Element Scan

scan.js

function timedGet(selector) { let start = performance.now(); let all = document.querySelectorAll(selector); let end = performance.now(); return { start, end, all }; }

function iterateAll(selector, cb) {
    let data = timedGet(selector);

    for (let e of data.all) cb(e);
    let end = performance.now();
    console.log({ start: data.start, iter: data.end, end, duration: end - data.start })
}
seen2 = new Set(); iterateAll('*', (e) => seen2.add(e));


function walk(element, cb) {
  cb(element);
  for (let e of element.children) walk(e, cb);
}
function walkAll(cb) {
    let start = performance.now();
    walk(document.body, cb);
    let end = performance.now();
    console.log({ start, end, duration: end - start });
}
seen = new Set(); walkAll((e) => seen.add(e));