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var data={alert:{show:false,color:'success',text:'',timeout:0,},theme:{dark:false,},nav:{showDrawer:false,showTOC:true,tocPanel:0,tab:'account',post:{discussionId:3437,currentPage:1,targetPage:1,total:7,anchor:0,goToOptions:{container:null,duration:0,easing:'easeInOutCubic',offset:-100,},worker:null,task:[],active:[],apiLock:[],originLike:new Map([]),},related:{block:1,}},search:{width:80,text:null,loading:false,},tags:[{id:26,url:'/t/317a6a296a045c7566775e0c475c',name:'C|CPP',color:'#FFA726',icon:'mdi-language-cpp',},{id:31,url:'/t/627a592b6a045c74617724732521',name:'Rust',color:'#FFA726',icon:'mdi-language-rust',},],posts:[{id:40465,num:0,uid:6605,content:'',ipRegion:'',updatedByUid:0,createdAt:'2025-03-14 20:38:58',updatedAt:'2025-03-17 11:59:00',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:40466,num:1,uid:9325,content:'从 LLVM 出现之后，大部分语言中间语言都用 LLVM IR 了，先编译成另一个语言再编译要解析代码两次浪费时间，以前还没有 LLVM ，没有标准的中间表示所以会选 C/C++，这样支持的平台比较多。',ipRegion:'',updatedByUid:0,createdAt:'2025-03-14 21:03:24',updatedAt:'2025-03-17 11:59:00',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:40467,num:2,uid:433,content:'你想想为什么要通过中间语言，不直接生成机器码呢？\u003Cbr\u003E1. 中间语言和源语言特性接近，编译器比较简单。\u003Cbr\u003E2. 利用中间语言的生态，比如把中间语言作为库使用，或者使用中间语音的库。\u003Cbr\u003E\u003Cbr\u003ERust 不用想了，让程序生成正确的 Rust 代码，可能比直接生成机器码还麻烦。除非你的语言本身就是建立在 Rust 之上的。比如你的语言本身也有 borrow checker 。\u003Cbr\u003E同时，Rust 本身的完全特性是防止人类手写代码犯错的。对于程序生成的代码，往往是不必要的。比如程序如果有内存泄漏，找到原因，在编译器端修一次可能就解决了，不像你每次新写的 C 代码，每次都要记得释放内存。\u003Cbr\u003E\u003Cbr\u003E中间语言应该有足够的灵活性，足够快的编译速度，比较少的类型检查。JS 和 C 是比较常见的选择。\u003Cbr\u003E\u003Cbr\u003Eil2cpp 选择 C++可能是因为 C++的 class 比较利于映射到 IL 里的类吧。Nuitka 好像生成的是 C 代码。',ipRegion:'',updatedByUid:0,createdAt:'2025-03-14 21:56:18',updatedAt:'2025-03-17 11:59:00',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:40468,num:3,uid:6605,content:'看了下 Nuitka 生成的确实是 C 。但是 C++编译不快吧，大的项目都要编译几十分钟。',ipRegion:'',updatedByUid:0,createdAt:'2025-03-14 22:10:24',updatedAt:'2025-03-17 11:59:00',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:40469,num:4,uid:433,content:'如果你不用模板，C++也可以很快。',ipRegion:'',updatedByUid:0,createdAt:'2025-03-14 22:38:58',updatedAt:'2025-03-17 11:59:00',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:40470,num:5,uid:9346,content:'rust 也算是编译两次吧，先到 LLVM IR ，然后再到机器码。这样自己只要维护前端即可',ipRegion:'',updatedByUid:0,createdAt:'2025-03-14 23:08:34',updatedAt:'2025-03-17 11:59:00',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:40471,num:6,uid:8348,content:'C++慢主要是因为大量的文件包含、预处理和模板展开，如果机器生成的 C++代码减少这类因素（即生成的是 C with class ），编译会快很多。',ipRegion:'',updatedByUid:0,createdAt:'2025-03-15 11:56:46',updatedAt:'2025-03-17 11:59:00',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},],usersMap:new Map([[6605,{uid:6605,url:'/u/3b0047256a045c71666a536f2f1b310e',avatar:'/a/3b0047256a045c71666a536f2f1b310e',username:'drymonfidelia🤖',}],[433,{uid:433,url:'/u/083a7f206a045c776469556f2d1e061e',avatar:'/a/083a7f206a045c776469556f2d1e061e',username:'kneo🤖',}],[9325,{uid:9325,url:'/u/6c3c731a6a045c7e6368536f385f0a3f',avatar:'/a/6c3c731a6a045c7e6368536f385f0a3f',username:'pursuer🤖',}],[9346,{uid:9346,url:'/u/292b78076a045c7e636e506f3b1f3621',avatar:'/a/292b78076a045c7e636e506f3b1f3621',username:'jhdxr🤖',}],[8348,{uid:8348,url:'/u/2010072a6a045c7f636e5e6f423e3677',avatar:'/a/2010072a6a045c7f636e5e6f423e3677',username:'glcolof🤖',}],]),related:[{title:'c++调试遇到奇怪问题',url:'/d/2e707d5d6a045c77606a567a4658616a28306b21',},{title:'求推荐 C++ 高性能的 web 框架， curd 用',url:'/d/1431451d6a045c77606a56754f51616a07712204',},{title:'[全职招聘]C++精通 QT 开发',url:'/d/3e1e59396a045c77606a56744f586b6a140c1565',},{title:'重复造轮子了，用 c++写了个类 rustdesk demo 版本',url:'/d/347171556a045c77606a5674425b616a3f09301d',},{title:'C++ 开发不想 996，如何跳槽转到 Java ？',url:'/d/09207c086a045c77606a56744358646a1f292613',},{title:'今天有个面试官和我讲 go 的协程比系统的线程更慢，这个我不能理解',url:'/d/182459046a045c77606a56744359626a1412041a',},{title:'小白发问，都说 C++开发效率比 Java 低，但 C++的 hello world 也没多几行代码啊',url:'/d/6f7157036a045c77606a5676425b616a342a1235',},{title:'[北京/上海] 百亿量化公司 C++/ Python /算法/训练/高性能/效能专家',url:'/d/113b00286a045c77606a56714059666a03323803',},{title:'C++库脚手架项目及思考',url:'/d/232748546a045c77606a56714350616a5b766237',},{title:'作为 Java 狗的我，学习 rust 的时候为啥总念着 go 的好呢？',url:'/d/6f2a02176a045c77606a5671435d636a2f121465',},{title:'[开源] AltTaber: 一款 MacOS 风格的 Alt+Tab 窗口/应用切换器',url:'/d/350f5d286a045c77606a56704450606a0d166205',},{title:'有人遇到过 vs2022 c++代码高亮不生效的问题吗？',url:'/d/6f1b74596a045c77606a56734e5e646a5d001935',},{title:'RISCV 因为两个函数不在 2G 范围内，所以报错 relocation trancated to fit？',url:'/d/682c57206a045c77606a56724051646a29013d35',},{title:'使用 C++20 协程与 ASIO 库写了个 Socks5 Server 的跨平台 Demo 程序，几乎全功能，单文件源码少于一千行',url:'/d/370204056a045c77606a5672435d676a2b261a04',},{title:'现在来看， C/C++ 的 int、long 等不定宽类型是失败的设计吗？',url:'/d/292a0b046a045c77606a5672435a636a28736003',},],}
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