Gareth Daniel Smith created LOG4J2-3170:
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Summary: EncodingPatternConverter CRLF encoding is slow with large
log messages (it has quadratic time complexity)
Key: LOG4J2-3170
URL: https://issues.apache.org/jira/browse/LOG4J2-3170
Project: Log4j 2
Issue Type: Bug
Components: Pattern Converters
Affects Versions: 2.14.1
Reporter: Gareth Daniel Smith
This code that escapes newlines is very slow on large log messages where those
message contain lots of newline characters. For example "abc" repeated a
million times takes less than a second to log, but "a\r\n" repeated a million
times takes over 5 minutes (in my test).
I think it is accurate to say that this code has quadratic time complexity:
[https://github.com/apache/logging-log4j2/blame/master/log4j-core/src/main/java/org/apache/logging/log4j/core/pattern/EncodingPatternConverter.java#L151]
If necessary I can supply more examples and/or a fix.
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