[libreoffice-users] Re: Very slow document opening in LibreOffice 3.3.1

On 03/01/2011 07:14 AM, Don C. Myers wrote:
> I had the same issue, and found a fix on the Internet. I'm running 
> Ubuntu 10.10. Apparently this affected some OpenOffice installs. It 
> didn't affect me until I moved to LibreOffice. You need to modify your 
> hosts file as per the instructions here:
> http://www.linuxquestions.org/questions/linux-software-2/double-clicking-on-open-office-files-leads-to-very-slow-opening-808048/
> It worked perfectly for me.
...

Interesting! Thanks for that. Both OOo (standard) and LO show an intial
attempt on startup:

> $ sudo tcpdump -nnl -i eth0 -s 1536 dst port 53
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on eth0, link-type EN10MB (Ethernet), capture size 1536 bytes
> 08:55:19.185426 IP 192.168.1.100.60726 > <snipped>.53: 25658+ A? gl.(none). (27)
> 08:55:19.198881 IP 192.168.1.100.50501 > <snipped>.53: 8984+ A? gl.(none). (27)

If you leave the dump on and check extensions updates it, of course,
shows the connections.

I suspect the initial startup attempt is code that is supposed to check
for updates (even though I have it turned off in (S)OOo (OOo standard),
and it is not available in LO). (U)OOo - Ubuntu distro version doesn't
do this, as it doesn't check for updates on startups because it's
updates are from the repository/update manager.

So let's see what happens when I turn on the 'Check for updates
automatically' in (S)OOo:

> $ sudo tcpdump -nnl -i eth0 -s 1536 dst port 53
> [sudo] password for gg: 
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on eth0, link-type EN10MB (Ethernet), capture size 1536 bytes
> 09:13:58.989149 IP 192.168.1.100.44719 > <snipped>.53: 35400+ A? gl.(none). (27)
> 09:13:59.004241 IP 192.168.1.100.60531 > <snipped>.53: 39633+ A? gl.(none). (27)
> 09:14:36.374815 IP 192.168.1.100.34566 > <snipped>.53: 43543+ AAAA? 
> update36.services.openoffice.org. (50)
> 09:14:36.386675 IP 192.168.1.100.52925 > <snipped>.53: 36068+ A? 
> update36.services.openoffice.org. (50)
etc.

Now modify the hosts file:
> $ sudo tcpdump -nnl -i eth0 -s 1536 dst port 53
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on eth0, link-type EN10MB (Ethernet), capture size 1536 bytes
> 09:19:23.767805 IP 192.168.1.100.35025 > <snipped>.53: 49818+ AAAA? 
> update36.services.openoffice.org. (50)
> 09:19:23.779613 IP 192.168.1.100.34164 > <snipped>.53: 36403+ A? 
> update36.services.openoffice.org. (50)



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