Baffled by strange limit on browsers

May 13, 2018
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After many hours of scratching my head, I have finally shrugged my shoulders and said "Oh well lets see what competent people think".

This is by no means a problem but a hindrance, I will begin with a small back story...

I use Chrome as my default browser - I decide to do a speed test and the results were (130 / 12 Mbps), strange as I usually get (220 /12 Mbps). I do a couple more and they are very similar around 130. Ping and Upload are the same as always but what gives?? I go to install an update on steam and what do you know 28 MB/s. How strange... I then go and run another speed test in edge with the same results 130 Mbps. At this point I am ready to accuse steam of Bullsh*ttery. My next test was a simple SMB transfer, 'KABAM' network usage 99% I was using gigabit at full capacity. Sooooo I was more confused than ever. I managed to shed some light when I did a speed test on Firefox, I was getting full 220 / 12 Mbps???

So far it seems as though speedtest.net on chrome and edge are only able to reach 130 Mbps, system resource usage for all 3 browsers are exactly the same when testing - apart from disk usage, Edge and Firefox appear to use barely anything whereas chrome used around 16 Mb/s. I would suggest speedtest.net can't transfer a test file quick enough however Edge uses exactly the MB/s as Firefox.


Probably worth mentioning my network setup consists of a standard Virgin Media Hub 3 in modem mode, pfSense does basically everything, I also have a 24 port layer 2 gigabit switch. pfSense fluctuates around 40% CPU usage when testing on all browsers, usually idles around 5%. I don't have caching enabled, I haven't changed any configs either. I even took pfSense completely out the picture and put my hub back into default router mode. I still get the exact same results, I even did a speed test over WIFI on a Mac, this was on chrome and I received the good old 220 / 12 Mbps.

The problem seems to be isolated to my desktop, I am now admitting defeat and reaching out to the good people to see what you all think of this. I may be missing something really obvious so if there are any other reliable tests you know of let me know.

:)