DNS Load Tester
loginThis tool floods a resolver with sustained query traffic to measure throughput. A public, unauthenticated form for it is indistinguishable from DNS-amplification abuse infrastructure, so it's disabled in the public version.
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What does DNS performance benchmarking measure?
DNS performance tools measure: queries per second (QPS) a resolver can handle, response latency distribution (min/mean/max/p99), query failure rate, and how performance degrades under increasing load. This reveals bottlenecks in resolver capacity before they impact end users.
Why does DNS speed matter?
Every network connection starts with a DNS lookup. A slow resolver adds latency to every page load, API call, and service connection. A resolver that can't handle peak query rates drops queries, causing timeouts and intermittent connectivity failures. High-traffic sites should benchmark their resolvers under realistic load.
Why is this tool disabled in the public version?
These tools send thousands of queries per second to a target resolver, which is functionally identical to a DNS amplification or DDoS attack from a third party's perspective. They are designed to run locally against resolvers you own and have explicit permission to test.