Decrease a relay buffer size for MIPS devices

mtglib/internal/relay/pools.go

@@ -0,0 +1,18 @@
+package relay
+
+import "sync"
+
+var bufPool = sync.Pool{
+	New: func() any {
+		b := make([]byte, bufPoolSize)
+		return &b
+	},
+}
+
+func acquireBuffer() *[]byte {
+	return bufPool.Get().(*[]byte)
+}
+
+func releaseBuffer(p *[]byte) {
+	bufPool.Put(p)
+}