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

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.

Answer 1

[Benjamin Thompson]

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?

[Lawrence Karr]

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]

i had aleady tried the fclose all approach. i does not speed the process.