On 17/08/14 02:30, guns wrote:
On Fri 15 Aug 2014 at 06:17:37PM +0800, Peter Bell wrote:
I have been experiencing extremely slow browsing performance - as
an example, a 'first' google search takes, typically, 20 seconds to
display the results page - the slowest I've recorded has been 30
seconds. Subsequent google searches complete within 2 seconds.
Firefox (and Chromium IIRC) will break down individual HTTP request
timings into sections, the first of which is DNS resolution. You can
use this to at least confirm that DNS is really the issue while web
browsing.
https://developer.mozilla.org/en-US/docs/Tools/Network_Monitor
https://mdn.mozillademos.org/files/7417/nm-timings.png
Wow, that is a useful tool, of which I was not aware.
The results I am seeing show that my problem has little to do with name
resolution, but to some considerable delays in connecting and,
sometimes, sending a request. I'm guessing that these will be delays at
my ISP, or beyond.
Immediately before this test, I had run an Ookla speedtest which showed:
Ping 62ms, Download 15.15Mbps and Upload 8.91Mbps. This is around
midday on Sunday, so the network could be fairly busy, reducing
the speeds below what I often experience.
However, what is even more obvious are the huge delays between
successive requests. I'm guessing that these delays must be within my
own machine, and not dependent on any external reponses.
I will post a couple of screenshots showing some results from Firefox.
http://www.bellfamily.org.uk/downloads/GoogleTimings.png
http://www.bellfamily.org.uk/downloads/GoogleTimings2.png
Speedtest result: http://www.speedtest.net/my-result/3694358010
However, since this appears to exonorate dnsmasq as the major culprit,
I will need to find another forum for this discussion ... any
recommendations?
I will tackle the less significant delays around name resolution as a
separate exercise, but I guess that it is possible that these are also
due to network delays.
Regards,
Peter.
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Peter Bell Mob: +63 (0) 9287 340 343
Tagum City, Philippines. Tel: +63 (0) 84 216 9037
email/msn: [email protected] Tel: +63 (0) 84 308 0002
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