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Ask Slashdot: An Accurate Broadband Speed Test? 294

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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Ask Slashdot: An Accurate Broadband Speed Test?

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  • by AK Marc ( 707885 ) on Thursday October 09, 2014 @01:53PM (#48104591)
    They are all ISP run, or open to bribery. The most independent one I've seen is https://www.google.com/get/vid... [google.com] which is an ISP quality measure, not a speedtest.
    • ndt (Score:5, Informative)

      by Anonymous Coward on Thursday October 09, 2014 @01:59PM (#48104657)

      NDT - Argonne National Laboratory
      ndt.anl.gov/

      Not associated with any ISP.

      There are other ndt (network diagnostic tests) as well.

      Very detailed reports.

    • Re:None (Score:5, Informative)

      by malakai ( 136531 ) on Thursday October 09, 2014 @03:04PM (#48105339) Journal

      I like http://speedof.me/ [speedof.me]

      It's fast, works with HTML5, works on mobile, tablet, desktop. As far as I can tell, it's hosted in the Amazon Cloud.

      -frank

    • Re:None (Score:4, Informative)

      by gweilo8888 ( 921799 ) on Thursday October 09, 2014 @04:15PM (#48106081)
      Why would an ISP bribe them, when all they need do is identify when a speed test is occurring and give that traffic priority over all else? They wouldn't, and your tinfoil hat is too tight if you think otherwise.

      Speed test sites are fundamentally flawed, but bribery has nothing to do with it.
  • Really? (Score:5, Insightful)

    by Maxwell ( 13985 ) on Thursday October 09, 2014 @01:55PM (#48104603) Homepage

    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.

    • So which speed test from DSLReports do you suggest we use?

      • Re: (Score:2, Informative)

        by Maxwell ( 13985 )

        Maybe you should follow the instructions on their Tools page:

        Speed Test
        We have the following speed tests

        Flash (Adobe) download/upload speed test
        Accurate for tests of residential DSL and cable connections

        Java download/upload speed test
        Capable of higher speed testing, for example, fiber

        Mobile browser Speed and Latency Test (http://i.dslr.net/iphone_speedtest.html)
        Javascript Speedtest, for mobile full featured browsers (iPhone, Android and so on)

    • What about DSLReports' speed tests makes them inherently more trustworthy than any other? All the ISP needs to do is prioritize speed test traffic over all other traffic, and speed tests become meaningless. Heck, they could even raise your cap for the duration of a speed test to make it seem like you got a faster speed while actually capping you to a lower one. The whole thing is a joke.
    • 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.

      The ISPs cheat for the speed tests by temporarily increasing your bandwidth so that the tests detect a higher transfer rate than what they are actually giving you. They don't even prioritize just the DSL testing sites either; at least AT&T DSL doesn't.

      • temporarily increasing your bandwidth

        So that's different from what they actually advertise, speeding up the first X megabytes or whatever? (I _think_ that's what Xfinity Blast is, but I can't actually find a description on their site at the moment.)

  • VPS (Score:5, Interesting)

    by ledow ( 319597 ) on Thursday October 09, 2014 @01:58PM (#48104637) Homepage

    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.

    • Re:VPS (Score:5, Informative)

      by TubeSteak ( 669689 ) on Thursday October 09, 2014 @02:10PM (#48104779) Journal

      Rent or trial a VPS. You can get them for literally a few pounds/dollars per month.

      The old timey way of doing speed tests is to hit up FTPs and see what your max sustained speed is.

    • by swb ( 14022 )

      I usually like to build the file with random data and then run it through gzip to make sure the data is in no way compressible.

  • by Anonymous Coward

    UC Berkeley's NetAlyzr.

  • DIY test (Score:2, Interesting)

    by Anonymous Coward

    If your ISP doesn't fiddle with your traffic, a heavily seeded torrent will normally do a good job of saturating your connection.

    • by ihtoit ( 3393327 )

      mod parent up. I find a newish torrent with a dozen or so seeders will saturate my connection (7MBit cellular).

      • Re: DIY test (Score:2, Insightful)

        by Anonymous Coward

        Torrent on cellular? You are why we can't have nice things.

    • by Bengie ( 1121981 )
      Saturating my download is simple, it's my upload that's hard. Few peers from the USA can handle my 50mb/s upload. When seeding Linux ISOs, most peers that max my connection are from Sweden or Germany and peer directly with Level 3.
      • Friends with internet.

        Get one.

        Test your upload. It will have the simultaneous benefit of testing their download speeds.

        • by Bengie ( 1121981 )
          I was able to get an early torrent of a big Linux distro, like Ubuntu right at a major version release, and I had hourly averages, according to PFSense, of 42mb/s-46mb/s for almost 8 hours strait from 3pm-11pm. That's an average of ~90% utilization. I was limiting Torrent because I didn't want it to interfere with my video games.
      • Saturating my download is simple, it's my upload that's hard.

        You could also try for total composite speeds by using a bunch of torrents. My seedbox regularly runs 40Mbps total upload speed on the 50+ torrents, even though no one torrent is running that fast. I actually throttle the max upload to 50Mbps to allow 30Mbps free bandwidth to FTP the files to my home.

  • 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.

  • I use speedof.me (Score:4, Informative)

    by AvitarX ( 172628 ) <me@brandywinehund r e d .org> on Thursday October 09, 2014 @02:02PM (#48104691) Journal

    And frequently score higher on my tmobile phone than on comcast (up to 30 vs up to 15)

  • by NevarMore ( 248971 ) on Thursday October 09, 2014 @02:06PM (#48104733) Homepage Journal

    https://www.samknows.com/ [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.

    • by Nkwe ( 604125 )

      https://www.samknows.com/ [samknows.com]

      I'm doing this because I'd like to think it helps the FCC keep the ISPs honest.

      It probably also helps to ensure that *your* connection gets priority...

      I have one of the boxes as well and ensuring that my ISP is motivated to give me good service was part of the reason I put it in. I also think that it is a good idea to have a FCC based performance monitoring infrastructure out there. While I don't think the program is monitoring user's activity, I am a bit on the paranoid side, so I don't run all my traffic through the box (which is a supported configuration.)

      As an aside, I am on FIO

    • by Archangel Michael ( 180766 ) on Thursday October 09, 2014 @03:07PM (#48105387) Journal

      Other Libertarian here. ISPs are a product of government collusion (monopoly) practices. The further a government is away from me, the less I trust it.

      That being said, we do not need MORE regulation of ISPs, we need out of the box thinking to reframe the last mile problem. I have NO problem with a local municipality running last mile service, as long as I get to choose which provider gets to my house. This would require Fiber to the premise, running back to a COLO that is rented (funded) out to service providers to provide ANYTHING they want to the customer. A choice of four or six providers at the COLO to choose from, and a simple Network VLAN change to change providers.

      THIS would negate the need for ANY regulation. If Johnny Christian wants to have Jesus.net cable co, he can get it. If Mary Rotten wants all porn and drug channels, she is free to choose that. Comcast will be forced to stop playing games, because they will lose customers if they throttle YouTube and Netflix.

      Almost all problems we have right now, are caused by last mile monopolies. Lets inject CHOICE, rather than regulation into the market.

      • Re: (Score:2, Interesting)

        by Anonymous Coward

        This would require Fiber to the premise, running back to a COLO that is rented (funded) out to service providers to provide ANYTHING they want to the customer. A choice of four or six providers at the COLO to choose from, and a simple Network VLAN change to change providers.

        That's what they already have in Iceland, Sweden, Finland, Norway, Denmark, and the Netherlands!

        Libertarians dream of a world with X. Socialists live in that world.

        • Because small monoculture Scandinavian countries are the same as the Melting pot of the world that has a multicultural world view.

        • Just to be sure we're talking about the same "choice", I see that Sweden has two or three Cable providers. The idea of a Cable provider going to COLO facility is crazy, unless they are splitting available Cable frequencies. To be honest, it looks like the "choice" is pathetic even if it does what I suggested. Then I look at the number of Cable Channels offered and I think I currently have more shopping channels those cable providers carry (slightly sarcastic). the number of channels is pathetic.

          Which is, ex

    • You should probably read this: http://www.farces.com/samknows... [farces.com] Samknows is frankly a waste of your power bill; it doesn't keep ISPs honest in the least.
  • by bigmo ( 181402 ) on Thursday October 09, 2014 @02:07PM (#48104741)

    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.

    • by Teun ( 17872 )
      The well respected guru's of my ISP agree with the other guru's that frequent the relevant newsgroup the only way to establish your line speed is to up and download from the ISP's own servers, using anything else is unreliable as it involves multiple parties that are not part of the contract you have with your ISP.

      So they made available a bunch of files to play with.

      ftp://ftp.xs4all.nl/pub/test/ [xs4all.nl]

  • Youtube speed test won't tell you anything as youtube content tends to be cached locally at your ISP by GGC (Google Global Cache).

    • by PRMan ( 959735 )

      And yet, for about a year with Time Warner, YouTube was the ONLY bad site. Constant and endless buffering. Until I set my preferred video to 720p. And then it ran much faster than the 240p, 360p or 1080p.

      Then someone told me this could be fixed by switching to Google's DNS and sure enough it went away immediately.

  • No (Score:4, Insightful)

    by Charliemopps ( 1157495 ) on Thursday October 09, 2014 @02:21PM (#48104879)

    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.

  • by jbov ( 2202938 ) on Thursday October 09, 2014 @02:24PM (#48104903)
    Use the Xfinity speed test at speedtest.comcast.net [comcast.net].
    As far as I can tell, they are not affiliated with any ISP.
  • by Twinbee ( 767046 ) on Thursday October 09, 2014 @02:31PM (#48104973)
    Speedtest.net [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/ [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 [testmy.net] - Nice graph and intelligent picking of the size of the test file to download.
  • Short answer: No (Score:5, Informative)

    by Morgor ( 542294 ) on Thursday October 09, 2014 @02:33PM (#48104997) Homepage

    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.

  • If you have a system that you can test against (i.e. a server at your work with a fatter-pipe then you have at home, or a hosted server/VPS/etc.)

    iperf

    run "iperf -s" on the server and "iperf -c server.ip.address" on the client.
    Read the man pages for more options.

    If you don't have a 'known better then you' to test against try this to test your maximum download bandwidth.
    Simple test: download a large file from Microsoft (i.e. a 'network install' service pack, or similar) or other big-host

    More complicated:
    r

  • by account_deleted ( 4530225 ) on Thursday October 09, 2014 @02:36PM (#48105041)
    Comment removed based on user account deletion
    • http://www.measurementlab.net/... [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.

      They now have a Flash version as well, so it's easier. But the numbers appear really low, claiming that my network buffer limits download to 140Mbps, yet I have often downloaded actual files from the Internet at faster than that.

      OTOH, all the Ookla-powered sites claim I get over 70% of my 1Gbit network card speed [speedtest.net], which I also find hard to believe, despite having a 20Gbps connection to our ISP (with literally thousands of users, one of which is a server I maintain that downloads at over 2000Mbps 24/7 backi

  • 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.

    • by Teun ( 17872 )
      Or download an Obama interview.
    • by afidel ( 530433 )

      If you have a typical asymmetrical connection you'll want to limit your number of peers to ~200 per 1Mbps of upload you have, any more than that and you tend to actually see your download speeds slow as your client uses so much bandwidth managing peers that it chokes off the return packets to keep the download speed going.

  • There are simply to many variables to get results that you feel comfortable believing. But what you could do is create a file that's 10M and send it and receive it from a friend (or multiple friends) connection that is using the same bandwidth speeds and a different ISP. Even this has lots of holes in it, but at least you can get some peace of mind. In my mind, there is no true valid test, unless you have complete control over all hardware between you and the end, which not many can have.

    Another way t
  • 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/ [simet.nic.br] (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.
  • by RobbieCrash ( 834439 ) on Thursday October 09, 2014 @02:52PM (#48105217)

    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.

    • That's my method. 10 connections per server to 3 servers significantly geographically separated.
  • Really?

    Either just say, "... my ISP, Comcast..." or don't name them at all. Trying to be cute just muddles the conversation and gains absolutely nothing.

    Why do you care about other people's results, too? Just upload a large file to somewhere with known good bandwidth (amazon S3 might be a good choice, or FTP it to Dreamhost, or whatever), time it, then pull it back down again (and time that). You'll get a pretty accurate "actual bandwidth" there.

    If you're paranoid - and it appears that you are - make the

  • by QuietLagoon ( 813062 ) on Thursday October 09, 2014 @03:05PM (#48105353)
    Not run by ISPs. Sniffs out bandwidth shaping.

    .
    http://www.measurementlab.net/... [measurementlab.net]

    Runs on OS-X, Windows, Linux. Port available on FreeBSD.

  • by Nonesuch ( 90847 ) on Thursday October 09, 2014 @03:06PM (#48105367) Homepage Journal

    Netflix offers several test streams [netflix.com] for validating your speeds, and Google has a Video Quality Report [google.com]

    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) [mozilla.org] and MSIE [microsoft.com] to try to determine what parts of a page are particularly slow.

  • Downloading a popular TV show episode over Bittorrent will saturate your link. It is a good measure of your connection speed.

  • The FCC has an Android App that will test your data connections from your phone, and allows them to monitor your provider bandwidths. When your phone connects to your local WiFi the app is testing your Cable ISP, and when not, its testing your cellular ISP. In both cases the data is collected by the FCC to make sure your bandwidth is not being throttled unnecessarilly.

    In theory the ISP's might look to see where your data is headed and make adjustments based on that, but that of course would be deceitful.

  • I had been noticing poor performance from Youtube when watching videos (buffering, dropping to low-res, etc). Then I noticed that youtube seemed to work much better while I was connected through VPN, which is the opposite of what you would expect, at least in theory. But I realize that ISPs have been playing throttling games with large video sites like Youtube and Netflix.

    However, I did another test and the results of it were more surprising for me. I have 3mbps DSL service through Verizon. If I run a test

    • Does your VPN use compression? Try running the VPN-routed test using testmy.net; they use random incompressible data for their testing.
      • by Optic7 ( 688717 )

        I don't know if my VPN uses compression, but that's a good tip. I will check that out, thanks!

  • by jtara ( 133429 ) on Thursday October 09, 2014 @04:36PM (#48106327)

    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.

  • by nine-times ( 778537 ) <nine.times@gmail.com> on Thursday October 09, 2014 @05:08PM (#48106629) Homepage

    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.

  • Comment removed based on user account deletion
    • by mysidia ( 191772 )

      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 :)

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