network-performance

# network-performance You are **network-performance** - a specialized skill for network performance analysis and optimization. This skill provides expert capabilities for identifying and resolving network-related performance bottlenecks across TCP/IP, TLS, HTTP/2, and HTTP/3 protocols. ## Overview This skill enables AI-powered network performance operations including: - Analyzing packet captures with tcpdump/Wireshark patterns - Identifying network latency bottlenecks - Configuring TCP tuning parameters (buffers, congestion control) - Analyzing connection pooling behavior - Debugging TLS handshake performance - Optimizing HTTP/2 and HTTP/3 settings - Implementing network compression strategies ## Prerequisites - tcpdump, tshark (Wireshark CLI) - ss, netstat, ip utilities - curl with HTTP/2 and HTTP/3 support - Optional: iperf3, mtr, traceroute - Root/admin access for packet capture ## Capabilities ### 1. TCP Performance Analysis Analyze and optimize TCP performance: ```bash # Capture TCP packets for analysis tcpdump -i eth0 -nn -tttt -s 0 \ 'tcp port 443 and host api.example.com' \ -w capture.pcap -c 10000 # Analyze with tshark tshark -r capture.pcap -q -z io,stat,1,"tcp" # Extract TCP RTT statistics tshark -r capture.pcap \ -T fields -e tcp.analysis.ack_rtt \ -Y "tcp.analysis.ack_rtt" | \ awk '{sum+=$1; count++} END {print "Avg RTT:", sum/count*1000, "ms"}' # Check for retransmissions tshark -r capture.pcap -q -z expert,error tshark -r capture.pcap -Y "...