About parallel computing toolbox

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C Zeng
C Zeng 2013-11-10
评论： HK Physicist 2020-5-22
Hello, everyone,
I have a code of large scale problem, and it contains many for loops, and all loops are independent. I want to compute it by parallel toolbox.
Is it enough by changing all "for" to "parfor"?
Thank you.

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Walter Roberson
Walter Roberson 2013-11-10
It might be, but you might also find that you need to adjust the code slightly. The easiest way to find out is to try.
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Walter Roberson
Walter Roberson 2013-11-11
Using multiple threads requires starting up new processes, setting up MATLAB on them, moving the code for the thread to the new process, moving the data for the thread to the new process, running the thread, synchronizing with the original process so that the various threads do not write over each other, collecting the results, and shutting down the process. That can be a lot more time than just doing the initial code in the original thread.
HK Physicist
HK Physicist 2020-5-22
It seems that it does not work cleverly.
It works only when the data structure is well planned manually.

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