[swift-dev] Very slow Set<String>(arrayOfStrings) for some arrayOfStrings

Jens Persson jens at bitcycle.com
Tue Mar 1 07:01:03 CST 2016

For some particular arrays of strings, creating a
Set<String>(arrayOfStrings) takes about 100 to 200 times longer than for
other very similar arrays of strings (equally many unique simple [a-zA-Z ]+

I've put together a tiny program to demonstrate the problem here:

Is this due to a bug / performance problem in Set or can it be explained
(and solved) in some way?

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