Internet Browser Speed issues

[Carrot63]

Hi

We are looking for either some advice or a recomendation of an expert who might be able to help us troubleshoot an issue we have

 

The main symptom of the issue is that Google Chrome and to a lesser extent IE take quite a while to load up (20 secs to 1 minute regularly and on occasion longer and then are really pretty slow opening new websites. It feels as if it is more related to ssl sites and you will often see the messages in the info bar saying "resolving url xxx" and it will scroll slowly through the various urls that go to make up the page. Sites like Twitter, TES Jobs, News sites are particular bad examples. The first load of the page is generally worse then when you reload the page again a bit later.

 

Sometimes you will get the browser saying unresponsive and are unable to click anything then it will all kick back into life again. It can happen everywhere but it is not consistent. It can happen to everyone but it is not always terribly bad. Every now and again a whole class may struggle to get web pages up in any sort of reasonable time so the lesson is ruined in these cases

In the early stages we thought it was internet related however our ISP, and to a certain extent further testing, have ruled that out. We have had a networking report done and nothing has shown up there. We have been improving switches as much as we can and have vlanned the macs off our predominantly flat network. We have a 1gb infrastructure but hope to move to 10gb in time. If we knew 10gb would solve the issue we would move but I am not convinced it would.

When we have the unresponsive browser issue we generally can browse the network very quickly so that doesn't really make much sense for a networking issue. Some people see an improvement when they reset the chrome browser however not all.

 

I think that a non-domain joined machine does not experience the problem so much however as it is an inconsistent problem that is not definitive. So could problem gpos result in these issues? We have looked for dns issues but have not found anything wrong.

Nothing obvious shows up on wireshark. I have run procmon while opening chrome and loading a few pages and of course you see thousands and thousands of lines and I am not really sure what to look for or if that would even identify anything.

 

We seem to be going round in circles at the moment and I would like to form a plan of action as to how to proceed to identify the issue. Reports back from staff are very inconsistent so tests with different settings do not always give helpful results. I think I probably need an expert to come on site to see it happening and run tests and know exactly what to look for to identify the issue. Can anyone recomend such a person/company? Or has anyone seen similar issues and have anything to suggest?

 

Thanks