shyjsarah commented on code in PR #82:
URL: 
https://github.com/apache/paimon-vector-index/pull/82#discussion_r3911366324


##########
core/src/pq.rs:
##########
@@ -370,6 +376,85 @@ impl ProductQuantizer {
         );
     }
 
+    /// Blocked batch encode for the IVF-PQ add path.
+    pub(crate) fn encode_batch_blocked(&self, data: &[f32], n: usize, codes: 
&mut [u8]) {

Review Comment:
   **Suggestion (non-blocking):** The fixed `n >= 32` SGEMM threshold may be 
too low for wide Rayon pools, where small batches are split into tiny SGEMM 
calls. In a local 32-thread benchmark, 32/64-row batches were slower than the 
per-vector path. Could the threshold account for the pool width, or could we 
add benchmarks covering small batches with different thread counts?



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