[jira] [Closed] (PDFBOX-4877) Matrix class performance improvements

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

     [ https://issues.apache.org/jira/browse/PDFBOX-4877?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alfred closed PDFBOX-4877.
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> 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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