is there any difference between debug mode and release mode in MATLAB?

2016 7 7
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更新时间：2017 3 8
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I'm using Robotic System Toolbox, using callback function to read data from a robot.
There is a problem, when I run the code in debug mode, or, in the command line, it works correctly. However, when I run the code in release mode(which means, put the code in a function file, and then run that function file), matlab can't read any data from robot...
I wonder, if there any optimization in release mode that makes its result different from debug mode's. By the way, in release mode, if I use par for (parpool) and drawnow inside that function file, the code works correctly... If I just use par for, or just use drawnow, the code works wrong...

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Walter Roberson
Walter Roberson 2016-7-7
drawnow should not have much effect inside a parfor, as parfor workers cannot interact with the graphics system. However, it is possible that you are using a tight loop and as well have a device that needs callbacks (such as a serial device) and the device is having trouble getting the callback to execute in the tight loop. A tight loop and a timer should be okay in any release in about the last 5 years as timers are permitted to interrupt even without a pause() or drawnow()
Dingqiao Zhu
Dingqiao Zhu 2016-7-7
Thank you for your help！～ But I think I have to add some info about my question for you...
>> help drawnow
drawnow Update figure windows and process callbacks
In fact, if I don't use drawnow inside par for loop, the callback will be hang on and thus I couldn't be able to read any new data.
The problem may have nothing to do with tight loop... Because I haven't used a loop inside my code at first. Adding the par for loop is just to test another circumstance...
Walter Roberson
Walter Roberson 2016-7-7
编辑：Walter Roberson 2016-7-7
What kind of callback is being processed, and where is the callback being defined (inside the parfor loop or outside the parfor loop) ?
Dingqiao Zhu
Dingqiao Zhu 2017-3-8
The callback is about Robotics System Toolbox. Matlab client use this callback to receive serial message from Robotic Operation System.

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