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https://issues.apache.org/jira/browse/PDFBOX-2852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15490973#comment-15490973
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John Hewson commented on PDFBOX-2852:
-------------------------------------
The intermediate strings don't remain in memory forever, but they do result in
an allocation for each string (and eventual GC) and for each intermediate
string. For very large concatenations (tens, if not hundreds) of strings this
can have a noticeable performance impact in terms of both time and memory.
Otherwise concatenation is preferred - it's usually more readable.
> Improve code quality (2)
> ------------------------
>
> Key: PDFBOX-2852
> URL: https://issues.apache.org/jira/browse/PDFBOX-2852
> Project: PDFBox
> Issue Type: Task
> Affects Versions: 2.0.0
> Reporter: Tilman Hausherr
> Attachments: PDNameTreeNode.java.patch, XMPSchema.java.patch,
> explicit_array_creation.patch, fix_javadoc.patch, foreach.patch,
> semicolon.patch, stringbuilder.patch, unnecessary_type_casting.patch,
> unused_imports.patch, winansiencoding.patch, winansiencoding2.patch
>
>
> This is a longterm issue for the task to improve code quality, by using the
> [SonarQube
> report|https://analysis.apache.org/dashboard/index/org.apache.pdfbox:pdfbox-reactor],
> hints in different IDEs, the FindBugs tool and other code quality tools.
> This is a follow-up of PDFBOX-2576, which was getting too long.
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