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https://issues.apache.org/jira/browse/CAMEL-13399?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claus Ibsen updated CAMEL-13399:
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Issue Type: Improvement (was: Bug)
> ZipAggregationStrategy become slower when size of zip grows
> -----------------------------------------------------------
>
> Key: CAMEL-13399
> URL: https://issues.apache.org/jira/browse/CAMEL-13399
> Project: Camel
> Issue Type: Improvement
> Components: camel-zipfile
> Affects Versions: 2.23.1
> Reporter: Mykhailo Kozik
> Priority: Major
> Attachments: Screenshot 2019-04-08 18.41.10.png
>
>
> I have a simple route which runs by demand and archives multiple files in one
> zip archive.
> {code:java}
> from(file:/path/to/source)
> .aggregate(constant(1), new ZipAggregationsStrategy(true, true))
> .completionFromBatchConsumer()
> .eagerCheckCompletion()
> .to(file:/path/to/target){code}
> It works fine when the number of files in source folder is relatively small.
> After adding tracing logs to test size of input files / time taken by
> process, the following chart could be drawn.
> !Screenshot 2019-04-08 18.41.10.png!
> That means, to make zip archive from 500mb of files takes over 12 minutes!
> Looks like in order to add a file, camel extracts zip archive to input
> stream, put file inside it, and build zip archive again. So that becomes near
> quadratic complexity, and not acceptable for large folders.
> The workaround is to add completionSize or completionPredicate to flush every
> 100mb, so we got all files archived but splitted into several archives, which
> works but not the best choice.
>
> Is there a general solution how to make ZipAggregationStrategy to work in
> near linear time, so the process does not become slower with large number of
> files?
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