Run results for: copy 3

Run details:

User agent: Mozilla/5.0 (Windows NT 5.1; rv:49.0) Gecko/20100101 Firefox/49.0

Browser: Firefox 49

Operating system: Windows XP

Device Platform: Other

Date tested: 8 years ago

Test name	Executions per second
slice	869147.9 Ops/sec
switch	40511452.0 Ops/sec

Script Preparation code:

var proto_slice = Array.prototype.slice;
var a = [1,2,3];

Tests:

slice
Array.prototype.slice.call(a)
switch
switch (a.length) { case 0: return []; case 1: return [a[0]]; case 2: return [a[0], a[1]]; case 3: return [a[0], a[1], a[2]]; case 4: return [a[0], a[1], a[2], a[3]]; case 5: return [a[0], a[1], a[2], a[3], a[4]]; default: return proto_slice.call(a); }