使用Db::table或者模型查询oracle数据时很慢

查询oracle数据库的时候：
使用Db::table或模型查询比较慢，接口查询100条记录并返回数据要4秒，不知道是为什么，使用原生查询就很快（毫秒级返回数据）

Db::table('lbd_customer')->where('rownum', '<=',100)->select();

但是查看SQL日志中的运行时间又是正常的：

[2021-10-22T17:48:26+08:00][sql] CONNECT:[ UseTime:0.300734s ] oci:dbname=//131.5.91.112:1521/orcl;charset=utf8

[2021-10-22T17:48:26+08:00][sql] select a.column_name,data_type,DECODE (nullable, 'Y', 0, 1) notnull,data_default, DECODE (A .column_name,b.column_name,1,0) pk from all_tab_columns a,(select column_name from all_constraints c, all_cons_columns col where c.constraint_name = col.constraint_name and c.constraint_type = 'P' and c.table_name = 'LBD_CUSTOMER' ) b where table_name = 'LBD_CUSTOMER' and a.column_name = b.column_name (+) [ RunTime:0.036455s ]

[2021-10-22T17:48:26+08:00][sql] SELECT * FROM (SELECT thinkphp.*, rownum AS numrow FROM (SELECT   * FROM lbd_customer WHERE  rownum <= '100') thinkphp ) [ RunTime:0.038436s ]

使用原生方式查询就很快：

Db::query("select * from lbd_customer where rownum<=:n", ['n' => 100]);

求大佬指点

No files or tests are named. Start by reproducing the difference between Db::table/model queries and Db::query against Oracle, then compare the ORM path with the SQL log shown in the issue. Done means identifying the cause of the delay and providing a verified fix or explanation.