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https://issues.apache.org/jira/browse/PDFBOX-2945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14737083#comment-14737083
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ASF subversion and git services commented on PDFBOX-2945:
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Commit 1702043 from [~tilman] in branch 'pdfbox/trunk'
[ https://svn.apache.org/r1702043 ]
PDFBOX-2945: optimize uniXXXX calculation, as proposed by Philip Helger
> PDType1Font.getNameInFont(String) very slow when Unicode fallback is used
> -------------------------------------------------------------------------
>
> Key: PDFBOX-2945
> URL: https://issues.apache.org/jira/browse/PDFBOX-2945
> Project: PDFBox
> Issue Type: Improvement
> Components: PDModel
> Affects Versions: 2.0.0
> Environment: Windows 10, Pdfbox SNAPSHOT as of revision 1697721 from
> today, Java 1.7.0_76, 64Bit
> Reporter: Philip Helger
> Fix For: 2.0.0
>
> Attachments: pdfbox2945.patch
>
>
> When the method is called on a non-embedded font and the unicode fallback is
> used, the line "String uniName = String.format("uni%04X",
> unicodes.codePointAt(0));" is called and it is very slow. I suggest either
> adding a cache (codepoint to uniname) or at least replace the String.format
> call with something different, as this internally invokes a new RegExp
> Matcher etc.
> Something like the following might do the trick (maybe you have a better
> utility classes):
> {code}
> final StringBuilder aID = new StringBuilder (Integer.toString
> (unicodes.codePointAt (0), 16).toUpperCase (Locale.US));
> while (aID.length () < 4)
> aID.insert (0, '0');
> aID.insert (0, "uni");
> final String uniName = aID.toString ();
> {code}
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