Following several weeks of profiling under real-world conditions, we have applied a set of kernel and network configuration improvements to our infrastructure.
Key changes include tuned UDP and QUIC processing to reduce per-packet overhead for our most common traffic types, refined connection tracking parameters to better handle the diversity of clients we serve - including mobile networks, corporate environments, and high-concurrency resolvers - and optimized our packet processing pipeline ordering to minimize CPU cycles on the most frequent code paths.
These changes deliver measurably more consistent DNS response times during peak hours, with particular improvement for users on high-latency or variable-quality connections such as mobile and satellite networks.
A deep tuning cycle of our kernel networking parameters has improved DNS response consistency and reduced tail latency during peak usage periods.
Highlights
- Tuned UDP and QUIC processing for reduced per-packet overhead
- Improved handling of mobile, satellite and corporate proxy traffic
- Optimized packet processing pipeline for lower CPU cycles
- More consistent DNS response times during peak usage
- Refined connection tracking parameters for diverse client types