Why is uLauncher's file-search extension so slow?

Ok, after some searching I found these lines:

        """ Searches for Files using fd command """
        cmd = [
            'timeout', '5s', 'ionice', '-c', '3', bin_name, '--threads', '1',
            '--hidden'
        ]

The repo is archived and the extension seems to not be maintained anymore. I removed the 'timeout', '5s' part in my ~/.local/share/ulauncher/extensions/com.github.brpaz.ulauncher-file-search/main.py.

PS: I am still using ulauncher because I want to have a light-weight application launcher and file/directory search in one. Basically, a Krunner for budgie.