n
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string result = http_get(\"\/api\/data\");  \/\/ \u7ebf\u7a0b\u5728\u8fd9\u91cc\u7761\u89c9\r\nprocess(result);<\/pre>\n
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\u6700\u7b80\u5355\uff0c\u4f46\u7ebf\u7a0b\u5728 I\/O \u671f\u95f4\u5b8c\u5168\u88ab\u5360\u4f4f\u3002\u5982\u679c\u6709 1 \u4e07\u4e2a\u5e76\u53d1\u8bf7\u6c42\uff0c\u5c31\u9700\u8981 1 \u4e07\u4e2a\u7ebf\u7a0b\u2014\u2014\u5185\u5b58\u7206\u70b8\uff08\u6bcf\u4e2a\u7ebf\u7a0b\u9ed8\u8ba4 8MB \u6808\uff09\uff0c\u4e0a\u4e0b\u6587\u5207\u6362\u5f00\u9500\u6781\u5927\u3002<\/p>\n
\u65b9\u6848\u4e8c\uff1a\u56de\u8c03\u5730\u72f1<\/strong><\/p>\n
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http_get(\"\/api\/user\", [](User user) {\r\n    http_get(\"\/api\/orders?id=\" + user.id, [user](Orders orders) {\r\n        db_query(\"INSERT ...\", [](Result r) {\r\n            \/\/ \u5d4c\u5957\u7b2c\u56db\u5c42...\r\n            \/\/ \u9519\u8bef\u5904\u7406\u5728\u54ea\uff1f\r\n            \/\/ \u5faa\u73af\u600e\u4e48\u5199\uff1f\r\n        });\r\n    });\r\n});<\/pre>\n
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\u7ebf\u7a0b\u4e0d\u963b\u585e\u4e86\uff0c\u4f46\u4ee3\u7801\u5931\u53bb\u4e86\u7ebf\u6027\u7ed3\u6784\uff0c\u9519\u8bef\u5904\u7406\u3001\u5faa\u73af\u3001\u65e9\u9000\u90fd\u53d8\u5f97\u6781\u5176\u9ebb\u70e6\u3002\u8fd9\u5c31\u662f\u8457\u540d\u7684”\u56de\u8c03\u5730\u72f1”\u3002<\/p>\n
\u65b9\u6848\u4e09\uff1a\u534f\u7a0b<\/strong><\/p>\n
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User user     = co_await http_get(\"\/api\/user\");\r\nOrders orders = co_await http_get(\"\/api\/orders?id=\" + user.id);\r\nResult r      = co_await db_query(\"INSERT ...\");<\/pre>\n
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\u4ee3\u7801\u5199\u8d77\u6765\u50cf\u540c\u6b65\uff0c\u6267\u884c\u8d77\u6765\u50cf\u5f02\u6b65\u3002co_await<\/code>\u00a0\u7684\u542b\u4e49\u662f\uff1a”\u6302\u8d77\u6211\u8fd9\u4e2a\u534f\u7a0b\uff0c\u8ba9\u51fa\u7ebf\u7a0b\u53bb\u5e72\u522b\u7684\u4e8b\uff0c\u7b49\u7ed3\u679c\u597d\u4e86\u518d\u56de\u6765\u7ee7\u7eed”\u3002<\/p>\n
\u8fd9\u624d\u662f\u534f\u7a0b\u7684\u672c\u8d28\u4ef7\u503c\uff1a\u7528\u540c\u6b65\u7684\u5199\u6cd5\uff0c\u5f97\u5230\u5f02\u6b65\u7684\u6027\u80fd\u3002<\/strong><\/p>\n
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\u534f\u7a0b vs \u7ebf\u7a0b\u7684\u6839\u672c\u533a\u522b<\/h4>\n
\u7ebf\u7a0b\u7684\u5207\u6362\u7531\u64cd\u4f5c\u7cfb\u7edf<\/strong>\u51b3\u5b9a\uff0c\u662f\u62a2\u5360\u5f0f\u7684\uff0c\u5207\u6362\u6210\u672c\u9ad8\uff08\u4fdd\u5b58\/\u6062\u590d\u5bc4\u5b58\u5668\u3001TLB \u5237\u65b0\u3001\u5185\u6838\u6001\u5207\u6362\uff0c\u7ea6 1-10 \u03bcs\uff09\u3002<\/p>\n
\u534f\u7a0b\u7684\u5207\u6362\u7531\u7a0b\u5e8f\u5458<\/strong>\uff08\u6216\u8fd0\u884c\u65f6\uff09\u51b3\u5b9a\uff0c\u662f\u534f\u4f5c\u5f0f\u7684\uff0c\u5207\u6362\u6210\u672c\u6781\u4f4e\uff08\u53ea\u9700\u4fdd\u5b58\u5c11\u91cf\u5bc4\u5b58\u5668\uff0c\u7ea6 10-100 ns\uff09\uff0c\u56e0\u4e3a\u5207\u6362\u70b9\u662f\u660e\u786e\u7684\u00a0co_await<\/code>\uff0c\u4e0d\u9700\u8981\u4fdd\u5b58\u5b8c\u6574\u7684 CPU \u72b6\u6001\u3002<\/p>\n
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10,000 \u4e2a\u5e76\u53d1\u8fde\u63a5\uff1a\r\n\r\n\u7ebf\u7a0b\u6a21\u578b\uff1a10,000 \u4e2a\u7ebf\u7a0b \u00d7 8MB \u6808 = 80GB \u5185\u5b58\uff08\u4e0d\u53ef\u80fd\uff09\r\n\u534f\u7a0b\u6a21\u578b\uff1a10,000 \u4e2a\u534f\u7a0b \u00d7 ~200B \u5e27 = 2MB \u5185\u5b58\uff08\u6ca1\u95ee\u9898\uff09<\/pre>\n
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\u9002\u7528\u573a\u666f<\/h3>\n
\u6838\u5fc3\u5224\u65ad\u6807\u51c6\uff1a\u4f60\u7684\u74f6\u9888\u662f I\/O \u8fd8\u662f CPU\uff1f<\/strong><\/p>\n
\u534f\u7a0b\u53ea\u5bf9 I\/O \u5bc6\u96c6\u578b\u6709\u6548\u3002CPU \u5bc6\u96c6\u578b\uff08\u56fe\u50cf\u5904\u7406\u3001\u52a0\u5bc6\u3001\u538b\u7f29\uff09\u7528\u534f\u7a0b\u6ca1\u6709\u610f\u4e49\uff0c\u5e94\u8be5\u7528\u7ebf\u7a0b\u6216\u8fdb\u7a0b\u5e76\u884c\u3002<\/p>\n
\u6700\u9002\u5408\u7684\u573a\u666f<\/h4>\n
\u7f51\u7edc\u670d\u52a1\u5668 \/ API \u7f51\u5173<\/strong>\uff1a\u6bcf\u4e2a\u8bf7\u6c42\u9700\u8981\u8c03\u7528\u591a\u4e2a\u4e0b\u6e38\u670d\u52a1\uff0c\u5927\u91cf\u65f6\u95f4\u5728\u7b49\u7f51\u7edc\u3002\u8fd9\u662f\u534f\u7a0b\u6700\u4e3b\u6d41\u7684\u7528\u6b66\u4e4b\u5730\u2014\u2014Nginx\u3001Node.js\u3001Go \u7684 HTTP \u670d\u52a1\u5668\u672c\u8d28\u90fd\u662f\u8fd9\u4e2a\u6a21\u578b\u3002<\/p>\n
\u6570\u636e\u5e93\u8bbf\u95ee\u5c42<\/strong>\uff1a\u67e5\u8be2\u8981\u7b49\u6570\u636e\u5e93\uff0c\u8fde\u63a5\u6c60\u914d\u5408\u534f\u7a0b\u53ef\u4ee5\u7528\u5c11\u91cf\u7ebf\u7a0b\u670d\u52a1\u5927\u91cf\u5e76\u53d1\u67e5\u8be2\u3002<\/p>\n
\u722c\u866b\u548c\u6279\u91cf HTTP \u8bf7\u6c42<\/strong>\uff1a\u540c\u65f6\u53d1\u51fa\u51e0\u5343\u4e2a\u8bf7\u6c42\uff0c\u7b49\u54cd\u5e94\u56de\u6765\u518d\u5904\u7406\uff0c\u6bd4\u591a\u7ebf\u7a0b\u9ad8\u6548\u5f97\u591a\u3002<\/p>\n
\u5b9e\u65f6\u901a\u4fe1\u7cfb\u7edf\uff08WebSocket\u3001\u957f\u8fde\u63a5\uff09<\/strong>\uff1a\u6bcf\u4e2a\u8fde\u63a5\u5927\u90e8\u5206\u65f6\u95f4\u662f\u7a7a\u95f2\u7684\uff0c\u7b49\u7528\u6237\u53d1\u6d88\u606f\uff0c\u534f\u7a0b\u53ef\u4ee5\u8ba9\u4e00\u4e2a\u7ebf\u7a0b\u7ef4\u62a4\u6570\u4e07\u4e2a\u8fde\u63a5\u3002<\/p>\n
\u6e38\u620f\u903b\u8f91\u811a\u672c<\/strong>\uff1a\u6280\u80fd\u91ca\u653e\u3001\u5267\u60c5\u5bf9\u8bdd\u8fd9\u7c7b”\u7b49\u5f85\u51e0\u79d2\u518d\u6267\u884c\u4e0b\u4e00\u6b65”\u7684\u903b\u8f91\uff0c\u7528\u534f\u7a0b\u6bd4\u72b6\u6001\u673a\u6e05\u6670\u5f97\u591a\u3002<\/p>\n
\u4e0d\u9002\u5408\u7684\u573a\u666f<\/h4>\n
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  • \u7eaf CPU \u8ba1\u7b97\uff08\u534f\u7a0b\u5e2e\u4e0d\u4e86\u4f60\uff0c\u7528\u7ebf\u7a0b\/SIMD\uff09<\/li>\n
  • \u4ee3\u7801\u5fc5\u987b\u8fd0\u884c\u5728\u4e0d\u652f\u6301\u5806\u5206\u914d\u7684\u786c\u4ef6\u4e0a\uff08\u534f\u7a0b\u5e27\u5728\u5806\u4e0a\uff09<\/li>\n
  • \u7b80\u5355\u7684\u5355\u6b21\u64cd\u4f5c\uff08\u6ca1\u6709\u5e76\u53d1\u9700\u6c42\u65f6\u5f15\u5165\u534f\u7a0b\u53ea\u589e\u52a0\u590d\u6742\u5ea6\uff09<\/li>\n<\/ul>\n
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    Best Practice\uff1a\u4e00\u4e2a\u5b8c\u6574\u53ef\u8fd0\u884c\u7684\u4f8b\u5b50<\/h3>\n
    \u7528\u00a0Asio<\/strong>\u00a0\u5199\u4e00\u4e2a\u5e76\u53d1 HTTP \u8bf7\u6c42\u805a\u5408\u5668\u2014\u2014\u540c\u65f6\u53d1\u51fa\u591a\u4e2a\u8bf7\u6c42\uff0c\u7b49\u6240\u6709\u7ed3\u679c\u56de\u6765\u540e\u5408\u5e76\uff0c\u8fd9\u662f\u6700\u5178\u578b\u7684\u534f\u7a0b\u4f7f\u7528\u6a21\u5f0f\u3002<\/p>\n
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    cpp<\/div>\n
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    \/\/ \u4f9d\u8d56\uff1aasio (standalone\uff0c\u4e0d\u9700\u8981 Boost)\r\n\/\/ \u7f16\u8bd1\uff1ag++ -std=c++20 -o demo demo.cpp -I\/path\/to\/asio\/include\r\n\r\n#include <asio.hpp>\r\n#include <asio\/co_spawn.hpp>\r\n#include <asio\/detached.hpp>\r\n#include <asio\/use_awaitable.hpp>\r\n#include <chrono>\r\n#include <iostream>\r\n#include <vector>\r\n\r\nusing namespace asio;\r\nusing namespace std::chrono_literals;\r\n\r\n\/\/ -------------------------------------------------------\r\n\/\/ \u6a21\u62df\u4e00\u6b21\u5f02\u6b65\u64cd\u4f5c\uff08\u771f\u5b9e\u573a\u666f\u6362\u6210 async_connect\/async_read\uff09\r\n\/\/ -------------------------------------------------------\r\nawaitable<std::string> fetch(io_context& ctx, std::string name, int delay_ms) {\r\n    \/\/ \u7528 timer \u6a21\u62df\u7f51\u7edc\u5ef6\u8fdf\r\n    steady_timer timer(ctx);\r\n    timer.expires_after(std::chrono::milliseconds(delay_ms));\r\n    co_await timer.async_wait(use_awaitable);\r\n    co_return \"result_from_\" + name;\r\n}\r\n\r\n\/\/ -------------------------------------------------------\r\n\/\/ \u4e32\u884c\uff1a\u4e00\u4e2a\u63a5\u4e00\u4e2a\u7b49\r\n\/\/ -------------------------------------------------------\r\nawaitable<void> serial_requests(io_context& ctx) {\r\n    auto t0 = std::chrono::steady_clock::now();\r\n\r\n    \/\/ \u4e09\u4e2a\u8bf7\u6c42\u4f9d\u6b21\u7b49\u5f85\uff0c\u603b\u65f6\u95f4 = 100 + 200 + 150 = 450ms\r\n    auto r1 = co_await fetch(ctx, \"service_A\", 100);\r\n    auto r2 = co_await fetch(ctx, \"service_B\", 200);\r\n    auto r3 = co_await fetch(ctx, \"service_C\", 150);\r\n\r\n    auto elapsed = std::chrono::duration_cast<std::chrono::milliseconds>(\r\n        std::chrono::steady_clock::now() - t0).count();\r\n\r\n    std::cout << \"[Serial] \" << r1 << \", \" << r2 << \", \" << r3\r\n              << \" \u2014 \" << elapsed << \"ms\\n\";\r\n}\r\n\r\n\/\/ -------------------------------------------------------\r\n\/\/ \u5e76\u53d1\uff1a\u540c\u65f6\u53d1\u51fa\uff0c\u7b49\u6700\u6162\u7684\u90a3\u4e2a\r\n\/\/ -------------------------------------------------------\r\nawaitable<void> concurrent_requests(io_context& ctx) {\r\n    auto t0 = std::chrono::steady_clock::now();\r\n\r\n    \/\/ experimental::make_parallel_group \u6216\u76f4\u63a5\u7528 co_spawn + channel\r\n    \/\/ \u8fd9\u91cc\u7528\u6700\u7b80\u6d01\u7684 awaitable<> \u7ec4\u5408\u65b9\u5f0f\uff1a\r\n    \/\/ \u540c\u65f6\u542f\u52a8\u4e09\u4e2a\u534f\u7a0b\uff0c\u4f7f\u7528 awaitable_operators \u7b49\u5f85\u5168\u90e8\u5b8c\u6210\r\n    using asio::experimental::awaitable_operators::operator&&;\r\n\r\n    auto [r1, r2, r3] = co_await (\r\n        fetch(ctx, \"service_A\", 100) &&\r\n        fetch(ctx, \"service_B\", 200) &&\r\n        fetch(ctx, \"service_C\", 150)\r\n    );\r\n    \/\/ \u603b\u65f6\u95f4 \u2248 max(100, 200, 150) = 200ms\r\n\r\n    auto elapsed = std::chrono::duration_cast<std::chrono::milliseconds>(\r\n        std::chrono::steady_clock::now() - t0).count();\r\n\r\n    std::cout << \"[Concurrent] \" << r1 << \", \" << r2 << \", \" << r3\r\n              << \" \u2014 \" << elapsed << \"ms\\n\";\r\n}\r\n\r\n\/\/ -------------------------------------------------------\r\n\/\/ \u5e26\u8d85\u65f6\uff1a\u4efb\u610f\u4e00\u4e2a\u5148\u5b8c\u6210\u5c31\u7ee7\u7eed\r\n\/\/ -------------------------------------------------------\r\nawaitable<void> with_timeout(io_context& ctx) {\r\n    using asio::experimental::awaitable_operators::operator||;\r\n\r\n    steady_timer timeout_timer(ctx);\r\n    timeout_timer.expires_after(120ms);\r\n\r\n    \/\/ fetch \u548c timeout \u7ade\u4e89\uff0c\u8c01\u5148\u5b8c\u6210\u7528\u8c01\u7684\u7ed3\u679c\r\n    auto result = co_await (\r\n        fetch(ctx, \"slow_service\", 300) ||\r\n        timeout_timer.async_wait(use_awaitable)\r\n    );\r\n\r\n    if (result.index() == 0)\r\n        std::cout << \"[Timeout] Got: \" << std::get<0>(result) << \"\\n\";\r\n    else\r\n        std::cout << \"[Timeout] Timed out after 120ms\\n\";\r\n}\r\n\r\n\/\/ -------------------------------------------------------\r\n\/\/ \u5e26\u9519\u8bef\u5904\u7406\u7684\u534f\u7a0b\r\n\/\/ -------------------------------------------------------\r\nawaitable<void> with_error_handling(io_context& ctx) {\r\n    try {\r\n        auto r = co_await fetch(ctx, \"flaky_service\", 50);\r\n        std::cout << \"[ErrorHandling] Success: \" << r << \"\\n\";\r\n    } catch (const std::exception& e) {\r\n        \/\/ co_await \u629b\u51fa\u5f02\u5e38\u5c31\u50cf\u540c\u6b65\u4ee3\u7801\u4e00\u6837\u81ea\u7136\r\n        std::cout << \"[ErrorHandling] Failed: \" << e.what() << \"\\n\";\r\n    }\r\n}\r\n\r\n\/\/ -------------------------------------------------------\r\n\/\/ \u5e26\u91cd\u8bd5\u7684\u534f\u7a0b\u2014\u2014\u6ce8\u610f\u8fd9\u91cc\u5faa\u73af\u5199\u8d77\u6765\u591a\u81ea\u7136\r\n\/\/ -------------------------------------------------------\r\nawaitable<std::string> fetch_with_retry(io_context& ctx,\r\n                                        std::string name,\r\n                                        int max_retries) {\r\n    for (int i = 0; i < max_retries; i++) {\r\n        try {\r\n            co_return co_await fetch(ctx, name, 50);\r\n        } catch (...) {\r\n            if (i == max_retries - 1) throw;  \/\/ \u6700\u540e\u4e00\u6b21\u5931\u8d25\u5c31\u629b\u51fa\r\n            std::cout << \"  retry \" << i + 1 << \"...\\n\";\r\n            steady_timer backoff(ctx);\r\n            backoff.expires_after(std::chrono::milliseconds(100 * (i + 1)));\r\n            co_await backoff.async_wait(use_awaitable);\r\n        }\r\n    }\r\n    throw std::runtime_error(\"unreachable\");\r\n}\r\n\r\n\/\/ -------------------------------------------------------\r\n\/\/ \u4e3b\u5165\u53e3\r\n\/\/ -------------------------------------------------------\r\nint main() {\r\n    io_context ctx;\r\n\r\n    \/\/ \u6ce8\u610f\uff1a\u6240\u6709\u534f\u7a0b\u90fd\u8dd1\u5728\u540c\u4e00\u4e2a\u7ebf\u7a0b\u4e0a\r\n    \/\/ \u5982\u679c\u9700\u8981\u591a\u7ebf\u7a0b\uff0c\u7528 ctx.run() \u5728\u591a\u4e2a\u7ebf\u7a0b\u91cc\u540c\u65f6\u8c03\u7528\r\n    co_spawn(ctx, serial_requests(ctx),     detached);\r\n    co_spawn(ctx, concurrent_requests(ctx), detached);\r\n    co_spawn(ctx, with_timeout(ctx),        detached);\r\n    co_spawn(ctx, with_error_handling(ctx), detached);\r\n\r\n    ctx.run();  \/\/ \u4e8b\u4ef6\u5faa\u73af\uff0c\u76f4\u5230\u6240\u6709\u534f\u7a0b\u5b8c\u6210\r\n    return 0;\r\n}<\/pre>\n
     <\/p>\n<\/div>\n<\/div>\n
    \u8fd0\u884c\u7ed3\u679c\u5927\u81f4\u662f\uff1a<\/p>\n
    \n
    \n
    <\/div>\n<\/div>\n
    \n
    [Serial]     result_from_service_A, result_from_service_B, result_from_service_C \u2014 450ms\r\n[Concurrent] result_from_service_A, result_from_service_B, result_from_service_C \u2014 200ms\r\n[Timeout]    Timed out after 120ms\r\n[ErrorHandling] Success: result_from_flaky_service<\/pre>\n
     <\/p>\n<\/div>\n<\/div>\n
    \u4e32\u884c 450ms\uff0c\u5e76\u53d1 200ms\u2014\u2014\u540c\u6837\u662f\u4e09\u4e2a\u8bf7\u6c42\uff0c\u65f6\u95f4\u7f29\u77ed\u4e86\u4e00\u534a\u591a\uff0c\u800c\u4e14\u53ea\u7528\u4e86\u4e00\u4e2a\u7ebf\u7a0b<\/strong>\u3002<\/p>\n
    \n
    \u51e0\u6761\u771f\u6b63\u7684 Best Practice<\/h3>\n
    1. \u6c38\u8fdc\u4e0d\u8981\u5728\u534f\u7a0b\u91cc\u8c03\u7528\u540c\u6b65\u963b\u585e\u64cd\u4f5c\u3002<\/strong>
    \nstd::this_thread::sleep_for()<\/code>\u3001\u540c\u6b65\u00a0read()<\/code>\u3001mutex::lock()<\/code>\u00a0\u4f1a\u963b\u585e\u6574\u4e2a\u7ebf\u7a0b\uff0c\u5176\u4ed6\u534f\u7a0b\u5168\u90e8\u5361\u6b7b\u3002\u6240\u6709\u963b\u585e\u64cd\u4f5c\u5fc5\u987b\u6362\u6210\u5f02\u6b65\u7248\u672c\u3002<\/p>\n
    2. \u7528\u00a0&&<\/code>\u00a0\u5e76\u53d1\uff0c\u4e0d\u8981\u4e32\u884c\u00a0co_await<\/code>\u3002<\/strong>
    \n\u5982\u679c\u4e24\u4e2a\u64cd\u4f5c\u6ca1\u6709\u4f9d\u8d56\u5173\u7cfb\uff0c\u6c38\u8fdc\u7528\u5e76\u53d1\u6a21\u5f0f\u3002\u4e32\u884c\u00a0co_await<\/code>\u00a0\u662f\u6700\u5e38\u89c1\u7684\u6027\u80fd\u9677\u9631\u3002<\/p>\n
    3. \u9519\u8bef\u5904\u7406\u7528 try\/catch\uff0c\u4e0d\u8981\u7528\u56de\u8c03\u5f0f error_code\u3002<\/strong>
    \n\u534f\u7a0b\u6700\u5927\u7684\u4eba\u4f53\u5de5\u5b66\u4f18\u52bf\u5c31\u662f\u53ef\u4ee5\u7528\u00a0try\/catch<\/code>\u00a0\u5199\u5f02\u5e38\u5904\u7406\uff0c\u4e0d\u8981\u653e\u5f03\u8fd9\u4e2a\u4f18\u52bf\u3002<\/p>\n
    4. \u53d6\u6d88\u548c\u8d85\u65f6\u662f\u5fc5\u987b\u8003\u8651\u7684\uff0c\u4e0d\u662f\u53ef\u9009\u7684\u3002<\/strong>
    \n\u6c38\u8fdc\u4e0d\u8981\u5199\u6ca1\u6709\u8d85\u65f6\u7684\u7f51\u7edc\u8bf7\u6c42\uff0c\u7528\u00a0||<\/code>\u00a0\u7ade\u4e89\u4e00\u4e2a timer \u662f\u6700\u7b80\u5355\u7684\u8d85\u65f6\u6a21\u5f0f\u3002<\/p>\n
    5. \u4fdd\u6301\u534f\u7a0b\u51fd\u6570\u77ed\u5c0f\uff0c\u5355\u4e00\u804c\u8d23\u3002<\/strong>
    \n\u534f\u7a0b\u7684\u751f\u547d\u5468\u671f\u7ba1\u7406\u6bd4\u666e\u901a\u51fd\u6570\u590d\u6742\uff0c\u51fd\u6570\u8d8a\u957f\u8d8a\u96be\u63a8\u7406\u3002\u628a\u590d\u6742\u903b\u8f91\u62c6\u6210\u591a\u4e2a\u00a0co_await<\/code>\u00a0\u7684\u5c0f\u534f\u7a0b\u3002<\/p>\n
    6. \u6ce8\u610f\u5bf9\u8c61\u751f\u547d\u5468\u671f\u3002<\/strong>
    \n\u534f\u7a0b\u5728\u00a0co_await<\/code>\u00a0\u70b9\u6302\u8d77\u671f\u95f4\uff0c\u8c03\u7528\u8005\u53ef\u80fd\u5df2\u7ecf\u6790\u6784\u4e86\u4f60\u6355\u83b7\u7684\u5f15\u7528\u3002\u6355\u83b7\u5f15\u7528\u65f6\u4e00\u5b9a\u8981\u786e\u8ba4\u5bf9\u8c61\u751f\u547d\u5468\u671f\u957f\u4e8e\u534f\u7a0b\u3002<\/p>\n
    \n
    \u6700\u540e\u4e00\u5f20\u56fe<\/h3>\n
    \n
    \n
    <\/div>\n<\/div>\n
    \n
    \u65f6\u95f4\u8f74 \u2192\r\n\u7ebf\u7a0b 1   [\u8bf7\u6c42A\u5904\u7406] [\u7b49\u5f85A\u7684I\/O......................] [\u5904\u7406A\u7ed3\u679c]\r\n         \u2191 \u4f20\u7edf\u963b\u585e\uff1a\u7ebf\u7a0b\u4e00\u76f4\u88ab\u5360\u7528\r\n\r\n\u7ebf\u7a0b 1   [\u8bf7\u6c42A\u53d1\u51fa] [\u8bf7\u6c42B\u53d1\u51fa] [\u8bf7\u6c42C\u53d1\u51fa] [A\u56de\u6765\u5904\u7406] [B\u56de\u6765\u5904\u7406] [C\u56de\u6765\u5904\u7406]\r\n         \u2191 \u534f\u7a0b\uff1aI\/O\u671f\u95f4\u7ebf\u7a0b\u53bb\u5904\u7406\u5176\u4ed6\u4e8b\uff0c\u541e\u5410\u91cf\u5927\u5e45\u63d0\u5347<\/pre>\n
     <\/p>\n<\/div>\n<\/div>\n
    \u534f\u7a0b\u4e0d\u8ba9\u4f60\u7684\u4ee3\u7801\u8dd1\u5f97\u66f4\u5feb<\/strong>\uff0c\u800c\u662f\u8ba9\u540c\u6837\u7684\u786c\u4ef6\u540c\u65f6\u505a\u66f4\u591a\u4e8b<\/strong>\u3002\u8fd9\u662f\u5b83\u7684\u672c\u8d28\u4ef7\u503c\uff0c\u4e5f\u662f\u5b83\u7684\u8fb9\u754c\u3002<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
    \u4e00\u53e5\u8bdd\uff1a\u534f\u7a0b\u89e3\u51b3\u7684\u662f”\u7b49\u5f85&<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[24],"tags":[],"class_list":["post-7484","post","type-post","status-publish","format-standard","hentry","category-value_docs"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/7484","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=7484"}],"version-history":[{"count":2,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/7484\/revisions"}],"predecessor-version":[{"id":7486,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/7484\/revisions\/7486"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=7484"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=7484"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=7484"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}