Run results for: Last item in array slice/0 vs length - 1 vs slice/pop vs slice/shift - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:133.0) Gecko/20100101 Firefox/133.0

Browser: Firefox 133

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 3 months ago

Test name	Executions per second
slice/0	16502.3 Ops/sec
length - 1	632307.6 Ops/sec
slice/pop	16864.9 Ops/sec
slice/shift	13330.9 Ops/sec

Script Preparation code:

var arr = [];
for (let i = 0; i < 1000000; i++) {
  arr.push(i);
}

Tests:

slice/0
for (let i = 0; i < 1000; i++) { const v = arr.slice(-1)[0]; }
length - 1
for (let i = 0; i < 1000; i++) { const v = arr[arr.length - 1]; }
slice/pop
for (let i = 0; i < 1000; i++) { const v = arr.slice(-1).pop(); }
slice/shift
for (let i = 0; i < 1000; i++) { const v = arr.slice(-1).shift(); }