Stream parsing performance improvement + patch
----------------------------------------------
Key: PDFBOX-1175
URL: https://issues.apache.org/jira/browse/PDFBOX-1175
Project: PDFBox
Issue Type: Improvement
Components: Parsing
Affects Versions: 1.7.0
Reporter: Timo Boehme
Priority: Minor
Stream parsing is one of the critical parts looked from a performance point of
view since typically most data is stored in streams. While PDFBOX already got
some speedup some time ago in the method copying stream data from file to
random access buffer (BaseParser#readUntilEndStream) there is some room for
improvement.
The problem with the current implementation is the byte wise reading and
writing of the data. I have rewritten the method using byte arrays for IO and
optimized the number of needed comparisons for finding 'endstream'/'endobj'.
This results in 7-8 times faster parsing of streams and a 3-4 times faster
parsing of a normal 10 page PDF.
See the attached file which is a drop in replacement for the readUntilEndStream
method in BaseParser.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
