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Matlab Online very slow

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Frederik Kammel
Frederik Kammel on 18 Aug 2016
Commented: Eleanor Waxman on 8 Sep 2023
Hey guys,
I use Matlab Online and it is currently (18th of august 2016) very slow, almost unusable. If I wish to save my function, I need to wait 15 minutes for it, executing code takes ages, even if it is a simple size(someSmallVector). I know that Matlab Online is slower than the normal version but it was never so slow. Is there anybody out there experiencing the same issues?
Regards, Fred
Rajendra Kumar
Rajendra Kumar on 21 Jul 2018
I am facing the same issue.
Eric Chen
Eric Chen on 28 Jun 2022
the executing time is very unstable. Also if you execute
you would notice that the performance could vary a lot in a day, it could be cause by huge amount of user trying to execute their code at matlab online

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Accepted Answer

Hisham on 24 Jan 2020
Edited: Hisham on 27 Jan 2022
Hi all:
We have made significant enhancements to MATLAB Online performance and functionality since this issue has been raised, which should address all of the concerns raised in this discussion. If you have any concerns over your MATLAB Online experience, please do not hesitate to reach out to me using the link at the bottom of the MATLAB Online product page at
Nhan on 5 Sep 2023
Hi @Hisham. The problem remains the same, especially when I was taking the simulink onramp course. Could anyone in matlab do something to fully solve this problem?
Eleanor Waxman
Eleanor Waxman on 8 Sep 2023
I am having the same problem taking the "Matlab Fundamentals" course. It is nice that this is offered, but it is so painfully slow that it is diffcult to take.

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More Answers (6)

Bryan Staley
Bryan Staley on 11 Jun 2018
Try clearing your browser cache...worked for me.

John Gorman
John Gorman on 19 Jan 2018
I've been using Matlab online for a Coursera class and it is very slow. It takes about two minutes to log on, and then it may take another five or six minutes for my files to appear. It's so painful.
When I finally do get my files, the (short, simple) programs run very slowly. If I type '2+3' in the command window it may take a long time to run. Often it is unresponsive.
Not real impressed with Matlab online...
Hisham on 22 Jul 2020
Hello everyone:
Thank you very much for your feedback! We are striving to ensure a positive MATLAB Online experience for everyone. It would be great to learn more about each of your experiences so we can determine and address the root cause. If you could provide more information through our online technical support request page, it will help us immensely to identify the specific problems!
Mansi Chaudhari
Mansi Chaudhari on 23 Jul 2020
The problem is still there.

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Andreas Goser
Andreas Goser on 19 Aug 2016
I was bringing this post to the attention of MathWorks IT yesterday. They investigated it and could not find something out of the ordinary, nor were there other customer reports.

Bjørn Wiegell
Bjørn Wiegell on 11 May 2017
Edited: Bjørn Wiegell on 11 May 2017
I'm experiencing matlab online to be very slow atm. as well not 15 min, but it around 1 min to execute a simple function.....

Joe Sanford
Joe Sanford on 7 Jun 2017
i'm currently not even able to load a session ... prior to this I was able to run a script but the site Matlab's session would "end" before the script was done processing ...

himani J
himani J on 15 May 2018
same here.. is there any way we can still use offline matlab? I would prefer going to octave if matlab continues to behave this way..
  1 Comment
Pami Roy
Pami Roy on 9 Aug 2018
I download Octave because of this same reason but then my programming assignments are not getting submitted. "Refused to connect", "Grader sent no response" is the error. Could you help?

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