How to optimize cross-platform C++ program performance?

Removeunusedpackagesanddependencieswithsudoaptautoremove,cleanpackagecacheusingsudoaptcleanorautoclean,andremoveoldkernelsviasudoaptautoremove--purge.2.Clearsystemlogswithsudojournalctl--vacuum-time=7d,deletearchivedlogsin/var/log,andempty/tmpand/var

Systemdisthefirstprocess(PID1)inmodernLinuxsystems,replacingolderinitsystemslikeSysVinitandUpstart,responsibleforbooting,managingservices,devices,logs,andusersessionsthroughasuiteofintegratedtools.2.Itusesunitfiles(.service,.timer,.socket,etc.)todefi

In C, the method of passing parameters affects performance, security and modification of original data: use the value when passing basic types or when there is no modification, use the reference when large objects and when modifying, use the reference when reading large objects, and use const reference when reading large objects, avoid returning references to local variables to ensure efficiency and security.

To call C functions in C, you need to use extern "C" to prevent name modification. The specific steps are: 1. Write the C function header file hello.h and wrap extern "C" with #ifdef__cplusplus to ensure compatibility; 2. Implement the C function say_hello() and include the header file in the main program main.cpp of C; 3. Use g to compile the C file and link the C target file or directly compile the link; 4. Run the program to correctly output the results, indicating that the C function was called successfully. The whole process needs to ensure that the declaration and compilation method are correct, and the program can run normally and output "CallingCfunc

Solana is a high-performance blockchain project originated from the United States. With its advantages of high speed and low cost, it has developed rapidly in DeFi, NFT, GameFi and other fields. Its ecosystem relies on centralized and decentralized trading platforms to provide liquidity and trading support, especially in the DEX field. The core technology is a combination of historical proof (PoH) and proof of stake (PoS) to achieve high TPS and low fees, but network stability has been challenged many times.

Usetopforareal-timeoverviewofCPUusageandprocesses,whereCPUstatslikeuser,system,andidleareshownatthetopandcanbesortedbyCPUwithShift P;2.Usehtopforamoreuser-friendly,color-coded,andscrollableinterface,installableviasudoaptinstallhtoporsudodnfinstallhto

To list all files in the directory, it is recommended to use C 17's std::filesystem library, which is cross-platform and safe; for example, use std::filesystem::directory_iterator to traverse the directory and filter files through is_regular_file(). When compiling, -std=c 17 must be enabled; POSIX's opendir and readdir can be used with dirent.h implementation in Linux/macOS systems that do not support C 17; Windows APIs such as _findfirst and _findnext can be used on Windows; all three methods need to correctly handle errors

UseRAIItotieresourcemanagementtoobjectlifetimes,ensuringcleanupviadestructorsduringstackunwinding.2.Aimforstrongorno-throwexceptionsafetyguarantees,avoidingthebasicornoguaranteewhenpossible.3.Applythecopy-and-swapidiomtoachievethestrongguaranteebyper