Run results for: clearing array via pop() vs shift() vs .length = 0 vs = []

Run details:

User agent: Mozilla/5.0 (Linux; Android 11; Mi Note 10 Build/RKQ1.200826.002; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/92.0.4515.159 Mobile Safari/537.36

Browser: Chrome Mobile 92

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
pop	4460272.0 Ops/sec
shift	4518574.0 Ops/sec
length	2642010.0 Ops/sec
reassignment	3518188.2 Ops/sec
.splice(0)	3382744.5 Ops/sec

Script Preparation code:

var array = [];

for(var i = 0; i < 100000; i++){array.push(Math.random());}

Tests:

pop
while (array.length > 0) { array.pop(); }
shift
while (array.length > 0) { array.shift(); }
length
array.length = 0
reassignment
array = []
.splice(0)
array.splice(0);

Run results for: clearing array via pop() vs shift() vs .length = 0 vs = []

pop

shift

length

reassignment

.splice(0)