switch packet buffer to smallvec

src/packets.rs

@@ -3,6 +3,7 @@ use std::fmt::Debug;
 use bytemuck::{Pod, Zeroable};
 use eyre::eyre;
 use serde::Serialize;
+use smallvec::SmallVec;
 use tokio::{
     io::{AsyncReadExt, AsyncWriteExt},
     net::tcp::{ReadHalf, WriteHalf},
@@ -79,7 +80,7 @@ pub struct Header {
 #[derive(Serialize, Default, Clone)]
 pub struct Packet {
     pub header: Header,
-    pub data: Vec<u8>,
+    pub data: SmallVec<[u8; 8]>,
 }
 
 impl Packet {