garydgregory commented on a change in pull request #573:
URL: https://github.com/apache/logging-log4j2/pull/573#discussion_r713151635



##########
File path: 
log4j-core/src/main/java/org/apache/logging/log4j/core/pattern/PatternParser.java
##########
@@ -669,20 +668,20 @@ private int finalizeConverter(final char c, final String 
pattern, final int star
                 msg.append("] starting at position ");
             }
 
-            msg.append(Integer.toString(i));
+            msg.append(i);
             msg.append(" in conversion pattern.");

Review comment:
       I do not think we should hide boxing and unboxing if we are making all 
of these performance based changes. I would think we would want to see as much 
of the mechanics as possible.




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