Is parseText thread safe?

[fabrichter]

Thanks for your great work on this project!
I was wondering if the implementation is thread safe when used in a read-only fashion,
i.e. I want to initalize one AhoCorasickDoubleArrayTrie, set it up via build once
and then call parseText from multiple threads. Is this possible / safe to do?

[hankcs]

Yes, it's safe to call parseText from multiple threads. As this method doesn't modify any members, but put every temporary result on stack, it's thread safe.