Run results for: pop() vs shift() vs unshift vs pop - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:148.0) Gecko/20100101 Firefox/148.0

Browser: Firefox 148

Operating system: Linux

Device Platform: Desktop

Date tested: one month ago

Test name	Executions per second
pop	102963016.0 Ops/sec
shift	1583071616.0 Ops/sec
unshift	244.2 Ops/sec
push	1980.8 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(); }
unshift
let a = []; for(var i = 0; i < 100000; ++i) { a.unshift(i); }
push
let a = []; for(var i = 0; i < 100000; ++i) { a.push(i); }