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https://issues.apache.org/jira/browse/TIKA-2849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16816617#comment-16816617
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Tim Allison commented on TIKA-2849:
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I ran a loop 20 times over all zip-based files in our unit tests.
For _detection_, it now takes 4.4 seconds with the streaming zip detection, and
it takes 30.9 seconds for the file based detection.
If we're _parsing_ the zip-based files, I get 239 seconds for both "streaming
detect then parse" and "zip file detect then parse".
> 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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