🔧 Increase the packet send burst and receive buffer

Author: leolabs

midi-script/Socket.py

@@ -201,8 +201,9 @@ def process(self):
         try:
             while 1:
                 try:
-                    # Send 5 UDP packets at a time, to avoid
-                    for i in range(5):
+                    # Send 30 UDP packets at a time, to avoid
+                    # Node's receive buffer from overflowing
+                    for i in range(30):
                         self._socket.sendto(
                             self._send_buffer.pop(0), self._client_addr)
                 except:

src/index.ts

@@ -251,7 +251,12 @@ export class Ableton extends EventEmitter<EventMap> {
 
     // The recvBufferSize is set to macOS' default value, so the
     // socket behaves the same on Windows and doesn't drop any packets
-    this.client = dgram.createSocket({ type: "udp4", recvBufferSize: 786896 });
+    this.client = dgram.createSocket({
+      type: "udp4",
+      // 4 MB receive buffer to avoid losing packets
+      recvBufferSize: 4 * 1024 * 1024,
+    });
+
     this.client.addListener("message", this.handleIncoming.bind(this));
 
     this.client.addListener("listening", async () => {
@@ -305,6 +310,8 @@ export class Ableton extends EventEmitter<EventMap> {
       });
     });
 
+    this.logger?.debug("Receive Buffer Size:", this.client.getRecvBufferSize());
+
     // Send used port to Live in case the plugin is already started
     if (!sentPort) {
       try {