> prevent HashDoS attacks[1] at the expense of slower hashing. I actually don't know whether Go's hashmap does the same.

From looking at the code[1], it seems like it does. From[2] it looks like it is only for platforms that have AES.

1. https://github.com/golang/go/blob/7bfe32f39c59056c49f5776b10...

2. https://github.com/golang/go/issues/9365