[LOG4J2-772] Performance enhancement: ParameterizedMessage should not take String snapshots of its parameters in constructor

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Resolved
• Affects Version/s: 2.0, 2.0.1
• Fix Version/s: 2.6
• Component/s: API
• Labels: Performance
• Assignee: Remko Popma
• Reporter: Remko Popma
• Created: 11/Aug/14 13:54
• Updated: 11/Jul/16 07:09
• Resolved: 11/Jul/16 07:09

Description

Discovered during investigation for LOG4J2-763, ParameterizedMessage currently initializes its String[] stringArgs field in the constructor. This may be wasted work if the message is not used, for example because the log level is below the filter threshold.

The stringArgs field should be initialized in the getFormattedString method, not earlier.

Issue Links

• is related to: LOG4J2-898 Format messages asynchronously
• relates to: LOG4J2-763 Async loggers convert message parameters toString at log record writing not at log statement execution