C counter

#include <stdio.h>

int main() {
    int count = 0;

    for (int i = 0; i < 1000000000; i++) {
        count += 1;
        // Prevent the compiler from just optimizing the entire loop away.
        asm("");

        if (count % 100000000 == 0)
            printf(".", count);
    }

    return 0;
}

/*
$ gcc -O3 count.c -o count.exe && time ./count.exe
..........
real    0m0.523s
user    0m0.000s
sys     0m0.015s
*/

Python counter

count = 0

for i in range(1_000_000_000):
    count += 1
    if count % 100_000_000 == 0:
        print('.', end='')
        
# $ time python count.py
# ..........
# real    1m42.761s
# user    0m0.015s
# sys     0m0.000s