Tuesday, September 15, 2009

Reduce DNS lookups

Each DNS will be converted to IP address. Server will wait until the conversion completes. DNS lookup takes 20-100 miliseconds. The DNS is cached for later use. Firefox uses 1 min, IE uses 30 min for the dns caching. This caching is done on a special caching server. Each browser has a own DNS cache. It also stores the information on the operating systems cache.
Reducing DNS lookup cuts response time, but also reduces parallel downloading so increases response time. We can use upto 4 hostnames which will increase our speed.




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1 comment:

Ellys Directory said...

so where the way to reduce dns lookup??
i dont see here