这真的很简单。当您在源代码中进行更改时，您希望等待10分钟或20秒来构建它?我只能忍受20秒。除此之外，我要么拿出剑来，要么开始考虑如何使用单独的编译和链接将其带回舒适区。

在大量且越来越多的系统中，极端的静态链接可以对应用程序和系统性能产生巨大的积极影响。

我指的是通常所说的“嵌入式系统”，其中许多现在越来越多地使用通用操作系统，这些系统被用于所有可以想象到的事情。

An extremely common example are devices using GNU/Linux systems using Busybox. I've taken this to the extreme with NetBSD by building a bootable i386 (32-bit) system image that includes both a kernel and its root filesystem, the latter which contains a single static-linked (by crunchgen) binary with hard-links to all programs that itself contains all (well at last count 274) of the standard full-feature system programs (most except the toolchain), and it is less than 20 megabytes in size (and probably runs very comfortably in a system with only 64MB of memory (even with the root filesystem uncompressed and entirely in RAM), though I've been unable to find one so small to test it on).

It has been mentioned in earlier posts that the start-up time of a static-linked binaries is faster (and it can be a lot faster), but that is only part of the picture, especially when all object code is linked into the same file, and even more especially when the operating system supports demand paging of code direct from the executable file. In this ideal scenario the startup time of programs is literally negligible since almost all pages of code will already be in memory and be in use by the shell (and and init any other background processes that might be running), even if the requested program has not ever been run since boot since perhaps only one page of memory need be loaded to fulfill the runtime requirements of the program.

However that's still not the whole story. I also usually build and use the NetBSD operating system installs for my full development systems by static-linking all binaries. Even though this takes a tremendous amount more disk space (~6.6GB total for x86_64 with everything, including toolchain and X11 static-linked) (especially if one keeps full debug symbol tables available for all programs another ~2.5GB), the result still runs faster overall, and for some tasks even uses less memory than a typical dynamic-linked system that purports to share library code pages. Disk is cheap (even fast disk), and memory to cache frequently used disk files is also relatively cheap, but CPU cycles really are not, and paying the ld.so startup cost for every process that starts every time it starts will take hours and hours of CPU cycles away from tasks which require starting many processes, especially when the same programs are used over and over, such as compilers on a development system. Static-linked toolchain programs can reduce whole-OS multi-architecture build times for my systems by hours. I have yet to build the toolchain into my single crunchgen'ed binary, but I suspect when I do there will be more hours of build time saved because of the win for the CPU cache.

动态链接是满足某些许可要求(如LGPL)的唯一实用方法。

这真的很简单。当您在源代码中进行更改时，您希望等待10分钟或20秒来构建它?我只能忍受20秒。除此之外，我要么拿出剑来，要么开始考虑如何使用单独的编译和链接将其带回舒适区。

静态链接是在编译时将链接的内容复制到主二进制文件中并变成单个二进制文件的过程。

缺点:

编译时间更长 输出二进制更大

动态链接是在运行时加载链接内容的过程。这项技术允许:

升级链接二进制文件而不重新编译主二进制文件，增加ABI稳定性[关于] 是否有单个共享副本

缺点:

开始时间较慢(应复制链接内容) 链接器错误在运行时抛出

[iOS静态vs动态框架]

在类unix系统上，动态链接会使“root”很难使用安装在偏僻位置的共享库的应用程序。这是因为对于具有根权限的进程，动态连接器通常不会注意LD_LIBRARY_PATH或其等效内容。有时，静态链接可以解决问题。

另外，安装过程必须确定库的位置，但这可能会使计算机上的多个软件版本难以共存。