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From GitBox <...@apache.org>
Subject [GitHub] iverase commented on a change in pull request #569: LUCENE-8687: Optimise radix partitioning for points on heap
Date Fri, 08 Feb 2019 11:54:10 GMT
iverase commented on a change in pull request #569: LUCENE-8687: Optimise radix partitioning
for points on heap
URL: https://github.com/apache/lucene-solr/pull/569#discussion_r255045631
 
 

 ##########
 File path: lucene/core/src/java/org/apache/lucene/util/bkd/BKDRadixSelector.java
 ##########
 @@ -294,18 +335,37 @@ protected int byteAt(int i, int k) {
       }
     }.select(from, to, partitionPoint);
 
-    for (int i = from; i < to; i++) {
-      points.getPackedValueSlice(i, bytesRef1);
-      int docID = points.docIDs[i];
-      if (i < partitionPoint) {
-        left.append(bytesRef1, docID);
-      } else {
-        right.append(bytesRef1, docID);
-      }
-    }
     byte[] partition = new byte[bytesPerDim];
     points.getPackedValueSlice(partitionPoint, bytesRef1);
     System.arraycopy(bytesRef1.bytes, bytesRef1.offset + dim * bytesPerDim, partition, 0,
bytesPerDim);
     return partition;
   }
+
+  PointWriter getPointWriter(long count, String desc) throws IOException {
+    if (count <= maxPointsSortInHeap / 2) {
 
 Review comment:
   We divided by 2 because as we recurse, we have two `heapPointWriter` as maximum, so they
should not hold more than half of the `maxPointsSortInHeap`.

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