public void clear() {
      totalNumberOfBatches = 0;
      evaluationSimple = 0;
      evaluationOptimized = 0;
      batchesReadFromSpill = 0;
      batchesWrittenToSpill = 0;
      durationMs = 0;
    }
Time spent with processing the partition. This is mainly the time frame of finishPartition
method.
ql/src/java/org/apache/hadoop/hive/ql/exec/vector/ptf/VectorPTFGroupBatches.java