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https://issues.apache.org/jira/browse/DAFFODIL-2268?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Lawrence closed DAFFODIL-2268.
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> Optimization: reduce number of DecimalFormat's created for TextNumberParsers
> ----------------------------------------------------------------------------
>
> Key: DAFFODIL-2268
> URL: https://issues.apache.org/jira/browse/DAFFODIL-2268
> Project: Daffodil
> Issue Type: Bug
> Reporter: Steve Lawrence
> Priority: Major
>
> We currently have a TextNumberEv Evalutable that creates a ThreadLocal
> DecimalFormat. And every single numeric text element will have it's own
> unique TextNumberEv (and thus DecimalFormat), even if all the text number
> properties are exactly the same. Most schemas will probably have at most just
> a handful of unique text number properties so having a unique TextNumberEv
> and DecimalFormat for every one is wasteful. Instead, we should have some
> sort of cache so that TextNumberEv's with the same properties can reuse an
> already created DecimalFormat.
> A thing to keep in mind is that DecimalFormat is not thread safe, this this
> cache must use ThreadLocals or something avoid racey code.
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