Byte arrays are a major source of LOH allocations when streaming logging events across nodes. Allocating a large MemoryStream once and then growing it as needed almost completely removes allocations for byte arrays.

This should significantly improve memory traffic during large builds.

If we use WriteAsync and don't await it, then subsequent WriteAsync may be called before the first continuation returns. If both calls share the same buffer and they overlap, we will overwrite the data in the buffer and cause junk to arrive at receiver.

This avoids blocking the main loop. Roughly equivalent to writing the packet asynchronously using fire-and-forget (BeginWrite).