[jira] [Resolved] (PDFBOX-4883) COSFloat is extremely slow

["Andreas Lehmkühler (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PDFBOX-4883?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andreas Lehmkühler resolved PDFBOX-4883.
----------------------------------------
    Resolution: Fixed

[~Faltiska] Thanks for the feedback. I guess we are done here, set to resolved

> COSFloat is extremely slow
> --------------------------
>
>                 Key: PDFBOX-4883
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4883
>             Project: PDFBox
>          Issue Type: Bug
>          Components: PDModel
>    Affects Versions: 2.0.20, 3.0.0 PDFBox
>            Reporter: Alfred
>            Assignee: Andreas Lehmkühler
>            Priority: Major
>              Labels: display, optimization, parsing, textextraction
>             Fix For: 3.0.0 PDFBox
>
>         Attachments: After.png, Before.png, PDFBOX-4883-b.patch, PDFBOX-4883.patch, extreme-values-out.pdf
>
>
> I am testing text extraction from PDF and profiling the execution.
> I found that biggest time consumer is the COSFloat class.
>  
> All other improvements I suggested so far are small compared to this.
> But this is the also the most complex one.
>  
> I have attached te profiler output for the same text extraction, with and without the COSFloat changes.
> The time to extract the same text was 4 times long with the original COSFlow, because of its use of BigDecimal.
> I will try to write extra tests for all cases I see in the original COSFLoat code, if they are not already tested.
> Then I will submit for review a new COSFloat version.
>  
> I think this affects parsing and displaying PDFs too, not just text extraction.



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