Is there any way to speed up fclose when writing many small files?

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Lawrence Karr 2022-3-22

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https://ww2.mathworks.cn/matlabcentral/answers/1678019-is-there-any-way-to-speed-up-fclose-when-writing-many-small-files

评论： Lawrence Karr 2022-8-20

I need to write a very large number of distinct individual files to an SSD. Opening and writing these files is quick, but fclose is painfully slow.

Is there a way to speed this process? I am using a 2TB external drive.

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Answer 1

Benjamin Thompson 2022-3-22

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Maybe push all the closing to the end and use fclose('all')? Is it possible there is still a write operation being completed and that is holding things up?

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Lawrence Karr 2022-3-22

If I delay using fclose, and then fclose all, fclose all can take many seonds!

I checked and I can open and write many files (maybe 1000 of them) very quickly. If I then exit matlab, the files are present and correct. Eventually, if I don't do fclose, matlab complains. fclose takes something like 40 milliseconds (an eternity).

Lawrence Karr 2022-8-20