[PDFBOX-441] remove CosName nameMap cache

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.7.3
• Fix Version/s: 1.2.0
• Assignee: Unassigned
• Reporter: Sean Bridges
• Created: 18/Mar/09 17:48
• Updated: 01/Jul/10 07:26
• Resolved: 28/Mar/10 17:52

Description

The CosName class keeps a cache of all instances created in a static synchronized map. I am guessing this is for performance reasons to avoid creating objects, but in our system it is causing performance problems. We are running 7 threads extracting text from pdf's, and we can see a large number of conflicts reading from nameMap.

The CosName map is also a potential memory leak, which forces users to periodically clear it, as noted in PDFBOX-351

Can nameMap be removed altogether?

At the least, if PDSimpleFont replaced,

COSName.getPDFName( "FontDescriptor" )

with

COSName.FONT_DESC

It would reduce contention.