Advent of code (2020) - CODE 6 - 1

(async () => {
    const entries = (await(await fetch('https://adventofcode.com/2020/day/6/input')).text()).split('\n').map(item => item);
    const startTime = performance.now();
    let arr = [];
    let total = [];
    entries.forEach(item => {
        if (item.length > 0) {
            arr.push(Array.from(item).sort((a, b) => a > b ? 1 : -1));
        } else {
            const totalSet = new Set(arr.flat());
            total.push({ arr: totalSet, size: totalSet.size });
            arr = [];
        }
    });
    let recuento = 0;
    total.forEach(item => {
       console.log(item);
       recuento += item.size;
    });
    const endTime = performance.now();
    console.log(recuento, `${parseFloat(endTime - startTime).toFixed(4)} ms`);
})();