Dandandan commented on code in PR #20807:
URL: https://github.com/apache/datafusion/pull/20807#discussion_r2903375923
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datafusion/physical-expr-common/src/binary_view_map.rs:
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@@ -292,6 +292,19 @@ where
// Extract length from the view (first 4 bytes of u128 in
little-endian)
let len = view_u128 as u32;
+ let is_inline = len <= 12;
+
+ // Fetch the input value bytes once to avoid redundant memory
+ // access during hash resolution and insertion.
+ // For inline strings (<=12 bytes), extract bytes directly
+ // from the view (no memory fetch needed).
+ // For non-inline strings (>12 bytes), fetch once from the array.
+ let view_bytes = view_u128.to_le_bytes();
+ let input_value: &[u8] = if is_inline {
+ &view_bytes[4..4 + len as usize]
Review Comment:
I think we don'nt need this for the inline path (we use the u128 directly)
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