c++ - Affect on std::cout on performance of the program -

i have written program fetch file details , place them in sqlite database. in process have observed 2 scenarios:

scenario 1:

loop through each , every file , fill file details(path) in database(sqlite3).
while each file encountered,keep counter , print same via std::cout. time taken execute program:30mins

scenario 2:

time taken execute program:7mins

i unclear of why because of std::cout,the time taken 5 times more of not printing it?

any pointers on scenario highly appreciated.thanks lot.

regards, ravi

try use std::ios_base::sync_with_stdio(false), default std::cout sync stdio

And