{"id":254444,"date":"2022-06-08T05:43:38","date_gmt":"2022-06-08T04:43:38","guid":{"rendered":"https:\/\/blog.jetbrains.com\/dotnet\/2022\/05\/23\/how-we-used-dotmemory-to-optimize-dotmemory\/"},"modified":"2022-06-10T08:31:59","modified_gmt":"2022-06-10T07:31:59","slug":"how-we-used-dotmemory-to-optimize-dotmemory","status":"publish","type":"dotnet","link":"https:\/\/blog.jetbrains.com\/zh-hans\/dotnet\/2022\/06\/08\/how-we-used-dotmemory-to-optimize-dotmemory\/","title":{"rendered":"\u6211\u4eec\u5982\u4f55\u4f7f\u7528 dotMemory \u4f18\u5316 dotMemory"},"content":{"rendered":"\n

dotMemory<\/a> \u662f JetBrains \u63a8\u51fa\u7684\u4e00\u6b3e .NET \u5185\u5b58\u5206\u6790\u5668\u3002 \u6211\u662f Ilya\uff0c\u6211\u534f\u52a9\u5f00\u53d1\u5de5\u5177\u3002<\/p>\n\n\n\n

\u6211\u8981\u8bb2\u4e00\u4e2a\u7ecf\u5178\u7684\u5185\u90e8\u6d4b\u8bd5\u6545\u4e8b\uff0c\u5728\u6545\u4e8b\u91cc\u6211\u4eec\u7528\u81ea\u5df1\u7684\u5de5\u5177 dotMemory \u548c dotTrace<\/a> \u4f18\u5316\u4e86 dotMemory \u7684\u4e00\u79cd\u7b97\u6cd5\u3002 \u6211\u4eec\u8fd8\u4f7f\u7528 dotTrace \u5bf9\u5176\u8fdb\u884c\u4e86\u66f4\u591a\u6539\u8fdb\uff0c\u5e76\u4f7f\u7528 BenchmarkDotNet<\/a> \u5b8c\u6210\u4e86\u4f18\u5316\u8fc7\u7a0b\u3002<\/p>\n\n\n\n

\u6211\u8981\u611f\u8c22 1<\/a> \u548c 2<\/a> \u8fd9\u4e24\u7bc7\u6587\u7ae0\u7684\u4f5c\u8005\uff0c\u4ed6\u4eec\u542f\u53d1\u4e86\u6211\u5206\u4eab\u8fd9\u4e2a\u6545\u4e8b\u3002<\/p>\n\n\n\n

\n\n\n\n

\u6700\u5f00\u59cb\uff0c\u4e00\u4f4d\u540c\u4e8b\u5728 Slack \u4e2d\u7ed9\u6211\u53d1\u9001\u6d88\u606f\uff0c\u544a\u8bc9\u6211\u4ed6\u5728 dotMemory \u7684\u652f\u914d\u6811<\/a>\u4e0a\u9047\u5230\u4e86\u95ee\u9898\u3002 \u6811\u7684\u6570\u636e\u8ba1\u7b97\u65f6\u95f4\u592a\u957f\u4e86\uff0c\u4ed6\u5b9e\u5728\u7b49\u4e0d\u5230\u8fdb\u7a0b\u7ed3\u675f\u3002 \u597d\u5728\u95ee\u9898\u662f\u5185\u90e8\u7684\uff0c\u6211\u4eec\u6536\u96c6\u5185\u5b58\u5feb\u7167\u5e76\u5c55\u5f00\u4e86\u8c03\u67e5\u3002<\/p>\n\n\n\n

\u5728\u672c\u5730\u673a\u5668\u4e0a\u91cd\u73b0\u95ee\u9898\u65f6\uff0c\u6211\u4eec\u53d1\u73b0\u5185\u5b58\u4f7f\u7528\u4ee5\u6bcf\u79d2 1.17 GB \u7684\u901f\u5ea6\u5feb\u901f\u589e\u957f\uff0c\u8feb\u4f7f\u8fdb\u7a0b\u5f00\u59cb\u4f7f\u7528\u4ea4\u6362\u6587\u4ef6\u3002 \u53d1\u751f\u8fd9\u79cd\u60c5\u51b5\u901a\u5e38\u5c31\u610f\u5473\u7740\u65e0\u6cd5\u5728\u5408\u7406\u7684\u65f6\u95f4\u8303\u56f4\u5185\u6536\u5230\u7ed3\u679c\u3002 \u63a5\u4e0b\u6765\uff0c\u8be5\u7528 dotMemory \u89e3\u51b3 dotMemory \u4e2d\u7684\u95ee\u9898\u4e86\u3002<\/p>\n\n\n\n

\u8fdb\u7a0b\u5b8c\u5168\u8017\u5c3d\u7269\u7406\u5185\u5b58\u540e\uff0c\u5feb\u7167\u4f1a\u96be\u4ee5\u6355\u83b7\uff0c \u751a\u81f3\u64cd\u4f5c\u7cfb\u7edf\u4e5f\u4e0d\u518d\u7a33\u5b9a\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u51b3\u5b9a\u5728\u5185\u5b58\u4f7f\u7528\u5f00\u59cb\u5feb\u901f\u589e\u957f\u65f6\u6355\u83b7\u5feb\u7167\uff0c\u4f46\u7269\u7406\u5185\u5b58\u8fd8\u6709\u4e00\u4e9b\u5269\u4f59\u3002 dotMemory \u63a7\u5236\u53f0\u5206\u6790\u5668<\/a>\u662f\u5b8c\u6210\u8fd9\u9879\u5de5\u4f5c\u7684\u6700\u4f73\u5de5\u5177\uff1a<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u6b64\u547d\u4ee4\u4ee5\u5206\u6790\u6a21\u5f0f\u542f\u52a8 dotMemory.UI.64.exe<\/code>\u3002 \u5b83\u4f1a\u5728\u201cprivate bytes\u201d\u91cf\u8fbe\u5230 20 GB \u65f6\u7acb\u5373\u6355\u83b7\u5feb\u7167\uff0c\u5e76\u5728\u5206\u6790\u5b8c\u6210\u540e\u5728 dotMemory \u4e2d\u6253\u5f00\u5feb\u7167\u3002 \u5728\u6211\u4eec\u7684\u60c5\u51b5\u4e2d\uff0c\u6211\u4eec\u4e0d\u5f97\u4e0d\u624b\u52a8\u505c\u6b62\u5206\u6790\uff08\u5426\u5219\u6211\u4eec\u6700\u7ec8\u4f1a\u518d\u6b21\u4ea4\u6362\uff09\u3002 \u6211\u4eec\u4e00\u76f4\u7b49\u5230\u6570\u636e\u8db3\u591f\uff0c\u7136\u540e\u6309 Ctrl+C<\/kbd>\u3002<\/p>\n\n\n\n

\u73b0\u5728\u6709\u4e86\u5feb\u7167\uff0c\u6211\u4eec\u5728 dotMemory \u4e2d\u5c06\u5176\u6253\u5f00\u3002 \u9996\u5148\uff0c\u5206\u6790\u652f\u914d\u6811 \u2013 \u6211\u7684\u540c\u4e8b\u65e0\u6cd5\u83b7\u5f97\u7684\u652f\u914d\u6811\uff0c\u6211\u5728\u5feb\u7167\u4e2d\u5f97\u5230\u4e86\uff1a<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u5185\u5b58\u4e2d\u5145\u65a5\u7740\u5927\u7ea6 6000 \u4e07\u4e2a CompactDominatorTreeNode+Builder<\/code> \u5bf9\u8c61\uff0c\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u5305\u542b\u4e00\u4e2a\u5b57\u5178\u3002 \u663e\u7136\uff0c\u5bf9\u4e8e\u5927\u591a\u6570\u5b57\u5178\u6765\u8bf4\uff0c\u5927\u5c0f < \u5bb9\u91cf\uff0c\u8fd9\u610f\u5473\u7740\u5927\u91cf\u5185\u5b58\u88ab\u6d6a\u8d39\u4e86\u3002<\/p>\n\n\n\n

\u6211\u4eec\u5fc5\u987b\u770b\u770b\u8fd9\u4e9b\u5b57\u5178\u7684\u7528\u9014\uff0c\u4e5f\u8bb8\u6211\u4eec\u4e0d\u9700\u8981\u8fd9\u4e48\u591a\uff1f \u6211\u9009\u62e9\u4e86 CompactDominatorTreeNode+Builder<\/code> \u8282\u70b9\u5e76\u5bfc\u822a\u5230\u5b83\u7684\u58f0\u660e\uff08\u4f7f\u7528\u4e0a\u4e0b\u6587\u83dc\u5355\u6216\u6309 Ctrl+L<\/kbd>\uff09\u3002 \u8fd9\u5c06\u6211\u5bfc\u822a\u5230\u6211\u7684 IDE (Rider<\/a>) \u5e76\u6253\u5f00\u4e86\u76f8\u5e94\u7684\u7c7b\u3002 \u8fd0\u884c Find Usages<\/a>\uff08\u67e5\u627e\u7528\u6cd5\uff09\u5c06\u6211\u5e26\u5230\u4e86 CompactDominatorTree.Build<\/code> \u65b9\u6cd5\uff0c\u5176\u4e2d\u5305\u542b\u652f\u914d\u6811\u538b\u7f29\u7b97\u6cd5\u3002<\/p>\n\n\n\n

\u4ecb\u7ecd\u4e00\u70b9\u80cc\u666f\uff1a\u9996\u5148\uff0cdotMemory \u6784\u5efa\u4e00\u4e2a\u652f\u914d\u6811\uff0c\u5982\u4e0b\u6240\u793a\u3002 \u5bf9\u4e8e\u6bcf\u4e2a\u5bf9\u8c61\uff0c\u5b83\u4f1a\u641c\u7d22\u4e13\u95e8\u4fdd\u7559\u5b83\u7684\u5bf9\u8c61\u5e76\u4fdd\u5b58\u8be5\u4fdd\u7559\u5bf9\u8c61\uff0c\u5982\u679c\u6ca1\u6709\uff0c\u5219\u4fdd\u5b58\u8868\u793a\u7f3a\u5c11\u6b64\u7c7b\u4fdd\u7559\u5bf9\u8c61\u7684\u6807\u8bb0\u3002 \u6811\u53ef\u80fd\u4f1a\u53d8\u5f97\u975e\u5e38\u5927\uff0c\u6ca1\u6709\u5fc5\u8981\u201c\u6309\u539f\u6837\u201d\u5411\u7528\u6237\u5c55\u793a\u3002 \u56e0\u6b64\uff0cdotMemory \u5728\u6811\u7684\u6bcf\u4e00\u7ea7\u6309\u5bf9\u8c61\u7c7b\u578b\u5bf9\u6811\u8282\u70b9\u8fdb\u884c\u5206\u7ec4\u3002 CompactDominatorTreeNode+Builder<\/code> \u8868\u793a\u6b63\u5728\u6784\u5efa\u7684\u7d27\u51d1\uff08\u538b\u7f29\uff09\u6811\u7684\u8282\u70b9\uff0c\u5b57\u5178\u7528\u4e8e\u6309\u7c7b\u578b\u5bf9\u8282\u70b9\u8fdb\u884c\u5206\u7ec4\u3002<\/p>\n\n\n\n

\u7b97\u6cd5\u4ee5\u201c\u4e0b\u7ea7\u2192\u4e0a\u7ea7\u201d\u683c\u5f0f\u63a5\u6536\u6811\uff0c\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u4e0e\u5176\u652f\u914d\u4e0a\u7ea7\u5339\u914d\u3002 \u5b83\u6309\u987a\u5e8f\u904d\u5386\u5feb\u7167\u4e2d\u7684\u6240\u6709\u5bf9\u8c61\u3002 \u6bcf\u6709\u4e00\u4e2a\u652f\u914d\u4e0a\u7ea7\u5c1a\u672a\u88ab\u5904\u7406\u7684\u5bf9\u8c61\uff0c\u7d27\u51d1\u6811\u4e2d\u5c31\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u7ec4\u8282\u70b9\u3002 \u5f53\u524d\u8282\u70b9\u6210\u4e3a\u7ec4\u8282\u70b9\u4e2d\u7684\u4e0b\u7ea7\u8282\u70b9\uff08\u73b0\u6709\u8282\u70b9\u6216\u65b0\u521b\u5efa\u7684\u8282\u70b9\uff09\u3002<\/p>\n\n\n\n

\u4f7f\u7528\u8fd9\u79cd\u65b9\u6cd5\uff0c\u6811\u4ee5\u4efb\u610f\u987a\u5e8f\u904d\u5386\uff0c\u6bcf\u4e2a\u8282\u70b9\u90fd\u5fc5\u987b\u5b58\u50a8\u4e00\u4e2a\u5b57\u5178\uff0c\u5b57\u5178\u6309\u7c7b\u578b\u5bf9\u8282\u70b9\u8fdb\u884c\u5206\u7ec4\u3002 \u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u8fd9\u90fd\u4e0d\u662f\u95ee\u9898\uff0c\u56e0\u4e3a\u7d27\u51d1\u6811\u6bd4\u5305\u542b\u6240\u6709\u5bf9\u8c61\u7684\u6811\u8981\u5c0f\u5f97\u591a\uff0c\u5e76\u4e14\u6ca1\u6709\u663e\u8457\u7684\u5185\u5b58\u8fc7\u5ea6\u4f7f\u7528\u3002 \u4f46\u662f\u8fd9\u4e2a\u5feb\u7167\u5c5e\u4e8e\u6781\u7aef\u60c5\u51b5\uff0c\u56e0\u4e3a\u5373\u4f7f\u662f\u7d27\u51d1\u7684\u6811\u4e5f\u5f88\u5927\u3002<\/p>\n\n\n\n

\u73b0\u5728\u7684\u95ee\u9898\u662f\uff0c\u201c\u6211\u4eec\u600e\u6837\u624d\u80fd\u4f7f\u7528\u66f4\u5c11\u7684\u5b57\u5178\uff1f\u201d\uff0c\u5982\u679c\u6211\u4eec\u53ea\u6709\u4e00\u4e2a\u5e26\u7ec4\u5408\u952e\u7684\u5b57\u5178\uff0c\u8be5\u600e\u4e48\u529e\uff1f \u8fd9\u5c06\u8feb\u4f7f\u6211\u4eec\u5fc5\u987b\u6267\u884c\u5206\u89e3\uff0c\u518d\u6b21\u5bfc\u81f4\u5185\u5b58\u8fc7\u5ea6\u4f7f\u7528\u6216\u66f4\u590d\u6742\u7684\u8ba1\u7b97\u3002 \u6211\u4eec\u4e0d\u5f97\u4e0d\u8003\u8651\u5176\u4ed6\u65b9\u6848\u3002<\/p>\n\n\n\n

\u6211\u4eec\u9000\u540e\u4e00\u6b65\uff0c\u66f4\u5168\u9762\u5730\u5206\u6790\u95ee\u9898\u3002 \u4f7f\u7528\u4e0d\u540c\u7684\u65b9\u5f0f\u904d\u5386\u6811\u5982\u4f55\uff1f\u6bd4\u5982\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22\uff1f \u8fd9\u79cd\u65b9\u5f0f\u770b\u8d77\u6765\u5f88\u53ef\u884c\u3002 \u4e00\u4e2a\u5177\u6709\u5e38\u89c4\u952e\u7684\u5b57\u5178\u5c31\u8db3\u591f\u4e86\u3002 \u8fd9\u6837\uff0c\u6bcf\u5f53\u6211\u4eec\u6784\u5efa\u5b8c\u6210\u7d27\u51d1\u6811\u7684\u65b0\u7ea7\u522b\uff0c\u6211\u4eec\u90fd\u4f1a\u6e05\u9664\u5b57\u5178\uff0c\u4ece\u800c\u53ef\u4ee5\u5728\u4e0b\u4e00\u6b21\u8fed\u4ee3\u4e2d\u91cd\u7528\u5b83\u3002<\/p>\n\n\n\n

\u4e0d\u8fc7\u6ce8\u610f\uff1a\u201c\u4e0b\u7ea7\u2192\u4e0a\u7ea7\u201d\u683c\u5f0f\u4e0d\u9002\u5408\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22\uff0c\u56e0\u4e3a\u68c0\u7d22\u7ed9\u5b9a\u8282\u70b9\u7684\u4e0b\u7ea7\u8282\u70b9\u7684\u8ba1\u7b97\u5f00\u9500\u8fc7\u5927\u3002 \u6211\u4eec\u9700\u8981\u4e0d\u540c\u7684\u8f93\u5165\u6811\u683c\u5f0f\u3002 \u597d\u5728\u6211\u4eec\u5df2\u7ecf\u6709\u4e86\u4e00\u4e2a\u5907\u9009\u65b9\u6848\uff1adotMemory \u4e5f\u80fd\u5c06\u652f\u914d\u6811\u5b58\u50a8\u4e3a\u201c\u4e0a\u7ea7\u2192\u4e0b\u7ea7\u201d\u90bb\u63a5\u5217\u8868\u3002 \u8fd9\u610f\u5473\u7740\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u4e0d\u589e\u52a0\u8ba1\u7b97\u590d\u6742\u6027\u7684\u60c5\u51b5\u4e0b\u66f4\u6539\u7b97\u6cd5\u4ee5\u4f7f\u7528\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22\u3002<\/p>\n\n\n\n

\u6211\u4eec\u8fdb\u884c\u4e86\u76f8\u5e94\u7f16\u8f91\u5e76\u8fd0\u884c\u3002 \u6211\u4eec\u770b\u5230\u5185\u5b58\u4f7f\u7528\u7684\u589e\u957f\u901f\u5ea6\u6bd4\u4ee5\u524d\u6162\u5f97\u591a\uff0c\u4ece\u6bcf\u79d2 1.17 GB \u53d8\u4e3a\u4ec5\u4ec5\u6bcf\u79d2 7 MB\uff0c\u4f46\u8be5\u8fdb\u7a0b\u4ecd\u7136\u672a\u80fd\u5b8c\u6210\u800c\u4e14\u518d\u6b21\u5f00\u59cb\u4f7f\u7528\u4ea4\u6362\u6587\u4ef6\u3002<\/p>\n\n\n\n

\u6211\u4eec\u56de\u5230\u7ed8\u56fe\u677f\u3002 \u6211\u4eec\u6355\u83b7\u4e86\u53e6\u4e00\u4e2a\u5feb\u7167\u5e76\u5c06\u5176\u6253\u5f00\u3002 \u65b0\u7684\u652f\u914d\u6811\u770b\u8d77\u6765\u50cf\u8fd9\u6837\uff1a<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u8fd9\u6b21\u4ec5\u7d27\u51d1\u6811\u5c31\u5360\u7528\u4e86 16 GB\u3002 \u8fd9\u4e2a\u5927\u5c0f\u5408\u7406\u5417\uff1f \u4e5f\u8bb8\u6211\u4eec\u8fd8\u53ef\u4ee5\u7528\u66f4\u7ecf\u6d4e\u7684\u65b9\u5f0f\u5b58\u50a8\u8fd9\u68f5\u6811\uff1f<\/p>\n\n\n\n

\u6211\u4eec\u6309\u7c7b\u578b\u5bf9\u8282\u70b9\u8fdb\u884c\u5206\u7ec4\u4ee5\u67e5\u627e\u6211\u4eec\u6709\u591a\u5c11\u4e2a\u8282\u70b9\uff1a<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u5728 16 GB \u7684\u603b\u5927\u5c0f\u4e2d\uff0c\u6811\u7684 9000 \u4e07\u4e2a\u8282\u70b9\u4ec5\u5360\u7528 6 GB\u3002 \u8fd9\u6709\u4e9b\u53ef\u7591\u3002 \u6211\u4eec\u5bfc\u822a\u5230 CompactDominatorTree2+Node<\/code> \u58f0\u660e\u7684\u4ee3\u7801\uff1a<\/p>\n\n\n\n

public sealed class Node\n{\n  public DfsNumber DfsNumber { get; }      \/\/ 8 bytes\n  public TypeId ObjectsType { get; }       \/\/ 4 bytes\n  public int ObjectsCount { get; }         \/\/ 4 bytes\n  public int RetainedObjectsCount { get; } \/\/ 4 bytes\n  public ulong RetainedBytes { get; }      \/\/ 8 bytes\n  public bool IsContainedInSet { get; }    \/\/ 1 byte\n\n  public Node Parent { get; }              \/\/ 8 bytes\n  internal JetArray<Node> ChildrenImpl { get; } \/\/ 8 bytes\n  \n  \/\/ we have omitted unnecessary details\n}<\/pre>\n\n\n\n
\u8fd9\u91cc\u7684\u6709\u6548\u8d1f\u8f7d\u53ea\u6709 45 \u5b57\u8282\uff0c\u4f46\u52a0\u4e0a\u6807\u9898\u548c\u5bf9\u9f50\uff0c\u4e00\u4e2a Node \u5bf9\u8c61\u5c31\u5360\u7528\u4e86 72 \u5b57\u8282\u3002 \u5b83\u4fdd\u7559\u7684\u66f4\u591a\uff0c\u5e73\u5747 192 \u5b57\u8282\u3002 \u4e3a\u4e86\u67e5\u770b\u8be6\u7ec6\u4fe1\u606f\uff0c\u6211\u4eec\u5207\u6362\u5230 Instances\uff08\u5b9e\u4f8b\uff09\u9009\u9879\u5361\uff0c\u4f7f\u7528\u67e5\u8be2 CompactDominatorTree2+Node !g !a<\/code> \u7b5b\u9009\u5185\u5bb9\uff08!g<\/code> \u6392\u9664\u6cdb\u578b\uff0c!a<\/code> \u6392\u9664\u6570\u7ec4\uff09\u3002 \u8fd9\u662f\u4e00\u4e2a\u968f\u673a\u5b9e\u4f8b\uff1a<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u5b9e\u4f8b\u8be6\u60c5\uff1a<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u8fd9\u53ef\u662f\u597d\u4e9b\u5f00\u9500\u3002<\/p>\n\n\n\n
\u73b0\u5728\uff0c\u6211\u4eec\u53ef\u4ee5\u6e05\u695a\u5730\u770b\u5230 JetMutableArray<\/code> \u5e76\u4e0d\u662f\u4e3a\u5927\u578b\u6811\u5b58\u50a8\u4e0b\u7ea7\u8282\u70b9\u7684\u6700\u6709\u6548\u65b9\u5f0f\u3002 \u6211\u4eec\u60f3\u5230\u7684\u7b2c\u4e00\u4e2a\u89e3\u51b3\u65b9\u6848\u5f53\u7136\u662f\u4f18\u5316\u4e0b\u7ea7\u8282\u70b9\u7684\u5b58\u50a8\u3002 \u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u5b83\u4eec\u5b58\u50a8\u5728\u6807\u51c6\u6570\u7ec4\u4e2d\u3002 \u4f46\u6211\u4eec\u9009\u62e9\u4e86\u4e00\u6761\u66f4\u6fc0\u8fdb\u7684\u9053\u8def\u3002<\/p>\n\n\n\n
\u5927\u578b\u6570\u636e\u7ed3\u6784\u5728 dotMemory \u4e2d\u5f88\u5e38\u89c1\u3002 \u4f8b\u5982\uff0c\u5bf9\u8c61\u56fe\u88ab\u5b58\u50a8\u4e3a\u90bb\u63a5\u5217\u8868\uff0c\u4f7f\u7528\u4e24\u4e2a\u901a\u8fc7\u6574\u6570\u6570\u7ec4\u7d22\u5f15\u76f8\u4e92\u5f15\u7528\u7684\u7ed3\u6784\u6570\u7ec4\u3002 \u8fd9\u5f88\u6709\u8da3\uff0c\u56e0\u4e3a\u5728 dotMemory \u4e2d\uff0c\u6211\u4eec\u521a\u521a\u505c\u6b62\u4f7f\u7528\u6258\u7ba1\u6570\u7ec4\u800c\u8f6c\u79fb\u5230\u6211\u4eec\u81ea\u5df1\u7684\u57fa\u4e8e\u5185\u5b58\u6620\u5c04\u6587\u4ef6\u7684\u5b9e\u73b0\u3002 \u8fd9\u6709\u52a9\u4e8e\u6211\u4eec\u5728\u8bbf\u95ee\u5143\u7d20\u65f6\u5b9e\u73b0\u6700\u5c0f\u5f00\u9500\uff08C \u4e2d\u7684\u539f\u751f\u5185\u5b58\u7d22\u5f15\u5f62\u5f0f\uff09\uff0c\u4ee5\u53ca\u52a0\u8f7d\u548c\u4fdd\u5b58\u6570\u7ec4\u7684\u5feb\u901f\u65b9\u5f0f\uff08\u5b8c\u5168\u5728\u64cd\u4f5c\u7cfb\u7edf\u7ea7\u522b\uff09\uff0c\u5e76\u4e14\u5728\u5e8f\u5217\u5316\/\u53cd\u5e8f\u5217\u5316\u65f6\u6ca1\u6709\u5f00\u9500\u3002 \u53e6\u5916\uff0c\u5373\u4f7f\u6ca1\u6709\u6211\u4eec\u7684\u53c2\u4e0e\uff0c\u8fd9\u4e9b\u6570\u7ec4\u7684\u7247\u6bb5\u4e5f\u53ef\u4ee5\u4ece\u5185\u5b58\u4e2d\u5378\u8f7d\uff0c\u5e2e\u52a9\u6211\u4eec\u5728\u987a\u5e8f\u904d\u5386\u6570\u7ec4\u65f6\u91ca\u653e\u7269\u7406\u5185\u5b58\u3002<\/p>\n\n\n\n
\u6211\u4eec\u51b3\u5b9a\u5728\u7d27\u51d1\u652f\u914d\u6811\u4e0a\u4f7f\u7528\u76f8\u540c\u7684\u65b9\u5f0f\u3002 \u6211\u4eec\u8fd8\u5c06 IsContainedInSet<\/code> \u7279\u6027\u53d8\u6210\u4e86\u4e00\u4e2a\u4f4d\u6807\u5fd7\uff0c\u5e76\u6d88\u9664\u4e86\u6ca1\u6709\u4f7f\u7528\u7684 Parent<\/code> \u5c5e\u6027\u3002 \u6700\u540e\uff0c\u6211\u4eec\u4e3a\u6811\u8282\u70b9\u5f97\u5230\u4e86\u4ee5\u4e0b\u7ed3\u6784\uff1a<\/p>\n\n\n\n
[StructLayout(LayoutKind.Sequential, Pack = 4)]\npublic readonly struct Node\n{\n  public readonly TypeId ObjectsType;\n\n  private readonly uint _objectsCount;\n  public int ObjectsCount => (int)(_objectsCount & 0x7FFFFFFF);\n  public bool IsContainedInSet => (_objectsCount & 0x80000000) != 0;\n\n  public readonly int RetainedObjectsCount;\n  public readonly ulong RetainedBytes; \n  public readonly DfsNumber DfsEnter;\n\n  public readonly Range<uint> Children;\n}<\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u901a\u8fc7\u8fd9\u79cd\u987a\u5e8f\u8868\u793a\uff0c\u6211\u4eec\u751a\u81f3\u53ef\u4ee5\u53ea\u4f7f\u7528\u4e00\u4e2a\u6307\u5411\u4e0b\u7ea7\u8282\u70b9\u7684\u6574\u6570\u94fe\u63a5\u3002\u00a0\u4e0d\u8fc7\uff0c\u6211\u4eec\u4f7f\u7528\u4e86\u4e00\u4e2a\u8303\u56f4\uff0c\u8be5\u8303\u56f4\u5141\u8bb8\u6211\u4eec\u6309\u00a0RetainedBytes<\/code>\u00a0\u5347\u5e8f\u5bf9\u6784\u5efa\u6811\u7684\u4e0b\u7ea7\u8282\u70b9\u8fdb\u884c\u6392\u5e8f\u4ee5\u5e2e\u52a9\u6211\u4eec\u6784\u5efa\u65ed\u65e5\u56fe\u3002\u00a0\u5bf9\u4e8e\u4e0a\u9762\u663e\u793a\u7684\u8868\u793a\uff0c\u8282\u70b9 #1\u3001#2 \u548c #3 \u7684\u987a\u5e8f\u53ef\u80fd\u4f1a\u6539\u53d8\u3002<\/p>\n\n\n\n
\u6211\u4eec\u5c4f\u4f4f\u547c\u5438\uff0c\u8fd0\u884c\u4e86\u7a0b\u5e8f\u3002 \u6210\u4e86\uff01 \u5185\u5b58\u4f7f\u7528\u5cf0\u503c\u4ec5\u4e3a 12 GB\u3002 \u652f\u914d\u6811\u6210\u529f\u6784\u5efa\uff0c\u8017\u65f6 55 \u5206\u949f \u2013 \u4ecd\u7136\u6bd4\u6211\u4eec\u671f\u671b\u7684\u8981\u957f\uff0c\u4f46\u53ef\u4ee5\u63a5\u53d7\u3002 \u5feb\u7167\u73b0\u5728\u603b\u5171\u5305\u542b 2.75 \u4ebf\u4e2a\u5bf9\u8c61\uff0c\u7d27\u51d1\u6811\u5305\u542b 2 \u4ebf\u4e2a\u8282\u70b9\u3002<\/p>\n\n\n\n
\u8fd9\u663e\u7136\u662f\u4e00\u4e2a\u597d\u7ed3\u679c\u3002 \u6211\u4eec\u4e00\u5f00\u59cb\u65e0\u6cd5\u5c06\u5927\u5c0f\u964d\u81f3 32 GB \u4ee5\u4e0b\uff0c\u8ba1\u7b97\u9700\u8981\u5f88\u957f\u65f6\u95f4\uff0c\u73b0\u5728\uff0c\u5b83\u5df2\u7ecf\u964d\u5230 12 GB \u5e76\u80fd\u5728 55 \u5206\u949f\u5185\u5c31\u7eea\u3002 \u7136\u800c\uff0c\u6211\u4eec\u8fd8\u662f\u611f\u89c9\u6211\u4eec\u53ef\u4ee5\u505a\u5f97\u66f4\u597d\u3002 55 \u5206\u949f\u7edd\u5bf9\u7b97\u4e0d\u4e0a\u7406\u60f3\u3002 \u6211\u4eec\u51b3\u5b9a\u67e5\u660e\u8fd9\u4e9b\u65f6\u95f4\u90fd\u7528\u5728\u4e86\u54ea\u91cc\u3002 \u8fdb\u5165 dotTrace\uff1a<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u597d\u5728\u6211\u4eec\u4e0d\u9700\u8981\u7b49\u5f85\u8fdb\u7a0b\u5b8c\u6210\uff0c\u8bb0\u5f55\u51e0\u5206\u949f\u7684\u6027\u80fd\u5c31\u8db3\u591f\u4e86\u3002 \u6211\u4eec\u4f7f\u7528 --timeout=3m<\/code> \u952e\u5728 3 \u5206\u949f\u540e\u81ea\u52a8\u505c\u6b62\u5206\u6790\u3002 \u6211\u4eec\u6253\u5f00\u5feb\u7167\uff0c\u5e94\u7528\u7b5b\u9009\u4ee5\u8bc6\u522b\u6b63\u5728\u6267\u884c\u6211\u4eec\u4efb\u52a1\u7684\u7ebf\u7a0b\uff0c\u8fd9\u662f\u957f\u65f6\u95f4\u4fdd\u6301\u5b8c\u5168\u52a0\u8f7d\u7684\u7ebf\u7a0b\u3002 \u8c03\u7528\u6811\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u4ee4\u4eba\u9707\u60ca\u7684\u662f\uff0c92% \u7684\u65f6\u95f4\u663e\u7136\u90fd\u88ab Dictionary.Clear<\/code> \u5360\u7528\u4e86\uff01 \u6211\u4eec\u7b80\u76f4\u4e0d\u6562\u76f8\u4fe1\u3002 Clear<\/code> \u5728\u6807\u51c6\u5e93\u5b57\u5178\u4e0a\u600e\u4e48\u4f1a\u8868\u73b0\u5f97\u5982\u6b64\u7cdf\u7cd5\uff1f \u539f\u6765\uff0c\u95ee\u9898\u662f\u5b57\u5178\u5728\u7b97\u6cd5\u7684\u7b2c\u4e00\u6b21\u8fed\u4ee3\u4e2d\u5df2\u7ecf\u81a8\u80c0\u5230\u4e86 22K \u7684\u5de8\u5927\u5143\u7d20\uff0c\u800c\u968f\u540e\u7684\u8fed\u4ee3\u901a\u5e38\u53ea\u6d89\u53ca\u51e0\u5341\u4e2a\u5143\u7d20\u3002 Dictionary.Clear<\/code> \u7684\u8ba1\u7b97\u590d\u6742\u5ea6\u4e0e Capacity<\/code>\uff08\u4e0d\u662fCount<\/code>\uff09\u6210\u6b63\u6bd4\uff0c\u7279\u522b\u662f buckets.Length<\/code>\uff0c\u5b83\u4e0e Capacity<\/code> \u6210\u7ebf\u6027\u5173\u7cfb\u3002 \u8fd9\u610f\u5473\u7740\u6211\u4eec\u5728\u4e0d\u65ad\u6e05\u9664\u7a7a\u5143\u7d20\uff01 \u4e8b\u5b9e\u8bc1\u660e\uff0c\u9009\u62e9\u6e05\u9664\u548c\u91cd\u7528\u5b57\u5178\u65f6\uff0c\u6211\u4eec\u5bf9\u6a21\u578b\u8fdb\u884c\u4e86\u8fc7\u591a\u7684\u4f18\u5316\u3002 <\/p>\n\n\n\n
\u518d\u9000\u4e00\u6b65\uff0c\u6211\u4eec\u73b0\u5728\u5c1d\u8bd5\u4e86\u6700\u76f4\u63a5\u7684\u65b9\u5f0f \u2013 \u4e3a\u6bcf\u6b21\u8fed\u4ee3\u521b\u5efa\u4e00\u4e2a\u65b0\u5b57\u5178\u3002 \u6211\u4eec\u518d\u6b21\u542f\u52a8\u79d2\u8868\uff0c\u8fd0\u884c\u4ee3\u7801\uff0c\u8fd9\u6b21\u5145\u6ee1\u671f\u5f85\u3002 \u54c7\uff01 1 \u5206 46 \u79d2\uff01 \u5783\u573e\u56de\u6536\u5668\u4e0a\u7684\u8d1f\u8f7d\u589e\u52a0\u4e86\uff0c\u4f46\u5b83\u5206\u5e03\u5747\u5300\u5e76\u4e14\u7ba1\u7406\u826f\u597d\uff0c\u6211\u4eec\u4f7f\u7528 dotTrace \u9a8c\u8bc1\u4e86\u8fd9\u4e00\u4e8b\u5b9e\u3002\u5c31\u662f\u8fd9\u6837\u3002 \u6211\u4eec\u5728\u4e0d\u5230 2 \u5206\u949f\u7684\u65f6\u95f4\u5185\u5904\u7406\u4e86 2.75 \u4ebf\u4e2a\u5bf9\u8c61\uff0c\u5185\u5b58\u4f7f\u7528\u5cf0\u503c\u4ec5\u4e3a 12 GB\u3002 \u6211\u4eec\u76f8\u5f53\u9ad8\u5174\uff0c\u51c6\u5907\u597d\u5c06\u4f18\u5316\u7684\u4ee3\u7801\u63d0\u4ea4\u5230\u4ed3\u5e93\u3002<\/p>\n\n\n\n
\u540e\u6765\uff0c\u6211\u4eec\u51b3\u5b9a\u518d\u505a\u4e00\u6b21\u6d4b\u8bd5\u3002 \u6211\u4eec\u5728\u4e0d\u540c\u7684\u5feb\u7167\u4e0a\u8fd0\u884c\u4e86\u65e7\u7b97\u6cd5\u548c\u65b0\u7b97\u6cd5\uff0c\u6bd4\u8f83\u6027\u80fd\u3002 \u6211\u4eec\u627e\u5230\u4e86\u4e00\u4e2a\u5927\u5c0f\u76f8\u540c\u4f46\u62d3\u6251\u4e0d\u540c\u7684\u5feb\u7167\uff0c\u65e7\u7b97\u6cd5\u4e5f\u53ef\u4ee5\u5904\u7406\uff0c\u7136\u540e\u628a\u5b83\u9988\u9001\u7ed9\u4e24\u79cd\u7b97\u6cd5\u3002 \u4ee4\u6211\u4eec\u5927\u5403\u4e00\u60ca\u7684\u662f\uff0c\u65b0\u7b97\u6cd5\u6bd4\u65e7\u7b97\u6cd5\u6162\u4e86 33%\uff0c\u5c3d\u7ba1\u8ba1\u7b97\u590d\u6742\u5ea6\u6ca1\u6709\u53d8\u5316\u3002 \u4f46\u8fd9\u5c31\u662f\u53e6\u4e00\u4e2a\u6545\u4e8b\u4e86\uff0c\u6211\u4eec\u4ee5\u540e\u518d\u8bb2\u3002 \u5982\u679c\u60a8\u6709\u5174\u8da3\uff0c\u8bf7\u5728\u4e0b\u65b9\u7559\u8a00\u6216\u76f4\u63a5\u8054\u7cfb\u6211\u4eec\uff01<\/p>\n\n\n\n
<\/i>\u4e0b\u8f7d DOTMEMORY<\/a><\/p>\n\n\n\n
<\/p>\n\n\n\n
\u672c\u535a\u6587\u82f1\u6587\u539f\u4f5c\u8005\uff1a<\/p>\n\n\n    
\n        
\n            
\n                
\n                    \"\"\n                <\/div>\n                
\n                                                        <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n","protected":false},"author":1297,"featured_media":243264,"comment_status":"closed","ping_status":"closed","template":"","categories":[4992,6659,4786,4788],"tags":[20,1888,366,1717],"cross-post-tag":[],"acf":[],"_links":{"self":[{"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/dotnet\/254444"}],"collection":[{"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/dotnet"}],"about":[{"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/types\/dotnet"}],"author":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/users\/1297"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/comments?post=254444"}],"version-history":[{"count":7,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/dotnet\/254444\/revisions"}],"predecessor-version":[{"id":255511,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/dotnet\/254444\/revisions\/255511"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/media\/243264"}],"wp:attachment":[{"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/media?parent=254444"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/categories?post=254444"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/tags?post=254444"},{"taxonomy":"cross-post-tag","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/cross-post-tag?post=254444"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}