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Alfred commented on PDFBOX-4877: -------------------------------- The essence of the change is: * don't use array copy, just replace the array in the destination with the temporary array created for multiplication * don't do any IFs during multiplication > 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. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org