Merge pull request #6013 in CORE/base-third from final/11.0 to persist/11.0

* commit '14eb90a23c8fd6eef259cac29f63591153b08009':
  BI-105913 BI导出变慢，按照10.0修改的方法改一下
  BI-105913 BI导出性能问题,valueof的性能比较低,大数据量会比较慢，这是之前10.0定制的内容，修改一下
  REPORT-71241 大数据集导出变慢

fine-poi/src/main/java/com/fr/third/v2/org/apache/poi/xssf/usermodel/XSSFSheet.java

@@ -174,6 +174,7 @@ public class XSSFSheet extends POIXMLDocumentPart implements Sheet  {
     private SortedMap<String,XSSFTable> tables;
     private List<CellRangeAddress> arrayFormulas;
     private XSSFDataValidationHelper dataValidationHelper;
+    private int size;
 
     /**
      * Creates new XSSFSheet   - called by XSSFWorkbook to create a sheet from scratch.
@@ -408,21 +409,13 @@ public class XSSFSheet extends POIXMLDocumentPart implements Sheet  {
             // throw IllegalStateException if the argument CellRangeAddress intersects with
             // a multi-cell array formula defined in this sheet
             validateArrayFormulas(region);
-
-            // Throw IllegalStateException if the argument CellRangeAddress intersects with
-            // a merged region already in this sheet
-            validateMergedRegions(region);
         }
 
         CTMergeCells ctMergeCells = worksheet.isSetMergeCells() ? worksheet.getMergeCells() : worksheet.addNewMergeCells();
         CTMergeCell ctMergeCell = ctMergeCells.addNewMergeCell();
         ctMergeCell.setRef(region.formatAsString());
-        final int numMergeRegions=ctMergeCells.sizeOfMergeCellArray();
-
-        // also adjust the number of merged regions overall
-        ctMergeCells.setCount(numMergeRegions);
 
-        return numMergeRegions-1;
+        return ++this.size;
     }
 
     /**