{"id":319,"date":"2026-09-06T01:24:40","date_gmt":"2026-09-05T17:24:40","guid":{"rendered":"https:\/\/www.ziliaochi.cn\/index.php\/2026\/09\/06\/interview-harmony-performance-25q\/"},"modified":"2026-09-06T01:24:40","modified_gmt":"2026-09-05T17:24:40","slug":"interview-harmony-performance-25q","status":"publish","type":"post","link":"https:\/\/www.ziliaochi.cn\/index.php\/2026\/09\/06\/interview-harmony-performance-25q\/","title":{"rendered":"\u9e3f\u8499\u6027\u80fd\u8c03\u4f18 25 \u95ee\uff1a\u72b6\u6001\u7c92\u5ea6\u3001LazyForEach \u4e0e\u5de5\u5177\u94fe"},"content":{"rendered":"
\n
\u5173\u952e\u8bcd<\/span>\u9e3f\u8499\u6027\u80fd\u9762\u8bd5\u3001ArkUI \u72b6\u6001\u7ba1\u7406\u3001LazyForEach\u3001cachedCount\u3001DevEco Profiler\u3001\u6027\u80fd\u57fa\u7ebf<\/div>\n
\n
\u76ee\u5f55<\/div>\n
    \n
  1. \u4e00\u3001\u542f\u52a8\u6027\u80fd\uff085 \u95ee\uff09<\/a><\/li>\n
  2. \u4e8c\u3001\u72b6\u6001\u7ba1\u7406\u4e0e\u6e32\u67d3\uff086 \u95ee\uff09<\/a><\/li>\n
  3. \u4e09\u3001\u5217\u8868\u4e0e\u6ed1\u52a8\uff085 \u95ee\uff09<\/a><\/li>\n
  4. \u56db\u3001\u5185\u5b58\u4e0e\u529f\u8017\uff084 \u95ee\uff09<\/a><\/li>\n
  5. \u4e94\u3001\u5de5\u5177\u94fe\u4e0e\u5ea6\u91cf\uff085 \u95ee\uff09<\/a><\/li>\n<\/ol>\n<\/div>\n

    \u9e3f\u8499\u6027\u80fd\u8c03\u4f18\u9762\u8bd5\u4e0e\u6280\u672f\u6587\u7ae0\u7684\u5dee\u5f02\u5728\u4e8e\uff1a\u9762\u8bd5\u5b98\u8981\u7684\u662f\u300c\u6307\u6807 \u2192 \u5de5\u5177 \u2192 \u624b\u6bb5 \u2192 \u9a8c\u8bc1\u300d\u7684\u5b8c\u6574\u95ed\u73af\u3002\u8fd9\u4efd 25 \u95ee\u6309\u542f\u52a8\u3001\u72b6\u6001\u4e0e\u6e32\u67d3\u3001\u5217\u8868\u4e0e\u6ed1\u52a8\u3001\u5185\u5b58\u4e0e\u529f\u8017\u3001\u5de5\u5177\u94fe\u4e94\u4e2a\u677f\u5757\u7ec4\u7ec7\uff0c\u7b54\u6848\u90fd\u63a7\u5236\u5728\u300c\u9762\u8bd5\u53e3\u8ff0 30 \u79d2\u300d\u7684\u957f\u5ea6\u3002<\/p>\n

    \u4e00\u3001\u542f\u52a8\u6027\u80fd\uff085 \u95ee\uff09<\/h2>\n

    1. \u9e3f\u8499\u5e94\u7528\u542f\u52a8\u6d41\u7a0b\u5206\u51e0\u6bb5\uff1f<\/h3>\n

    \u5e94\u7528\u51b7\u542f\u52a8\uff1a\u8fdb\u7a0b\u521b\u5efa \u2192 AbilityStage \u542f\u52a8 \u2192 UIAbility onCreate \u2192 \u9996\u5e27\u6e32\u67d3 \u2192 \u9875\u9762\u53ef\u4ea4\u4e92\u3002\u4f18\u5316\u7a97\u53e3\u4e3b\u8981\u5728 onCreate \u4e4b\u524d\u7684\u521d\u59cb\u5316\u4e0e\u9996\u5c4f\u5e03\u5c40\u3002<\/p>\n

    2. onCreate \u91cc\u6700\u9002\u5408\u505a\u4ec0\u4e48\u3001\u6700\u4e0d\u8be5\u505a\u4ec0\u4e48\uff1f<\/h3>\n

    \u53ea\u505a\uff1a\u8def\u7531\u53c2\u6570\u89e3\u6790\u3001\u9996\u5c4f\u5fc5\u9700\u6570\u636e\u51c6\u5907\u3002\u4e0d\u505a\uff1a\u975e\u9996\u5c4f SDK \u521d\u59cb\u5316\uff08\u632a\u5230\u9996\u5e27\u540e\u5f02\u6b65\uff09\u3001\u540c\u6b65 IO\u3001\u5927\u5bf9\u8c61\u89e3\u6790\u3002\u7528\u542f\u52a8\u4efb\u52a1\u7f16\u6392\uff08TaskPool + \u4f9d\u8d56\u56fe\uff09\u7ba1\u7406\u3002<\/p>\n

    3. \u542f\u52a8\u8017\u65f6\u600e\u4e48\u6d4b\uff1f<\/h3>\n

    Profiler \u7684 Launch \u6a21\u677f\u7ed9\u5206\u6bb5\u8017\u65f6\uff1b\u7ebf\u4e0a\u7528 HiLog \u6253\u70b9\uff08\u8fdb\u7a0b\u521b\u5efa \u2192 \u9996\u5e27\u5b8c\u6210\uff09\u4e0a\u62a5 p75\u3002\u4e24\u5957\u6570\u636e\u5bf9\u9f50\u770b\uff0c\u5b9e\u9a8c\u5ba4\u5b9a\u4f4d\u3001\u7ebf\u4e0a\u9a8c\u6536\u3002<\/p>\n

    4. \u9996\u5c4f\u52a0\u8f7d\u6162\u7684\u901a\u7528\u7ec4\u5408\u62f3\uff1f<\/h3>\n

    \u9996\u5c4f\u6570\u636e\u9884\u53d6\uff08AbilityStage \u9636\u6bb5\u53d1\u8bf7\u6c42\uff09+ \u5e03\u5c40\u7cbe\u7b80\uff08\u5c42\u7ea7\u6d45\u3001\u61d2\u52a0\u8f7d\u975e\u9996\u5c4f\u7ec4\u4ef6\uff09+ \u7f13\u5b58\u5feb\u7167\u5148\u6e32\u67d3 + \u9aa8\u67b6\u5c4f\u515c\u5e95\u3002<\/p>\n

    5. HSP\/HAR \u5bf9\u542f\u52a8\u6709\u4ec0\u4e48\u5f71\u54cd\uff1f<\/h3>\n

    \u5171\u4eab\u5305\u8d8a\u5927\u52a0\u8f7d\u8d8a\u91cd\uff0c\u975e\u9996\u5c4f\u80fd\u529b\u7684 HAR \u62c6\u51fa\u53bb\u6309\u9700\u52a0\u8f7d\uff1b\u52a8\u6001 HSP \u53ef\u5ef6\u8fdf\u52a0\u8f7d\u3002\u7b54\u9898\u8981\u70b9\uff1a\u6a21\u5757\u5316\u672c\u8eab\u5c31\u662f\u542f\u52a8\u4f18\u5316\u7684\u4e00\u90e8\u5206\u3002<\/p>\n

    \"\u9e3f\u8499\u6e32\u67d3\u6027\u80fd\u4e09\u5927\u53cd\u6a21\u5f0f\"
    <\/figcaption><\/figure>\n

    \u4e8c\u3001\u72b6\u6001\u7ba1\u7406\u4e0e\u6e32\u67d3\uff086 \u95ee\uff09<\/h2>\n

    6. \u72b6\u6001\u66f4\u65b0\u7c92\u5ea6\u600e\u4e48\u4f18\u5316\uff1f<\/h3>\n

    \u72b6\u6001\u62c6\u5230\u6700\u5c0f\u5fc5\u8981\u7c92\u5ea6\uff1a\u5217\u8868\u9879\u6570\u636e\u5404\u81ea\u7ba1\u7406\uff0c\u907f\u514d\u5927\u6570\u7ec4\u6574\u4f53 @State\uff1b\u4f9d\u8d56\u8be5\u72b6\u6001\u7684\u7ec4\u4ef6\u8d8a\u5c11\u8d8a\u597d\u3002\u56de\u7b54\u65f6\u7ed9\u51fa\u300c\u5927\u5bf9\u8c61 \u2192 \u62c6\u5b50\u7ec4\u4ef6\u300d\u7684\u5bf9\u7167\u4f8b\u5b50\u3002<\/p>\n

    7. @State\u3001@Prop\u3001@Link\u3001@ObjectLink \u600e\u4e48\u9009\uff1f<\/h3>\n

    @Prop \u503c\u62f7\u8d1d\uff08\u9002\u5408\u7b80\u5355\u503c\uff0c\u5927\u5bf9\u8c61\u5f00\u9500\u5927\uff09\uff1b@Link \u53cc\u5411\u540c\u6b65\uff1b@ObjectLink + @Observed \u5f15\u7528\u4f20\u9012\uff08\u5927\u5bf9\u8c61\/\u5d4c\u5957\u5bf9\u8c61\u9996\u9009\uff09\u3002\u9009\u578b\u9519\u8bef\u662f\u6e32\u67d3\u6027\u80fd\u95ee\u9898\u7684\u5934\u53f7\u6765\u6e90\u3002<\/p>\n

    8. build \u91cc\u5199\u91cd\u903b\u8f91\u4e3a\u4ec0\u4e48\u662f\u53cd\u6a21\u5f0f\uff1f<\/h3>\n

    build \u6bcf\u6b21\u72b6\u6001\u53d8\u66f4\u90fd\u4f1a\u6267\u884c\uff0c\u4efb\u4f55\u91cd\u6d3b\uff08\u683c\u5f0f\u5316\/\u89e3\u6790\/\u8fc7\u6ee4\uff09\u90fd\u4f1a\u88ab\u653e\u5927\u6267\u884c\u3002\u5bf9\u7b56\uff1a\u9884\u8ba1\u7b97\u3001TaskPool \u5f02\u6b65\u3001\u7f13\u5b58\u7ed3\u679c\u3002<\/p>\n

    9. \u4ec0\u4e48\u60c5\u51b5\u7528 @Watch\uff1f\u8981\u6ce8\u610f\u4ec0\u4e48\uff1f<\/h3>\n

    \u72b6\u6001\u53d8\u5316\u7684\u65c1\u8def\u76d1\u542c\uff08\u8054\u52a8\u66f4\u65b0\uff09\u3002\u6ce8\u610f\uff1a\u56de\u8c03\u91cc\u518d\u6539\u72b6\u6001\u53ef\u80fd\u89e6\u53d1\u5faa\u73af\u66f4\u65b0\uff0c\u8981\u6709\u7ec8\u6b62\u6761\u4ef6\uff1b\u9ad8\u9891\u53d8\u5316\u7684\u72b6\u6001\u4e0d\u9002\u5408 @Watch \u9010\u6b21\u54cd\u5e94\uff0c\u5e94\u8282\u6d41\u3002<\/p>\n

    10. \u7ec4\u4ef6\u590d\u7528\uff08@Reusable\uff09\u7684\u539f\u7406\u4e0e\u9002\u7528\u573a\u666f\uff1f<\/h3>\n

    \u6ed1\u51fa\u5c4f\u5e55\u7684\u7ec4\u4ef6\u5b9e\u4f8b\u56de\u6536\u8fdb\u590d\u7528\u6c60\uff0c\u6ed1\u5165\u65f6\u590d\u7528\u5e76\u66f4\u65b0\u6570\u636e\uff0c\u7701\u521b\u5efa\u9500\u6bc1\u5f00\u9500\u3002\u9002\u5408\u7ed3\u6784\u540c\u6784\u7684\u957f\u5217\u8868\u9879\uff1b\u7ed3\u6784\u5dee\u5f02\u5927\u7684\u7ec4\u4ef6\u590d\u7528\u6536\u76ca\u4f4e\u3002<\/p>\n

    11. \u4e00\u6b21\u6027\u5927\u53d8\u66f4\u600e\u4e48\u51cf\u5c11\u6e32\u67d3\u538b\u529b\uff1f<\/h3>\n

    \u6279\u91cf\u66f4\u65b0\u5408\u5e76\uff08\u4e00\u6b21\u4e8b\u52a1\u91cc\u6539\u591a\u4e2a\u72b6\u6001\uff0c\u6846\u67b6\u81ea\u52a8\u6279\u5904\u7406\uff09\u3001\u907f\u514d\u8fde\u73af @Watch \u7ea7\u8054\u3001\u7528 @Computed \u6d3e\u751f\u503c\u4ee3\u66ff\u624b\u52a8\u540c\u6b65\u591a\u4efd\u72b6\u6001\u3002<\/p>\n

    \u4e09\u3001\u5217\u8868\u4e0e\u6ed1\u52a8\uff085 \u95ee\uff09<\/h2>\n

    12. LazyForEach \u7684\u4e09\u4e2a\u5fc5\u8981\u6761\u4ef6\uff1f<\/h3>\n

    \u5fc5\u987b\u914d\u5408\u6570\u636e\u6e90\u7c7b\uff08\u5b9e\u73b0 IDataSource \u901a\u77e5\u673a\u5236\uff09\u3001\u952e\u503c\u751f\u6210\u51fd\u6570\u7a33\u5b9a\u552f\u4e00\u3001\u5728 List\/Grid\/Swiper \u5bb9\u5668\u5185\u4f7f\u7528\u3002\u666e\u901a ForEach \u662f\u5168\u91cf\u521b\u5efa\uff0c\u5217\u8868\u6027\u80fd\u7684\u5929\u82b1\u677f\u5c31\u5728\u8fd9\u3002<\/p>\n

    13. cachedCount \u600e\u4e48\u8bbe\u7f6e\uff1f<\/h3>\n

    \u5c4f\u5916\u9884\u52a0\u8f7d\u6761\u6570\uff1a\u592a\u5c0f\uff08\u6eda\u52a8\u767d\u5c4f\uff09\u4e0e\u592a\u5927\uff08\u521b\u5efa\u6d6a\u8d39\uff09\u90fd\u4e0d\u597d\uff0c\u9ed8\u8ba4\u503c\u57fa\u7840\u4e0a\u6309 item \u9ad8\u5ea6\u4e0e\u673a\u578b\u8c03\u4f18\uff0c\u914d\u5408\u6d41\u7545\u5ea6\u5b9e\u6d4b\u3002<\/p>\n

    14. \u957f\u5217\u8868\u6eda\u52a8\u4e22\u5e27\u7684\u6392\u67e5\u987a\u5e8f\uff1f<\/h3>\n

    \u5148\u786e\u8ba4 LazyForEach + \u590d\u7528\u751f\u6548 \u2192 \u770b item \u7ed1\u5b9a\u903b\u8f91\uff08\u6709\u6ca1\u6709 IO\/\u89e3\u6790\uff09\u2192 \u56fe\u7247\u89e3\u7801\u662f\u5426\u5f02\u6b65 + \u5c3a\u5bf8\u5339\u914d \u2192 \u6700\u540e\u7528 Profiler \u5e27\u5206\u6790\u770b\u5355\u5e27\u8017\u65f6\u6784\u6210\u3002<\/p>\n

    15. \u5d4c\u5957\u6ed1\u52a8\uff08List \u91cc\u5d4c Grid\uff09\u600e\u4e48\u4f18\u5316\uff1f<\/h3>\n

    \u907f\u514d\u6df1\u5c42\u5d4c\u5957\uff08\u5c42\u7ea7\u6bcf\u6df1\u4e00\u5c42\u5e03\u5c40\u5f00\u9500\u4e58\u4e00\u6b21\uff09\uff1b\u56fa\u5b9a item \u5c3a\u5bf8\u51cf\u5c11\u6d4b\u91cf\uff1b\u5d4c\u5957\u6eda\u52a8\u8054\u52a8\u7528\u7cfb\u7edf\u63d0\u4f9b\u7684\u5d4c\u5957\u6eda\u52a8\u9009\u9879\u800c\u4e0d\u662f\u624b\u52bf\u81ea\u5b9a\u4e49\u3002<\/p>\n

    16. \u56fe\u7247\u52a0\u8f7d\u7684\u6b63\u786e\u59ff\u52bf\uff1f<\/h3>\n

    \u5c3a\u5bf8\u5339\u914d\u663e\u793a\u533a\u57df\uff08\u6e90\u5934\u4e0b\u91c7\u6837\uff09\u3001\u5f02\u6b65\u89e3\u7801\u3001\u5217\u8868\u6ed1\u52a8\u4e2d\u6309\u9700\u53d6\u6d88\u4e0d\u5fc5\u8981\u52a0\u8f7d\u3001\u5408\u9002\u7684\u5185\u5b58\u7f13\u5b58\u7b56\u7565\u3002<\/p>\n

    \u56db\u3001\u5185\u5b58\u4e0e\u529f\u8017\uff084 \u95ee\uff09<\/h2>\n

    17. \u5185\u5b58\u95ee\u9898\u7684\u6838\u5fc3\u6307\u6807\u4e0e\u5de5\u5177\uff1f<\/h3>\n

    \u5185\u5b58\u6c34\u4f4d\u3001GC \u9891\u7387\u3001\u6cc4\u6f0f\u5bf9\u8c61\u589e\u957f\u66f2\u7ebf\u3002\u5de5\u5177\uff1aDevEco Profiler Memory \u6a21\u677f\u505a\u65f6\u5e8f\u5206\u6790\uff0c\u5feb\u7167\u5bf9\u6bd4\u627e\u6cc4\u6f0f\u3002<\/p>\n

    18. \u5e38\u89c1\u5185\u5b58\u6cc4\u6f0f\u573a\u666f\uff1f<\/h3>\n

    \u5168\u5c40\u5355\u4f8b\u6301\u6709\u9875\u9762\u7ea7\u5bf9\u8c61\u3001\u4e8b\u4ef6\u8ba2\u9605\u672a\u89e3\u7ed1\u3001@Watch \u56de\u8c03\u95ed\u5305\u6301\u6709\u5927\u5bf9\u8c61\u3001native \u5f15\u7528\u672a\u91ca\u653e\uff08NAPI \u573a\u666f\uff09\u3002\u6cbb\u7406\u624b\u6bb5\u540c\u79fb\u52a8\u7aef\u901a\u7528\uff1a\u751f\u547d\u5468\u671f\u5bf9\u9f50 + \u5feb\u7167 diff\u3002<\/p>\n

    19. \u529f\u8017\u4f18\u5316\u7684\u5173\u6ce8\u70b9\uff1f<\/h3>\n

    \u51cf\u5c11\u540e\u53f0\u6d3b\u8dc3\uff1a\u5b9a\u4f4d\/\u4f20\u611f\u5668\u7684\u91c7\u96c6\u9891\u7387\u6309\u9700\u964d\u7ea7\u3001\u7f51\u7edc\u6279\u91cf\u5408\u5e76\u3001\u52a8\u753b\u5728\u4e0d\u53ef\u89c1\u65f6\u6682\u505c\u3001\u540e\u53f0\u4efb\u52a1\u7528\u7cfb\u7edf\u8c03\u5ea6\u6258\u7ba1\u3002<\/p>\n

    20. \u9ad8\u5237\u5c4f\u9002\u914d\u8981\u6ce8\u610f\u4ec0\u4e48\uff1f<\/h3>\n

    \u5e27\u9884\u7b97\u4ece 16.7ms \u53d8 8.3ms\uff0c\u539f\u6765\u300c\u521a\u597d\u4e0d\u5361\u300d\u7684\u4ee3\u7801\u4f1a\u73b0\u5f62\uff1b\u6309\u573a\u666f\u7533\u8bf7\u5237\u65b0\u7387\uff08\u9759\u6001\u9875\u964d\u9891\u7701\u7535\uff0c\u6ed1\u52a8\u65f6\u9ad8\u5237\uff09\uff0c\u52a8\u753b\u5b9e\u73b0\u8d70\u7cfb\u7edf\u5c5e\u6027\u52a8\u753b\u800c\u975e\u5b9a\u65f6\u5668\u3002<\/p>\n

    \u4e94\u3001\u5de5\u5177\u94fe\u4e0e\u5ea6\u91cf\uff085 \u95ee\uff09<\/h2>\n

    21. DevEco Profiler \u7684\u5e38\u7528\u6a21\u677f\u6709\u54ea\u4e9b\uff1f<\/h3>\n

    Launch\uff08\u542f\u52a8\uff09\u3001CPU\uff08\u70ed\u70b9\u51fd\u6570\uff09\u3001Memory\uff08\u6c34\u4f4d\u4e0e\u6cc4\u6f0f\uff09\u3001Frame\uff08\u4e22\u5e27\u5206\u6790\uff09\u3001Time\/HiTrace\uff08\u8de8\u8fdb\u7a0b\u8c03\u7528\u94fe\uff09\u3002\u7b54\u9898\u65f6\u6309\u300c\u95ee\u9898\u7c7b\u578b \u2192 \u6a21\u677f\u300d\u5bf9\u7b54\u3002<\/p>\n

    22. \u600e\u4e48\u5efa\u7acb\u6027\u80fd\u57fa\u7ebf\u4e0e\u9632\u56de\u9000\u673a\u5236\uff1f<\/h3>\n

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    \n
    \u6807\u7b7e<\/div>\n

    #\u9e3f\u8499\u9762\u8bd5<\/span>#\u6027\u80fd\u4f18\u5316<\/span>#\u72b6\u6001\u7ba1\u7406<\/span>#ArkUI<\/span><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

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