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

Run details:

User agent: Mozilla/5.0 (Linux; Android 12; Mi 10 Pro Build/SKQ1.220303.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/111.0.5563.116 Mobile Safari/537.36 XWEB/1110005 MMWEBSDK/20230805 MMWEBID/8538 MicroMessenger/8.0.42.2460(0x28002A58) WeChat/arm64 Weixin NetType/WIFI Language/zh_CN ABI/arm64

Browser: Chrome Mobile 111

Operating system: Android

Device Platform: Mobile

Date tested: 5 months ago

Test name	Executions per second
pop	11066120.0 Ops/sec
shift	11167510.0 Ops/sec
length	6215161.0 Ops/sec
reassignment	7270836.0 Ops/sec
.splice(0)	8574184.0 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)