NeoVim getting slower when choose colorscheme

• I am on the latest Hyper.app version

• I have searched the issues of this repo and believe that this is not a duplicate

• OS version and name: 22.04.1 LTS (Jammy Jellyfish) Ubuntu Linux

• Hyper.app version: 3.3.0

• Link of a Gist with the contents of your .hyper.js: https://gist.github.com/pandasoli/837841a09c0f44ffb75bb906bc0380d0.js

• Relevant information from devtools (CMD+ALT+I on macOS, CTRL+SHIFT+I elsewhere): CTRL+SHIFT+I

• The issue is reproducible in vanilla Hyper.app: Is Vanilla

Issue

I was moving on to NeoVim and when I chose any colorscheme (except the default, and including the other default color schemes), it makes NeoVim very slow and difficult to code.
But it's not a NeoVim issue, 'cause when I tried to run it in the standard Linux terminal NeoVim ran normally.
I really don't know what could be the problem, but hope you fix it.

Here is a video:

Start by reproducing the slowdown in Hyper 3.3.0 on Ubuntu 22.04 with NeoVim and a non-default colorscheme, then compare it with the standard Linux terminal. Use the linked .hyper.js gist and video as supporting evidence; done means identifying the Hyper-specific cause and confirming that NeoVim remains responsive with those colorschemes.