มีใครเคยทดสอบ การเขียนโค๊ด รับ event ด้วยคำสั่ง onClick ในทุก object กับ event body onclick อันเดียวไหมครับ

document.addEventListener('click', function(e) {
    // do something.
});

var maximumLoop = 100000;


function runLoop() {
    const t0 = performance.now();

    let targetElement = document.getElementById('runResult');
    if (targetElement) {
        // reset result before start.
        targetElement.innerHTML = '';
    }

    for (i = 1; i <= maximumLoop; i++) {
        if (targetElement) {
            targetElement.insertAdjacentHTML('beforeend', i + ', ');
        }
        if (i%100 == 0) {
            if (targetElement) {
                targetElement.insertAdjacentHTML('beforeend', '<br>' + "\n");
            }
        }
    }// endfor;

    const t1 = performance.now();
    // https://developer.mozilla.org/en-US/docs/Web/API/Performance/now benchmark time original source code.
    console.log(`Call to this function took ${t1 - t0} milliseconds.`);
}


function runLoop2(event) {
    if (event.target.classList.contains('runLoop')) {
        const t0 = performance.now();

        let targetElement = document.getElementById('runResult');
        if (targetElement) {
            // reset result before start.
            targetElement.innerHTML = '';
        }

        for (i = 1; i <= maximumLoop; i++) {
            if (targetElement) {
                targetElement.insertAdjacentHTML('beforeend', i + ', ');
            }
            if (i%100 == 0) {
                if (targetElement) {
                    targetElement.insertAdjacentHTML('beforeend', '<br>' + "\n");
                }
            }
        }// endfor;

        const t1 = performance.now();
        // https://developer.mozilla.org/en-US/docs/Web/API/Performance/now benchmark time original source code.
        console.log(`Call to this function took ${t1 - t0} milliseconds.`);
    }
}


function listenEventDelegation() {
    document.addEventListener('click', function(event) {
        if (event.target.classList.contains('runLoop')) {
            runLoop();
        }
    });
}