[TD-3747]enhance performance on win

src/client/src/tscParseInsert.c

@@ -705,19 +705,11 @@ static int32_t doParseInsertStatement(SSqlCmd* pCmd, char **str, STableDataBlock
   }
 
   code = TSDB_CODE_TSC_INVALID_SQL;
-  char  *tmpTokenBuf = calloc(1, 16*1024);  // used for deleting Escape character: \\, \', \"
-  if (NULL == tmpTokenBuf) {
-    return TSDB_CODE_TSC_OUT_OF_MEMORY;
-  }
+  char tmpTokenBuf[16*1024] = {0};  // used for deleting Escape character: \\, \', \"
 
   int32_t numOfRows = 0;
   code = tsParseValues(str, dataBuf, maxNumOfRows, pCmd, &numOfRows, tmpTokenBuf);
 
-  free(tmpTokenBuf);
-  if (code != TSDB_CODE_SUCCESS) {
-    return code;
-  }
-
   for (uint32_t i = 0; i < dataBuf->numOfParams; ++i) {
     SParamInfo *param = dataBuf->params + i;
     if (param->idx == -1) {