Petr Slaby created PDFBOX-2131:
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Summary: Avoid constructing debug messages if debug log is off
Key: PDFBOX-2131
URL: https://issues.apache.org/jira/browse/PDFBOX-2131
Project: PDFBox
Issue Type: Improvement
Affects Versions: 2.0.0
Reporter: Petr Slaby
Priority: Trivial
Attachments: DebugLog.patch
Concatenation and formatting of strings takes some time. If a debug message is
written to the log at a frequently called place, it should be surrounded by an
if(LOG.isDebugEnabled()). Using the if everywhere does not do any harm either.
Attached patch changes two classes which were sticking out in the profiler. The
difference in performance is not that big, but, in my application, each
millisecond counts.
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