Hello all! I really enjoyed Chris Lattner's slides from his talk at IBM < http://researcher.watson.ibm.com/researcher/files/us-lmandel/lattner.pdf>.
The speaker notes mention ARC: "There are two principle downsides to ARC that people cite: one is the need for atomic increment/decrements, which can be slow." [...] "The performance problems it can cause are real in some important cases" Can someone point me to a good resource that explains these problems? I guess atomic reference count changes create overhead in multithreaded applications? Are there more detailed explorations into this topic? Thanks! - Brian Gesiak
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