" But even while sending boatloads of traffic to the server, it cannot accept more than ~7000 TCP connections per second (on an 8-core EC2 instance, c1.xlarge running Xen). / Another rumour I've heard is that EC2 instances can't push more than 100k PPS. "
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Performance Optimization - Amazon Simple Storage Service
Why is TCP accept() performance so bad under Xen?
