[PDFBOX-3418] Slow string to hex conversion in ToUnicodeWriter

• Type: Improvement
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 2.0.1, 2.0.2, 2.0.3
• Fix Version/s: 2.0.3, 3.0.0 PDFBox
• Component/s: PDModel
• Labels: optimization performance
• Environment: Ubuntu 14.04 LTS
• Assignee: Tilman Hausherr
• Reporter: Michael Doswald
• Created: 12/Jul/16 15:43
• Updated: 25/Mar/17 18:13
• Resolved: 12/Jul/16 19:26

Description

The ToUnicodeWriter.writeTo(OutputStream) method converts a lot of shorts and strings to hexadecimal strings. This is done with String.format and therefore not very efficient.

The ToUnicodeWriter.toHex(int) and ToUnitcodeWriter.stringToHex(String) methods could be rewritten to generate a char-array and being generally more efficient.