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Posted to dev@pdfbox.apache.org by "Andreas Lehmkühler (Jira)" <ji...@apache.org> on 2020/06/11 10:04:00 UTC
[jira] [Assigned] (PDFBOX-4877) Matrix class performance
improvements
[ https://issues.apache.org/jira/browse/PDFBOX-4877?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andreas Lehmkühler reassigned PDFBOX-4877:
------------------------------------------
Assignee: Andreas Lehmkühler
> 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
> Attachments: 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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