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

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/110.0

Browser: Firefox 110

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
pop	105329688.0 Ops/sec
shift	792923648.0 Ops/sec
unshift	97.6 Ops/sec
push	895.3 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); }