Stability of Array.sort in different browsers

Question

Array.sort Sort stability in different browsers

This is an old question, I think it would be useful if we collect the latest data here. Click this script

http://jsfiddle.net/Wrt9R/

and share your results.

Script code:

a = [] for(var i = 0; i < 1000; i++) { a.push({'key':100 + Math.round(Math.random() * 100), 'val': i + 1000 }) } a.sort(function(x, y) { return x.key - y.key }) b = [] for(var i = 0; i < 1000; i++) { b.push(a[i].key * 10000 + a[i].val); } c = b.slice(0) b.sort() stable = (b.join() === c.join()) document.body.innerHTML = navigator.userAgent.toString() + "<br>" + (stable ? "stable": "UNSTABLE") 

Answer 1

  Stability Browser OS full UA string

 unstable Safari 5.3 OS X Lion (10.7.5) Mozilla / 5.0 (Macintosh; Intel Mac OS X 10_7_5) AppleWebKit / 536.29.13 (KHTML, like Gecko) Version / 6.0.4 Safari / 536.29.13
 stable Firefox 15.0.1 OS X Lion Mozilla / 5.0 (Macintosh; Intel Mac OS X 10.7; rv: 15.0) Gecko / 20100101 Firefox / 15.0.1
 unstable Chrome 21 OS X Lion (10.7.5) Mozilla / 5.0 (Macintosh; Intel Mac OS X 10_7_5) AppleWebKit / 537.1 (KHTML, like Gecko) Chrome / 21.0.1180.79 Safari / 537.1
 stable Firefox 16 Win 7 Mozilla / 5.0 (Windows NT 6.1; rv: 16.0) Gecko / 20100101 Firefox / 16.0
 unstable Chrome 26 Win 7 x64 Mozilla / 5.0 (Windows NT 6.1; WOW64) AppleWebKit / 537.31 (KHTML, like Gecko) Chrome / 26.0.1410.64 Safari / 537.31
 unstable IE 9.0 Win 7 x64 Mozilla / 5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident / 5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; InfoPath.3; .NET4.0E)
 stable Firefox 20 Win 7 x64 Mozilla / 5.0 (Windows NT 6.1; WOW64; rv: 20.0) Gecko / 20100101 Firefox / 20.0
 unstable IE 10 Win 7 Mozilla / 5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident / 6.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; InfoPath.3;. NET4.0C; .NET4.0E)
 unstable Chrome 26 Win 7 Mozilla / 5.0 (Windows NT 6.1) AppleWebKit / 537.31 (KHTML, like Gecko) Chrome / 26.0.1410.64 Safari / 537.31
 stable Firefox 20 Win 8 x64 Mozilla / 5.0 (Windows NT 6.2; WOW64; rv: 20.0) Gecko / 20100101 Firefox / 20.0
 unstable IE 10 Win 8 x64 Mozilla / 5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident / 6.0; .NET4.0E; .NET4.0C; .NET CLR 3.5.30729; .NET CLR 2.0.50727;. NET CLR 3.0.30729; Tablet PC 2.0)
 unstable Chrome 26 Win 8 x64 Mozilla / 5.0 (Windows NT 6.2; WOW64) AppleWebKit / 537.31 (KHTML, like Gecko) Chrome / 26.0.1410.64 Safari / 537.31
 unstable Opera 12.15 Win 8 x64 Opera / 9.80 (Windows NT 6.2; WOW64) Presto / 2.12.388 Version / 12.15
 stable Firefox 20 Ubuntu Mozilla / 5.0 (X11; Ubuntu; Linux x86_64; rv: 20.0) Gecko / 20100101 Firefox / 20.0
 unstable Chrome 26 Mozilla / 5.0 (X11; Linux x86_64) AppleWebKit / 537.31 (KHTML, like Gecko) Chrome / 26.0.1410.63 Safari / 537.31
 unstable Chrome 20 Win 7 x64 Mozilla / 5.0 (Windows NT 6.1; WOW64) AppleWebKit / 536.11 (KHTML, like Gecko) Chrome / 20.0.1132.57 Safari / 536.11
 unstable Chrome 28 Win 8 x64 Mozilla / 5.0 (Windows NT 6.2; WOW64) AppleWebKit / 537.36 (KHTML, like Gecko) Chrome / 28.0.1500.72 Safari / 537.36

Answer 2

Mozilla / 5.0 (Windows NT 6.1; WOW64) AppleWebKit / 536.11 (KHTML, e.g. Gecko) Chrome / 20.0.1132.57 Safari / 536.11 UNSTABLE

Answer 3

In IE10 Win7 x64:

Mozilla / 5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident / 6.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; HPNTDF ;. NET4.0C) UNSTABLE