Shekharrajak commented on code in PR #3558:
URL: https://github.com/apache/datafusion-comet/pull/3558#discussion_r2835849493


##########
spark/src/main/scala/org/apache/comet/iceberg/IcebergReflection.scala:
##########
@@ -19,8 +19,167 @@
 
 package org.apache.comet.iceberg
 
+import java.lang.reflect.Method
+
 import org.apache.spark.internal.Logging
 
+/**
+ * Cache for Iceberg reflection metadata to avoid repeated class loading and 
method lookups.
+ *
+ * This cache is created once per serializePartitions() call and passed to 
helper methods. It
+ * provides ~50% serialization speedup by eliminating redundant reflection 
operations that would

Review Comment:
   updated 



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