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@algernon
I have things

OG print10.c: 556ms

print10-gr.c:

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <sys/random.h>

#define ITERATIONS 100000000

int main() {
static char maze[ITERATIONS];

getrandom(maze, sizeof(maze), 0);

for (long i = 0; i < ITERATIONS; i++) {
maze[i] = maze[i] % 2 ? '/' : '\\';
}
write(1, maze, ITERATIONS);

return 0;
}

190ms

1/