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Ask Slashdot: An Accurate Broadband Speed Test?
First time accepted submitter kyrcant writes Is there a way to accurately really test my "broadband" connection? I don't trust the usual sites, the first ones I found via Google. I suspect (and found) that at least some of them are directly affiliated with ISPs, and I further suspect that traffic to those addresses is probably prioritized, so people will think they're getting a good deal. The speeds I experience are much, much slower than the speed tests show I'm capable of. For a while I thought it might be the sites themselves, but they load faster on my T-Mobile HTC One via 4G than on my laptop via WiFi through a cable modem connection. Is there a speed test site that has a variable or untraceable IP address, so that the traffic can't be prioritized by my ISP (call them "ConCazt")? If not, which sites are not in any way affiliated with ISPs? Is there a way to test it using YouTube or downloading a set file which can be compared to other users' results?
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They are all ISP run, or open to bribery. The most independent one I've seen is https://www.google.com/get/vid... which is an ISP quality measure, not a speedtest.
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How are people not aware of DSLReports and their speed tests? And how could this possibly make /.?
Also, your wi-fi sucks. Get a cable if you want to know what your real speed is.
Rent or trial a VPS. You can get them for literally a few pounds/dollars per month.
Put a large file on Apache on it.
Download the file from several places.
Rename the file on the server to check it's not cached.
The "upper limit" on this is then the VPS, which generally are connected direct to 100mbps lines in a datacenter somewhere. If you think it's limited by the VPS, get another from another provider. Or load up iptraf or some packet capture and see how it did.
Speedtest websites are indicative only, and are cheated on by some places. Your own website can't be cheated on - you will see the request coming in and can watch the outgoing traffic to see where the bottleneck lies.
UC Berkeley's NetAlyzr.
NDT - Argonne National Laboratory
ndt.anl.gov/
Not associated with any ISP.
There are other ndt (network diagnostic tests) as well.
Very detailed reports.
If your ISP doesn't fiddle with your traffic, a heavily seeded torrent will normally do a good job of saturating your connection.
Seriously, find a handful of known-high-bandwidth places to download stuff from and download some large files from each of them and use your PC's network-monitoring tools to gauge your bandwidth.
As for as upstream, get some email account from various providers, compose a message, and attach a large-ish file.
Note - if your ISP gives you "burst speed" you will have to "burn through that" before you start getting "real" numbers.
Knowledge is how to play a game, intelligence is how to win, wisdom is knowing what game to play.
And frequently score higher on my tmobile phone than on comcast (up to 30 vs up to 15)
Wow, sent an e-mail as suggested when clicking on "use classic" banner, and got a fast response that addressed my msg
All right. Just who woke him up this time? Whoever it is, you need to put him back down in his bunker and this time LOCK THE DOOR.
Faster! Faster! Faster would be better!
That appears to be run by OOKLA, the same guys who run Speedtest.net.
I don't trust Speedtest.net's results, either, as they seem to ALWAYS run at the maximum speed for the connection even when my Internet connection on sites like Youtube or Netflix is slow. I think that there is some shady content prioritization going on there.
https://www.samknows.com/
I have one of their boxes installed. It seems to provide a clear picture of overall performance with a monthly report. I'm doing this because I'd like to think it helps the FCC keep the ISPs honest.
PS - Card carrying Libertarian. No the FCC isn't spying on me, and yes regulation of ISPs is appropriate. If we've broken the free market by granting a local monopoly or limited oligopoly then heavy regulation is appropriate. Consumer choice is better, but this is the best we can do with what we have today.
It's hard to know if slow speeds are from your connection or the server you're connecting to or something in between. If you download a linux distro over bit torrent you'll be bypassing any individual server bottleneck and any (except local) general network slow downs. I usually get extremely good speeds from bit torrent, pushing 15 mbit, from my "15 mbit" fios connection. I don't use it a lot so I don't see any alleged throttling from it.
DSLReports or any of that stuff is only useful to determine if you have a decent working internet connection. They should never be used for any sort of benchmarking as one has to assume carriers optimize connections to them to make themselves look good.
That's because your ISP throttles Youtube and Netflix.
There is no way to test "The internet"
The fact of the matter is you make dozens of hops, even hundreds, to get anywhere. En-route you can hit any number of choke points. If you run a speed test I can almost guarantee your ISP knows about the speed test site and is going to prioritize your traffic. Add to that the fact that the speed test site is likely hosted somewhere like the Amazon cloud and all you're testing is your route to about the easiest place to get to.
Is your ISP throttling Torrents? Netflix? Youtube? A test to any other site is useless if they prioritize that and throttle where you actually want to go. Is there a problem with your NID? The remote you connect to? The peering they have setup?
On top of all of that, speed test sites are just a test of downloading various file sizes. That's easy... flawless movie playback and seamless online game play? That's an entirely different story. You've no idea how many friends I've had complain about their ISP throttling their game, only to find out later the problem cleared up when they got a new video card. lol
So if your ISP is not working for your needs, you need to switch. If you have other options, most offer a contract free option now-a-days. Try that out and cancel if it's no better. If you have no other options, you're stuck with it anyway.
Your best bet, if you're stuck with that ISP, is to make friends with a tech. Get one out there for some reason, offer him a beer, whatever. Joke, laugh, etc... he'll probably tell you what's up. Once you know where the problem is, often you can figure out how to talk them into a better solution. In these situations you're usually fighting their bureaucracy... its not that they don't want to help, it's just a lot of paperwork to get that help. Be more annoying than the paperwork.
Network topology isn't that straight forward. From your ISP's routing center to different portions of the Internet can be faster or slower than others. Check out network peering topic to understand why YouTube may be slow, while other sites are not.
Two of my imaginary friends reproduced once
Use the Xfinity speed test at speedtest.comcast.net.
As far as I can tell, they are not affiliated with any ISP.
Speedtest.net used to be good at one stage. But when I tried them relatively recently, I found that they measure the speed once it gets going, and ignore the regular dropouts that may occur. Speedtest.net claimed about 1gigabit, but in reality it was a tenth or even a fiftieth of that.
I had more luck with the following:
http://speedof.me/ - HTML5 Internet speed test (no Flash or Java needed). It claims to be the "smartest and most accurate online bandwidth test".
http://testmy.net - Nice graph and intelligent picking of the size of the test file to download.
Why OpalCalc is the best Windows calc
I'm a network engineer at an ISP, so I would say I have a bit of experience with this from both ends of the table. First of all, there's a difference between your broadband connection speed and your perceived rate. Your broadband connection might be capped to what you pay for, and, assuming your last-mile medium can handle that speed, that only means that you will never actually go beyond your connection speed.
Now as we know, the internet is a complicated network of interconnected systems. You are connected via your ISP's backbone to the other systems (ISPs, enterprises, content providers, etc.) via a number of internet peering points. These peering points have their own connection speed (typically 1 Gbit/s or 10 Gbit/s, although higher exist), and may or may not be utilised to their maximum extent at any point of time. This means that you may have your full data rate available to some destinations, while others may take a congested route.
You mention testing, and your frustration is very reasonable. There are testing sites out there, but you never have any idea about how many else might be testing at the same time, or how much load there is on the server at the moment of the test. If you are unlucky, you might also be limited by your hardware, your operating system (TCP Window Size, receive buffers and similar might not be tuned properly), or your router.
I would say your best choice would be to download as much as possible from as many sources as possible (bittorrent is excellent for this, but may be throttled by evil ISPs), and do this over a couple of days to get an average indication of how much your connection is capable of delivering.
If you have a server on some remote location via the internet, you can use programs like iperf to make a bandwidth test, but such a test is not exactly precise when you have no idea how the intermediate networks are.
return ArtistFormerlyKnownAs(ArtistFormerlyKnownAs(Prince));
The Network Diagnostic Test was able to see performance problems on my cablemodem connection that Ookla's speedtests did not.
http://www.measurementlab.net/...
Unfortunately, the number of ridiculous hoops you need to go through to let an unsigned Java applet run an arbitrary network I/O makes it much less useful.
o/~ Join us now and share the software
Pick a popular torrent — like a recent release of your favorite BSD or Linux distro — and start downloading (without any limits on your client side, of course). Watch the bandwidth. With a large number of peers, your measurement will be insulated from the oddities of any particular connection.
In Soviet Washington the swamp drains you.
I know it's not a good reliable test, but you can always try do download an .ISO file from some Linux distro from various sources or some big program from sourceforge.
The second alternative, you can try to use the meter from the Brazilian agency for internet at:
http://simet.nic.br/medidor/ (try googling: simet nic br)
it's not in any form affiliated with any US ISP and i think we have sufficient bandwitdth for the test.
It's not sourcery, it's Technology!!!
Download some binaries from a Usenet provider, that'll max out your connection.
I generally get ~13.5MBps down on my 120Mbps connection from Rogers. Uploading to my VPS gets me a solid 2MBps out of 20Mbps.
Keep on knockin'
https://robbiecrash.me
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http://www.measurementlab.net/...
Runs on OS-X, Windows, Linux. Port available on FreeBSD.
Netflix offers several test streams for validating your speeds, and Google has a Video Quality Report
I find that the Speedtest.Net results are a realistic estimate of my actual best case upload/download speed, but there are certainly some websites which are much slower to load, for various reasons. If you suspect your ISP is throttling some websites intentionally, you can always browse through a VPN service.
As mentioned previously, local WiFi problems are often the root cause of slow page loads. Go wired. You can also use the network debugging tools built into Firefox (Network Monitor) and MSIE to try to determine what parts of a page are particularly slow.
I do not deploy Linux. Ever.
Even being noisily right with an answer to a question that nobody's asking, in a conversation about something completely different, is annoying and should be discourages.
You're special forces then? That's great! I just love your olympics!
These speed tests are basically meaningless. There are too many factors that might affect the throughput and latency from your desktop or device to any given site.
Meaningful tests might include:
- local link test to neighborhood node, Internet access point - your ISP would need to install test servers in local (neighborhood, at least for cable setups) nodes and wherever traffic exits their network to the Internet. This would allow you to test latency and throughput within your ISPs own system. Obviously, this ultimately limits possible Internet speeds. Your ISP almost certainly already has these kinds of test servers. But they may or may not expose them or advertise them to users.
- A test employing MULTIPLE SIMULTANEOUS test servers. This would at least attempt to assess your available bandwidth "to the Internet".
You should not have any reasonable expectation of achieving the maximum theoretical throughput of your "Internet connection" to any given site. Or any one site at all. I do not know why people obsess so over these meaningless tests.
I don't trust the usual sites, the first ones I found via Google. I suspect (and found) that at least some of them are directly affiliated with ISPs, and I further suspect that traffic to those addresses is probably prioritized, so people will think they're getting a good deal.
I just wanted to point out that they're not necessarily trying to trick you by running these speed tests. For one thing, if they wanted to trick you, they could always just compile a list of popular test sites and prioritize/uncap that traffic.
But it's actually somewhat valid for ISPs to provide tests that, in a sense, are biased. Let's say you have a Verizon connection. Verizon may want to provide a testing mechanism to make sure you're getting the advertised connection to their network, to make sure things are operating properly. If you have a slow connection to Slashdot, for example, that might just mean that Slashdot is slow. It might mean that your route to Slashdot has been saturated somehow, and that might not be Verizon's fault. There are a lot of things that could possibly go wrong that could cause your connection to Slashdot to be bad, and Verizon can't rely on that as a good test.
So what Verizon would want to do is provide a test that simply confirms that your connection to their network is running at advertised speeds, which would mean testing between your home computer and another machine on their network. If that is operating at advertised speeds, but your connection to some endpoint is slow, then the problem is probably between Verizon's network and the endpoint, and not between you and Verizon's network.
You just gave me an idea....
I'm thinking about making a VPN Service that "Looks like" a speed test.
Very simple.... you request a HTTP download of file45456.zip and a simultaneous HTTP upload of file45457.zip
To maintain the connection, your VPN client will do this repeatedly.
However.... inside the HTTPS transfer there will be the encrypted IP packets you are exchanging encapsulated.
Also... of course, the same website will have a speedtest, all over HTTPS :)