Run results for: asd as fasdfsdf d

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0

Browser: Firefox 81

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
1	12.0 Ops/sec
2	32.7 Ops/sec

Script Preparation code:

var tml = document.createElement("DIV");
for(let i = 0; i < 100000; i++) {
 	tml.append(document.createElement("DIV")); 
}

Tests:

1
var x = document.createElement("DIV"); for(let i = 0; i < 100000; i++) { x.append(document.createElement("DIV")); }
2
var y = document.createElement("DIV"); y.append(tml.cloneNode(true));