I am using google open DNS now.
I want to test it's speed. How can I?
I can ping and see that it gets faster. I need some faster way.
If you just want to time the lookup of a single record, use
namebench is probably the tool you're looking. It does lookups based on domains are in your browser cache, random records from a list of popular records, etc. It is highly configureable to test your preferred list of DNS servers, your list of records, etc.