Why Is Matlab So Slow On My System ?

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Jay on 11 Oct 2014
Edited: Michael Melnychuk on 28 Jan 2015
Matlab never used to be so slow on my system and I can not figure out why the processing speed is lagging.
I am running Windows 8.1.
The laptops processor is 2.0 GHz Intel Core i7, RAM = 16.0 GB OS is 64 bit
When running Nortons it states that Matlab is only using 1% of the CPU.
I cant understand why its lagging and any insight would be appreciated.

Accepted Answer

Jan on 19 Oct 2014
The profiler is the tool to find out, which commands take the time.

More Answers (4)

Jan on 11 Oct 2014
You do not provide any details, such that an answer is not possible.
Perhaps the virus scanner uses 99% of the processing time. Or Matlab accesses a large file on the hard disk, which is dramatically defragmented. Or the M-files are stored on a network drive and the network is exhausted by other programs. There could be many reasons and wild guessing is inefficient.

Jay on 11 Oct 2014
The virus scanner uses 1% also.
The .M file is on a portable hard drive and the script isn't very intensive (used on uni computer and a lot faster).
Has anyone else noticed a slowdown when running windows 8.1?
  1 Comment
Jan on 19 Oct 2014
Please use the answer section for answers only. Is this a comment to my answer?

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Jay on 19 Oct 2014
Does the processing time lag considerably when reading the files in (xlsread command)?
I found when I write commands in the workspace it returns the answers almost instantaneously.

Michael Melnychuk
Michael Melnychuk on 28 Jan 2015
Edited: Michael Melnychuk on 28 Jan 2015
I don't know man, matlab is soooper slow on my computer. It is usually quick when it first starts up but then after a couple hours it can take up to 10 minutes to plot a figure. I thought maybe it was a virus so I shut off the internet and then 300 figures popped up, matlab crashed and so did google chrome. not sure what's going on...I'm on Mac OSx by the way

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