gfortran 8.2.1 produces large object files

I tested a simple piece of fortran code,

       MODULE Mytest
             TYPE MY_DATA
                 SEQUENCE
                 integer :: A(1000, 1000)
                 REAL :: B(1000, 1000)
             END TYPE MY_DATA
      END MODULE Mytest

Compiled using gfortran. In the case of gcc version 8.2.1 20180905 (Red Hat 8.2.1-3) (GCC) The generated object file size is 8001824 bytes and .mod is 1009 bytes. However when I tried gcc version 4.8.5 20150623 (Red Hat 4.8.5-39) (GCC) The generated object file size is only 936 bytes, and .mod is 1439 bytes.

Looks like the size of user-defined type is added to the object file in the case of gcc 8.2.1. I am new to the fortran, not sure what is going on. Is it possible to reduce the size of object file in gcc 8.2.1? Please help, thanks in advance.