N1qlQueryExecutor is allocating twice the memory it needs

When the netty ByteBuf is not backed by a byte array.
N1qlQueryExecutor#executeQuery is allocating the byte array twice.

• the first time in TranscoderUtils#byteBufToByteArray
• the second with Arrays#copyOfRange

a specialized version of TranscoderUtils#byteBufToByteArray should be created that will only call Arrays#copyOfRange if the ByteBuf is backed by a byte array.

A hackish implementation tested in our environment reduced our n1ql memory allocation by 50% !