[PDFBOX-3133] PDFBox 2.0.0-RC2 and earlier 2.0.0 SNAPSHOT Versions print performance is poor with systems having low RAM < 3GB and lower number of fonts.

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 2.0.0
• Fix Version/s: 2.0.0
• Component/s: PDModel
• Labels: performance
• Environment: MS Windows Systems with low RAM < 3GB and number of fonts were less < 592 (or if desired fonts in PDF to be printed are not available in local system )
• Flags: Important
• Assignee: John Hewson
• Reporter: Sridhar
• Created: 25/Nov/15 15:13
• Updated: 11/Dec/15 19:47
• Resolved: 11/Dec/15 19:47

Description

PDFBox 2.0.0-RC1, SNAPSHOTS and RC2 versions print takes 15+ seconds.
Steps to reproduce
--------------------------
Use Windows System with < 3 GB RAM
Use Systems with less number of fonts or without specific fonts in PDF file to be printed.

Printing PDF file
Took 14 to 20 seconds in system with 3 GB RAM which had 522 foints
Took 24 to 34 seconds in system with 2 GB RAM which had 90 fonts
Took only 2.5 seconds in system with 8 GB RAM which had 1025 fonts.

Doubt
--------
Not browsed the code, but following is the doubt as causing performance issue.
Though the code caches fonts by storing fonts in local .pdfbox.cache file first time and caching fonts for subsequent times.
Not clear whether the code updates the pdfbox fonts cache file if new fonts are found in new PDF file to be printed, while printing subsequent times.
If the fonts in PDF file to be printed is not available in the .pdfbox.cache file stored in local system/local system what is the behaviour? Will the code download fonts and update cache for subsequent times or is it limited by fonts available in local system? Looks like later is the case and performance got hit either due to RAM or not constantly updating fonts cache or due to un availability of fonts in local system.