There is a pretty good comment from Chris Lattner about ARC versus GC :
<a href="https:&#x2F;&#x2F;lists.swift.org&#x2F;pipermail&#x2F;swift-evolution&#x2F;Week-of-Mon-20160208&#x2F;009422.html" rel="nofollow">https:&#x2F;&#x2F;lists.swift.org&#x2F;pipermail&#x2F;swift-evolution&#x2F;Week-of-Mo...</a>