251869 2023-02-07 11:09:22 -0800 Iteration order of Set.prototype.intersection is different from proposed spec when this.size > other.size 2023-03-21 18:36:00 -0700 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build Unspecified Unspecified RESOLVED CONFIGURATION CHANGED P2 Normal --- 1 keith_miller webkit-unassigned ross.kirsling webkit-bug-importer oldest_to_newest 1931776 0 keith_miller 2023-02-07 11:09:22 -0800 It's currently specified that the order should be the same as the this value even though we iterate on the other object. This is difficult in our implementation because we can't O(1) test the order of two elements. 1931780 1 keith_miller 2023-02-07 11:29:33 -0800 Also, heres's the issue tracker for this on the spec side: https://github.com/tc39/proposal-set-methods/issues/91 1942993 2 ross.kirsling 2023-03-21 18:36:00 -0700 Looks like the plenary decision was just to drop the sorting step, so we can simply remove the FIXME.