Testing performance of public suffix list libraries.
On 2018 MacBook Pro (2.9 GHz Intel Core i9):
$ make -s
Testing https://godoc.org/golang.org/x/net/publicsuffix
1000 iterations = 0.001s
10000 iterations = 0.008s
100000 iterations = 0.074s
Testing https://docs.rs/publicsuffix/1.5.2/publicsuffix/
1000 iterations = 0.378s
10000 iterations = 3.534s
100000 iterations = 34.487s
Testing https://docs.rs/psl/0.4.1/psl/
1000 iterations = 0.000s
10000 iterations = 0.002s
100000 iterations = 0.021s