code executes very slowly suddenly

Recently I am working on an application development that reads an external hardware and plots real time values in MATLAB. The program seems to work fine at frequency of 300Hz (300 sets of reading/second). The same program was altered to bring textual outputs at plot window using "uieditfield". This programm worked closer to 500Hz. This was the results I obtained last week.

I was trying to develop the same application in python to try out. But recently, when I try to run the same MATLAB code on the same laptop the frequency has dropped to 50Hz (graph plot) and 250Hz (textual output). Due to this I am losing sync while reading from the device and sync fails. I couldn't find any reasons why this happend. The external hardware works totally fine. I tried debugging by loading the data from csv and processing the data alone. Still the speed was less. I tried it on other pc, it was working good with the expected frequency.

So any reasons why this could happen?

I have not updated the MATLAB version

[Jan]

Without seeing the code and knowing any details, it is very unlikely that somebody guesses the reason of the problem. Matlb did not contain a magic "slow down at 9thode December" flag. Tjis means that something has been modified. So compare the backups of your code to finde the difference.

[dpb]

Is automagic OS update on? Could be the OS was updated w/o being aware of it.

Or, perhaps you picked up some additional malware if connected to internet...