jonathanc-n commented on code in PR #1299:
URL: https://github.com/apache/iceberg-rust/pull/1299#discussion_r2078283965


##########
crates/iceberg/src/spec/name_mapping/mod.rs:
##########
@@ -55,7 +96,7 @@ pub struct MappedField {
     #[serde(default)]
     #[serde(skip_serializing_if = "Vec::is_empty")]
     #[serde_as(deserialize_as = "DefaultOnNull")]
-    fields: Vec<Arc<MappedField>>,
+    fields: Vec<MappedField>,

Review Comment:
   No need for arc here, the mapping is created once + there won't be a time 
where more than one thread is accessing.



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