Really fast random numbers that take 20% of your CPU

#include <bits/stdc++.h>
using namespace std;

int main() {
    std::ios::sync_with_stdio(false);
    random_device rd;
    mt19937 mt(rd());
    uniform_int_distribution<> dist1(1, 500);
    uniform_int_distribution<> dist2(33, 125);
    while (true) {
        for (int i = 0; i < dist1(mt); ++i) {
            cout << dist2(mt);
        }
        cout << endl;
    }
}