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https://issues.apache.org/jira/browse/TIKA-2849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16816714#comment-16816714
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Tim Allison commented on TIKA-2849:
-----------------------------------
While working on this, I also noticed that we're detecting ooxml files twice --
once in the zipdetector and once in OOXMLParserFactory. This is not a rigorous
test, and other things may be going on, but it looks like there may be an
improvement in _parsing_: on 10 iterations of parsing our zip-based unit test
files, it took
177 seconds for stream and 158 seconds for file based tikainputstream before
and
134 seconds for stream and 133 seconds for file-based tikainputstream after
that (and other) fixes
> TikaInputStream copies the input stream locally
> -----------------------------------------------
>
> Key: TIKA-2849
> URL: https://issues.apache.org/jira/browse/TIKA-2849
> Project: Tika
> Issue Type: Bug
> Affects Versions: 1.20
> Reporter: Boris Petrov
> Assignee: Tim Allison
> Priority: Major
>
> When doing "tika.detect(stream, name)" and the stream is a "TikaInputStream",
> execution gets to "TikaInputStream#getPath" which does a "Files.copy(in,
> path, REPLACE_EXISTING);" which is very, very bad. This input stream could
> be, as in our case, an input stream from a network file which is tens or
> hundreds of gigabytes large. Copying it locally is a huge waste of resources
> to say the least. Why does it do that and can I make it not do it? Or is this
> something that has to be fixed in Tika?
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