WCF UDP multicast channel performance

After creating a custom UDP mulitcast channel using WCF I ran some tests. I used this sample data contract class:

        string Name
        string Description
        ushort Id
        double X
        double Y
        double VX
        double VY
        uint Flags
        DateTime CreatedTime
        DateTime UpdateTime

Benchmark Results: 

• Max amount of sent objects per second using 100mbit hub (using Intel 3Ghz HT CPU - not dual core): 46000
• CPU load during peak sending - 15-25%
• Effect of zip encoding - 50% less bandwidth with random values (probably 60-70% reduction in a real-world scenario)
• Sending 10000 objects per second - no significant CPU load (3-5% for both apps), GC load - less than 0.5%