Enable TCP BBR congestion control: sysctl -w net.ipv4.tcp_congestion_control=bbr. BBR achieves 2-25x higher throughput than CUBIC (the default) on lossy networks, and 10-30% lower latency. Enable TCP Fast Open for repeat visitors: sysctl -w net.ipv4.tcp_fastopen=3. Increase buffer sizes: net.core.rmem_max=16777216 and net.core.wmem_max=16777216. These kernel-level optimizations improve performance for every connection to your VPS.
TCP Optimization
Enable TCP BBR congestion control: sysctl -w net.ipv4.tcp_congestion_control=bbr. BBR achieves 2-25x higher throughput than CUBIC (the default) on lossy networks, and 10-30% lower latency. Enable TCP Fast Open for repeat visitors: sysctl -w net.ipv4.tcp_fastopen=3. Increase buffer sizes: net.core.rmem_max=16777216 and net.core.wmem_max=16777216. These kernel-level optimizations improve performance for every connection to your VPS.
HTTP/2 and HTTP/3
Enable HTTP/2 in Nginx: listen 443 ssl http2. HTTP/2 multiplexes multiple requests over a single TCP connection, eliminating head-of-line blocking and enabling server push. Header compression reduces overhead for API-heavy applications. HTTP/3 (QUIC) goes further, using UDP to eliminate TCP head-of-line blocking entirely. Nginx supports HTTP/3 experimentally. For most sites, HTTP/2 alone provides 20-50% improvement in page load time over HTTP/1.1.
CDN and Edge Optimization
Place a CDN (Cloudflare, Fastly) between users and your VPS to cache static content at edge locations. This reduces the number of requests hitting your VPS and improves perceived latency for users far from your data center. Enable Brotli compression (20-30% smaller than gzip for text) for modern browsers. Implement resource hints: preload for critical assets, preconnect for third-party domains. Velox Media’s premium managed infrastructure combined with a CDN delivers optimal performance globally.
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