Run results for: EventListener in parent vs EventListener in childs

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.71 Safari/537.36

Browser: Chrome 94

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Parent listener	773.2 Ops/sec
Child listeners	123.1 Ops/sec

HTML Preparation code:

<div id="parent">
    <div>a</div> <div>b</div> <div>c</div> <div>e</div> <div>f</div> <div>g</div> <div>h</div> <div>i</div> <div>j</div> <div>k</div>
    <div>a</div> <div>b</div> <div>c</div> <div>e</div> <div>f</div> <div>g</div> <div>h</div> <div>i</div> <div>j</div> <div>k</div> 
    <div>a</div> <div>b</div> <div>c</div> <div>e</div> <div>f</div> <div>g</div> <div>h</div> <div>i</div> <div>j</div> <div>k</div>
    <div>a</div> <div>b</div> <div>c</div> <div>e</div> <div>f</div> <div>g</div> <div>h</div> <div>i</div> <div>j</div> <div>k</div>
    <div>a</div> <div>b</div> <div>c</div> <div>e</div> <div>f</div> <div>g</div> <div>h</div> <div>i</div> <div>j</div> <div>k</div>
    <div>a</div> <div>b</div> <div>c</div> <div>e</div> <div>f</div> <div>g</div> <div>h</div> <div>i</div> <div>j</div> <div>k</div>
    <div>a</div> <div>b</div> <div>c</div> <div>e</div> <div>f</div> <div>g</div> <div>h</div> <div>i</div> <div>j</div> <div>k</div> 
    <div>a</div> <div>b</div> <div>c</div> <div>e</div> <div>f</div> <div>g</div> <div>h</div> <div>i</div> <div>j</div> <div>k</div>
    <div>a</div> <div>b</div> <div>c</div> <div>e</div> <div>f</div> <div>g</div> <div>h</div> <div>i</div> <div>j</div> <div>k</div>
    <div>a</div> <div>b</div> <div>c</div> <div>e</div> <div>f</div> <div>g</div> <div>h</div> <div>i</div> <div>j</div> <div>k</div>
</div>

Script Preparation code:

var parent = document.getElementById("parent");
var text ="";

Tests:

Parent listener
parent.addEventListener("click", (e)=>{ text = e.target.textContent; });
Child listeners
for(var children of parent.children){ children.addEventListener("click",(e)=>{ text = e.target.textContent; }) }

Run results for: EventListener in parent vs EventListener in childs

Parent listener

Child listeners