react native expert expo

I am facing with an issue on the react native project.
if you have experience same issue before, you can do it within a minute :)
I am using ethers for this project because this is blockchain project.
the code is below.

import {ethers} from "ethers"
import "@ethersproject/shims"

but after import shims, suddenly emulator speed is very slow.
I have tried to figure out this issue, but no results.
so you should have experience in this issue before to solve this problem.
please bid if you are sure you can do it soon.