diff --git a/src/client/src/tscBulkWrite.c b/src/client/src/tscBulkWrite.c
index b9993036599014af3a4dac63599dde3f265e7838..57c99c814f287002721ea9a724f7702764010f48 100644
--- a/src/client/src/tscBulkWrite.c
+++ b/src/client/src/tscBulkWrite.c
@@ -251,8 +251,8 @@ _error:
   tscError("send async batch sql obj failed, reason: %s", tstrerror(code));
 
   // handling the failures.
-  for (int i = 0; i < taosArrayGetSize(statements); ++i) {
-    SSqlObj* item = *((SSqlObj**)taosArrayGet(statements, i));
+  for (size_t i = 0; i < taosArrayGetSize(statements); ++i) {
+    SSqlObj* item = taosArrayGetP(statements, i);
     tscReturnsError(item, code);
   }
 }
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index aa28d01e5a764f9665c97792afd31056dc4d5174..10f8589d5dccd138b3cceb41815d1db652a03bd5 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -2316,7 +2316,7 @@ static size_t writeSSubmitBlkBuilder(SSubmitBlkBuilder* builder, SSubmitBlk* tar
   uint32_t dataLen = 0;
   taosArraySort(builder->rows, compareSMemRow);
   for (int i = 0; i < taosArrayGetSize(builder->rows); ++i) {
-    char* pRow = *(char**) (taosArrayGet(builder->rows, i));
+    char* pRow = taosArrayGetP(builder->rows, i);
     memcpy(POINTER_SHIFT(target->data, dataLen), pRow, memRowTLen(pRow));
     dataLen += memRowTLen(pRow);
   }
@@ -2920,9 +2920,11 @@ int32_t tscMergeTableDataBlocks(SSqlObj *pSql, SInsertStatementParam *pInsertPar
   initialSize = initialSize > 128 ? 128 : initialSize;
   
   void*     pVnodeDataBlockHashList = taosHashInit(initialSize, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BIGINT), true, false);
-  SArray*   pTableDataBlockList = taosArrayInit(taosHashGetSize(pInsertParam->pTableBlockHashList), POINTER_BYTES);
   SArray*   pVnodeDataBlockList = taosArrayInit(8, POINTER_BYTES);
-
+  
+  // speed up hash iteration.
+  SArray*   pTableDataBlockList = taosArrayInit(taosHashGetSize(pInsertParam->pTableBlockHashList), POINTER_BYTES);
+  
   STableDataBlocks** p = taosHashIterate(pInsertParam->pTableBlockHashList, NULL);
 
   STableDataBlocks* pOneTableBlock = *p;