type icon, font awesome performance

Hello,
i am using the type icon and when the icons are loaded from the icons.json it takes a long time.
Is it possible to improve the performance and that its not loading everything at once? This is with font-awesome icons.

[
                        'name' => __('Icon'),
                        'id' => CHILD_THEME_PREFIX . 'open_air_icon',
                        'type' => 'icon',
                        'icon_set' => 'font-awesome-pro',
                        'icon_file' => get_theme_file_path('assets/icons.json'),
                    ],

Greetings
Moritz