为什么使用mkdir（）函数比使用系统（“ mkdir路径”）快得多？

Question

I am creating an application and I need to create multiple folders and creating folders are inside a go.

Gotta make the most optimized, then I realized that mkdir () is considerably faster than system ('mkdir path');

Does anyone know the reason?

Answer 1

system ("mkdir path"); calls a program mkdir , that is spawns a new process with all that it implies.

mkdir() just calls a system routine.

Answer 2

mkdir() calls the system call documented by man 2 mkdir . The function is run within the same process.

system('mkdir path') forks a new process which runs the mkdir command, documented by man 1 mkdir , which despite the same name is a separate command that provides a command-line interface to mkdir system call.

Answer 3

从shell调用mkdir产生大量开销（shell本身，产生新进程等 ），直到最终直接调用相同的内核代码mkdir()为止。