Dennis Du Krøger created METAMODEL-187:
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Summary: ExcelDataContext uses more memory than it needs to for
File-based resources.
Key: METAMODEL-187
URL: https://issues.apache.org/jira/browse/METAMODEL-187
Project: Apache MetaModel
Issue Type: Bug
Reporter: Dennis Du Krøger
Priority: Minor
ExcelDataContext uses the input stream from resources, even if it is a
FileResource. This is pretty wasteful memory-wise, both according to
http://poi.apache.org/spreadsheet/quick-guide.html#FileInputStream and to own
tests; I made a naïve change that uses the internal File of FileResources on a
huge file. With InputStream, getting the defaultSchema used around 950 MB in
average, while it used around 650 in average with the File based version
(nothing scientific, just eyeballed in JVisualVM).
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