void testTimed() throws IOException {
      int lastRow = this.startRow + this.perClientRunRows;
      // Report on completion of 1/10th of total.
      for (int i = this.startRow; i < lastRow; i++) {
        testRow(i);
        if (status != null && i > 0 && (i % getReportingPeriod()) == 0) {
          status.setStatus(generateStatus(this.startRow, i, lastRow));
        }
      }
    }
Provides an extension point for tests that don't want a per row invocation.
hbase-rest/src/test/java/org/apache/hadoop/hbase/rest/PerformanceEvaluation.java