Ubuntu 20.04 lags when extensions using GLib spawn command with pgrep

When I was on 19.10 with GNOME 3.34 I could spawn command with GLib so many times without causing any lag to the GNOME shell or any app. But on 20.04 with GNOME 3.36.1 even a simple spawn command can create some lags for entire GNOME shell and even apps.

To show you how I do it, I've created this simple GNOME shell extension:

const Mainloop = imports.mainloop;
const GLib = imports.gi.GLib;

let timeout;

function init(){
}

function enable(){
    timeout = Mainloop.timeout_add_seconds(1.0,() => {
      var [ok, out, err, exit] = GLib.spawn_command_line_sync('pgrep Discord');
      log('Discord is running');
      return true;
    });
}

function disable(){
    Mainloop.source_remove(timeout);
}

Why is that lag happening? how can I fix the lag issue on this code?