[Limitaion] sendRequest function passed to the client is NOT thread-safe – it cannot be called concurrently

[epoberezkin]

That is, can it be used concurrently from multiple threads?

Or should there be something that queues calls to it, like reads/writes to TCP handle?

I've actually already implemented a queueing mechanism, and now just feeling a bit stupid as from looking at source code it does look thread safe, and queueing requests just makes performance worse...