Conclusion: an excellent utility that makes a potentially complex subject as simple as it can imaginably be. Returns latency measurements for each DNS provider on the basis of cached names, uncached, and dotcom lookup but it is best to run a customer query. Because it uses x86 Assembler, there's no Mac version but Linux users can access it through Wine.
Namebench. Available for Windows, Linux and Mac, Namebench is a useful if slightly aging utility that has benchmarks your current DNS service against a range of others, coming up with recommendations for primary and backup name servers, often from different providers. The output opens as html, complete with graphs and response times which in our case suggested improvements of between 13 percent and 60 percent over the default DNS name server offered by the ISP.
Source: Computerworld UK
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