Hello, everyone. I'm experience some performance issue when using clojure.
The scenario is as follows:
I have a huge list of xls files to process. I used the
org.clojars.boechat107/cloxls to read the files which for each file
generates a list(approximately 65,000 elements). Now I need to concatenate
all of them. I used (mapcat read-worksheet files) to get the final list,
but it soon reports out of heap space. Then I tried to use mutable
structures:
(doseq [f files]
(swap! sheet concat (read-worksheet f)))
where sheet is defined as (def sheet (atom [])))
But the concat seems to slow down a lot when the list grows larger. I'm
wondering if in clojure there is some efficient idiom to handle such
situation such as efficient concatenation?
Thanks,
Bruce Li
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