Avoid allocation to get IP bytes

[verdie-g]

Small allocation that can be avoided with a stackalloc. This optimization gets burried by the deserialization of large response object. Though, if the response is small, then it matters.

I ran the benchmark code from #210 but replacing the response with an empty object.

_reader.Find<Empty>(IPAddress.Loopback);

Method	Mean	Error	StdDev	Gen0	Allocated
Before	235.4 ns	0.68 ns	0.63 ns	0.0038	64 B
After	232.8 ns	0.24 ns	0.19 ns	0.0019	32 B

[oschwald]

👍