Trying to read text file inside parfor loop versus passing it as a parameter

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I have a couple txt/csv files that contain upward to 5000 lines. Each line contains information that I intend to read in as input to a function inside parfor loop. Is it best if I read the text files as a matrix/struct/etc. and the parfor loop can access the information from said matrix/struct? Or is it better have the part that read files inside the parfor loop?
Mohammad Sami
Mohammad Sami on 24 Mar 2020
Edited: Mohammad Sami on 24 Mar 2020
I suggest just load it once before parfor loop. As long as each loop is not modifying the contents, it should be fine.

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Accepted Answer

Rashed Mohammed
Rashed Mohammed on 19 May 2020
Hi Giang Le,
Assuming that you are trying to call a function with its parameters read from a file parallelly. However, using IO functions inside parfor loop can be slow. Hence as suggested by Sami, read the data before hand using readmatrix and then pass the content as parameters to function parallelly using parfor.
Hope this helps!

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