update with the update with ByteBufHolder
update ByteBufHolder
修正注释
根据org.ireland.jnetty.buffer.UnoolledPkPolledTest里的测试结果,PooledByteBufAllocator比Unpolled的分配给buf的效率和性能要高,故采用PooledByteBufAllocator代替
Unpolled
Unpooled Pk Polled Test