I have two potential solutions here. First, simply check netstat -an to
see if there are any background applications sucking bandwidth (e.g.
Ubuntu auto updater, or a long forgotten torrent client). If this comes
up with nothing, there is a way to use curl to figure out what part of
web browsing is causing the hangup.
Curl instructions:
Just in general you can debug http(s) using curl with the -w option but here is
a small config file that should make it easy.
First, if you haven't already installed curl, do so with sudo apt-get install
curl
Second, create a file called curl-timing.cfg in your home directory.
In that file paste:
\n
DNS lookup :
%{time_namelookup}\n
Connect to server (TCP) : %{time_connect}\n
Connect to server (HTTP/S) : %{time_appconnect}\n
Time from start until transfer began : %{time_pretransfer}\n
Time for redirection (if any) : %{time_redirect}\n
Total time before transfer started : %{time_starttransfer}\n
\n
Total time :
%{time_total}\n
Size of download (bytes) : %{size_download}\n
Average d/l speed (bytes/s) : %{speed_download}\n
\n
Then, try to download any url, suppose you used google, substituting in your
country top level domain for .com:
curl -w "@curl-timing.cfg" -o /dev/null -s http://www.google.com/
And the output will look something like:
DNS lookup : 0.012
Connect to server (TCP) : 0.031
Connect to server (HTTP/S) : 0.000
Time from start until transfer began : 0.031
Time for redirection (if any) : 0.000
Total time before transfer started : 0.098
Total time : 0.117
Size of download (bytes) : 14527
Average d/l speed (bytes/s) : 124347.000
Compare the results to fetching an Indian server from the US, or
elsewhere:
$ curl -w "@curl-timing.cfg" -o /dev/null -s http://india.gov.in
DNS lookup : 0.377
Connect to server (TCP) : 0.716
Connect to server (HTTP/S) : 0.000
Time from start until transfer began: 0.716
Time for redirection (if any) : 0.000
Total time before transfer started : 1.974
Total time : 3.650
Size of download (bytes) : 34345
Average d/l speed (bytes/s) : 9408.000
If curl gives good results overall after testing multiple websites, the
issue will be in the browser itself, not TCP/HTTP or a network issue.
Hope this helps
~qbalazs
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https://bugs.launchpad.net/bugs/1208219
Title:
browsing is slow
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