Hi,

At startup, IPython (qtconsole) calls 
"socket.gethostbyname_ex(socket.gethostname())[2]" to find a list of IP 
addresses that point to the machine. On a Linux server that I manage this call 
is extremely slow (>20s)... which I have trouble understanding as "ip addr 
show" seems to give the same information nearly instantaneously. Is there 
anything I can do to make this faster? Can this be a network configuration 
issue (I am behind a router)?

This issue is independent of IPython:

$ time python -c 'import socket; 
print(socket.gethostbyname_ex(socket.gethostname())[2])' 
['192.168.0.102']
python -c   0.07s user 0.02s system 0% cpu 28.190 total

Thanks.

Antony
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