gnodet commented on code in PR #1270:
URL: https://github.com/apache/maven/pull/1270#discussion_r1365012668


##########
maven-slf4j-provider/src/main/java/org/slf4j/impl/MavenSimpleLogger.java:
##########
@@ -71,8 +78,13 @@ private void printStackTrace(Throwable t, PrintStream 
stream, String prefix) {
             stream.print(prefix);
             stream.print("    ");
             stream.print(builder().strong("at"));
-            stream.print(" " + e.getClassName() + "." + e.getMethodName());
-            stream.print(builder().a(" (").strong(getLocation(e)).a(")"));
+            stream.print(" ");
+            stream.print(e.getClassName());
+            stream.print(".");
+            stream.print(e.getMethodName());
+            stream.print(" (");
+            stream.print(builder().strong(getLocation(e)));
+            stream.print(")");

Review Comment:
   Are you sure this is interesting in terms of performances ? The benefit to 
avoid multiple buffer allocations may be balanced by the synchronisation / 
flushes on the underlying character/byte streams...



##########
maven-slf4j-provider/src/main/java/org/slf4j/impl/MavenSimpleLogger.java:
##########
@@ -30,6 +29,14 @@
  * @since 3.5.0
  */
 public class MavenSimpleLogger extends SimpleLogger {
+
+    private static final String TRACE_RENDERED_LEVEL = 
builder().trace("TRACE").build();
+    private static final String DEBUG_RENDERED_LEVEL = 
builder().debug("DEBUG").build();
+    private static final String INFO_RENDERED_LEVEL = 
builder().info("INFO").build();
+    private static final String WARN_RENDERED_LEVEL =
+            builder().warning("WARNING").build();
+    private static final String ERROR_RENDERED_LEVEL = 
builder().error("ERROR").build();

Review Comment:
   I'd rather have those as fields rather than static.  In environments such as 
`mvnd`, this would avoid leaking system properties between builds.



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