FastOSC

FastOSC is a fast and memory-optimised C# OSC (Open Sound Control) library for .NET8+.

Features

• High Performance: Designed for speed and low memory usage.
• Ease of Use: Simple and intuitive API.
• Compatibility: Supports the full 1.0 spec. Extended support for UTF-8.

Usage

var sender = new OSCSender();
await sender.ConnectAsync(new IPEndPoint(IPAddress.Loopback, 9000));

var message = new OSCMessage("/address/test", new OSCMidi(1, 1, 1, 1));
sender.send(message);

var receiver = new OSCReceiver();
receiver.OnPacketReceived += packet => // handle packet
receiver.Connect(new IPEndPoint(IPAddress.Loopback, 9001));

If you don't want to use the built-in sender and receiver:

var message = new OSCMessage("/address/test", new OSCMidi(1, 1, 1, 1));
var data = OSCEncoder.Encode(message);

var data = // some byte data

var packet = OSCDecoder.Decode(data);
if (packet is OSCMessage message)
{
    // handle message
}
else if (packet is OSCBundle bundle)
{
    // handle bundle
}

Benchmarks

Encode/Decode benchmarks were ran with the address set to /avatar/parameters/VRCOSC/Media/Position and a single float argument, as it represents a real-world use of this library. Benchmarks were ran on an i7-11700k, Windows 10.

Operation	Library	Mean (ns)	StdDev (ns)	Ops/sec	Allocated (B)	Gen0	Gen1
Message Encode	FastOSC	35.75	0.375	~27.97 M	80	0.0095	-
	FastOSC (ArrayPool)	24.14	0.146	~41.43 M	0	-	-
	RugOsc	83.11	2.129	~12.03 M	168	0.0200	-
Message Decode	FastOSC	39.00	0.722	~25.64 M	192	0.0229	-
	RugOsc	134.77	1.260	~7.42 M	480	0.0572	-
Pattern Matching	FastOSC	1,297.00	28.000	~0.77 M	3,270	0.3986	0.0019
	FastOSC (Caching)	107.54	0.452	~9.30 M	32	0.0038	-
	RugOsc	3,274.29	86.136	~0.31 M	10,528	1.2550	0.0381