On 06/29/11 at 10:15am, ChadDavis wrote: > I notice that the following two invocations of netstat have > drastically different execution times: > > netstat > > netstat -n > > > When you just use numerical addresses, it executes almost instantly, > but with the domain names and whatever you call those logical names > for the port numbers, such as 'www', it takes quite while ( 5-10 > seconds). > > Not a big deal, but just made me think. Surely the name resolution > isn't that costly is it? Depends on latency and distance to your DNS server, how long it takes the DNS server to perform the recursive query or forward to a server which does, whether you have the answer cached locally or at any of the servers along the way, etc. So it can vary wildly.. 5 seconds seems high to me, it takes about 1 for me and I have a lot of active connections. -- Liam
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