function bigInt(a, b) {
    let c = a << b;
    return c + b;
}
noInline(bigInt);

for (let i = 0; i < 100000; i++) {
    bigInt(0b1111n, 0x100n);
}

let out;
for (let i = 0; i < 100000; i++) {
    out = bigInt(0xfffffffffffffffffffffffn, 10n);
}