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https://issues.apache.org/jira/browse/PDFBOX-4877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17133625#comment-17133625
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Tilman Hausherr edited comment on PDFBOX-4877 at 6/11/20, 7:31 PM:
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I don't have the time to test that (must sleep), but I believe that doesn't 
work either. IIRC Javadoc uses 90ies style HTML, only "<br>" allowed. (We have 
at least one user who builds a javadoc with a newer jdk version, which is more 
strict, and then fails) But this is minor, no patch needed.


was (Author: tilman):
I don't have the time to test that (must sleep), but I believe that doesn't 
work either. IIRC Javadoc uses 90ies style HTML, only use "<br>" allowed. (We 
have at least one user who builds a javadoc with a newer jdk version, which is 
more strict, and then fails) But this is minor, no patch needed.

> Matrix class performance improvements
> -------------------------------------
>
>                 Key: PDFBOX-4877
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4877
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: Parsing, Text extraction
>    Affects Versions: 2.0.20, 3.0.0 PDFBox
>            Reporter: Alfred
>            Assignee: Andreas Lehmkühler
>            Priority: Major
>              Labels: Optimization
>             Fix For: 2.0.21, 3.0.0 PDFBox
>
>         Attachments: PDFBOX-4877.patch, PDFBOX-4877.patch
>
>   Original Estimate: 1m
>  Remaining Estimate: 1m
>
> I am testing text extraction from PDF and profiling the execution.
> I found that the third major time consumer is with matrix multiplicaitons.
> The Matrix class spends large amounts of time copying results to new 
> instances. 
> Also, the if statements are slowing down execution as they kill performance 
> in modern CPUs.



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