CODEWITHSUNDEEP
c++linux
Michael Rodrigues
Michael Rodrigues

Reputation: 19

Why use the mkdir () function is much faster than using system ('mkdir path')?

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?

Upvotes: 0

Views: 826

Answers (3)

Paul Evans
Paul Evans

Reputation: 27577

Invoking mkdir from a shell has loads of overhead (the shell itself, spawning a new process, etc) till it finally calls the same kernel code mkdir() calls directly.

Upvotes: 0

chepner
chepner

Reputation: 531878

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.

Upvotes: 2

Anton Savin
Anton Savin

Reputation: 41321

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

mkdir() just calls a system routine.

Upvotes: 3

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