This decreases total testing time by over a minute on my old Mac Pro.
It probably has much less effect on systems with fewer cores, but shouldn't
be any worse there.
Swift SVN r22745
algorithm
The implementation uses a specialized trie that has not been tuned to the table
data. I tried guessing parameter values that should work well, but did not do
any performance measurements.
There is no efficient way to initialize arrays with static data in Swift. The
required tables are being generated as C++ code in the runtime library.
rdar://16013860
Swift SVN r19340