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https://issues.apache.org/jira/browse/PDFBOX-4869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17129071#comment-17129071
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Alfred commented on PDFBOX-4869:
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Ran a test for parsing the Courier-Bold font repeatedly.
When refering FontBox + PDFBox as jar on the classpath:
Using a plain input stream, extraction took 1879ms.
Using buffered input stream, extraction took 328ms.
Using a plain input stream again, extraction took 1889ms.
When using the Fontbox+ PDFBox classes from a folder, not from a jar, there's
no difference:
Using a plain input stream, extraction took 446ms.
Using buffered input stream, extraction took 449ms.
Using a plain input stream again, extraction took 443ms.
> Reading standard 14 fonts is slow
> ---------------------------------
>
> Key: PDFBOX-4869
> URL: https://issues.apache.org/jira/browse/PDFBOX-4869
> Project: PDFBox
> Issue Type: Improvement
> Components: Parsing, Text extraction
> Affects Versions: 3.0.0 PDFBox
> Reporter: Alfred
> Priority: Major
> Original Estimate: 1m
> Remaining Estimate: 1m
>
> I ham testing text extraction from PDF and profiling the execution.
> I found that the second biggest time consumer is the static code in
> Standard14Fonts that loads fonts from the pdf box jar.
> The culprit seems to be the direct use of the stream returned
> getResurceAsStream.
> That would be a ZipInputStream when using PDFBox as a jar.
> Using a buffered stream around it reduces the load time a lot.
>
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