[GitHub] [pinot] klsince commented on pull request #10852: compress nullvector bitmap upon seal

[via GitHub]

klsince commented on PR #10852:
URL: https://github.com/apache/pinot/pull/10852#issuecomment-1577722022

   Thanks @Jackie-Jiang for the tips on validating this. 
   ```
   public static void main(String[] args) {
       MutableRoaringBitmap bitmap = new MutableRoaringBitmap();
       for (int i = 0; i < 18000000; i++) {
         bitmap.add(i);
       }
       System.out.println(bitmap.serializedSizeInBytes());
       bitmap.runOptimize();
       System.out.println(bitmap.serializedSizeInBytes());
   
       RoaringBitmapWriter<RoaringBitmap> bitmapWriter = 
RoaringBitmapWriter.writer().get();
       for (int i = 0; i < 18000000; i++) {
         bitmapWriter.add(i);
       }
       System.out.println(bitmapWriter.get().serializedSizeInBytes());
     }
   
   2255008
   3889
   3889
   ```


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