Run results for: array.splice vs for loop - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/109.0

Browser: Firefox 109

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
array.splice	19065.2 Ops/sec
for loop	34687.3 Ops/sec
array.splice w/o spread	18237.1 Ops/sec

Website performance monitoring

Script Preparation code:

s = new Set();
a = [];
for (var i=0; i < 1000; i++) s.add(i*i);

Tests:

array.splice
a.splice(0, a.length, ...s.values());
for loop
a.length = 0; for (var x of s) a.push(x);
array.splice w/o spread
a.splice.apply(a, [0, a.length].concat(Array.from(s)));