custom menu – OPTIMIZE QUERY!

hi..
i had an idea – developers should have an ability to set a constant i.e.

USE_STATIC_CUSTOM_MENU('menu_name') = true;

in general, output of custom_menus on front-end, takes long (sometimes 1 second)..
so, i think, that the custom-menu output should be saved as static string, and that should be outputed on FRONT_END request by visitors…
and that STATIC string should be changed/ updated every time the custom-menu is edited, or when any of that custom-menu’s item is modified…
i think, it will save huge resources over millions of sites/hosting..

p.s. of course, somehow, “current-menu-item” should be added while front-end request..
https://ww.wp.xz.cn/plugins/feature-request/