> On Jul 1, 2016, at 10:28 AM, Nicholas Outram via swift-users
> <swift-users@swift.org> wrote:
>
> class methods may mutate "mutable static variables” (singletons), which are
> dangerous in multi-threaded code.
This is the same argument zh ao made. But instance methods may also mutate
static variables, so the fact that you’re calling a class method doesn’t make
the call any more dangerous.
Moreover, mutating instance variables can be just as dangerous for
multithreaded code (and is a more frequent source of bugs IMHO).
Really, the only significant difference is that a class method can’t modify
instance variables, so from that perspective it’s actually a bit safer than an
instance method call!
—Jens
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