MATE Menu Delay
One of the mysteries that has annoyed me with MATE is an excessive delay when first using the panel menu. There is a noticeable delay with populating the MATE menu icons when browsing the menu the first time. I never found a remedy.
Part of the problem seems to be MATE not using a menu icon cache, instead depending upon system mime caches. Some nominal testing reveals part of the delay is related to LibreOffice icons. There is a noticeable pause in any menu containing LibreOffice icons.
The oddity is the delay occurs only during the first and second instance of using the MATE menu. After I browse the sub menus to force populating icons, the menu responds immediately thereafter. I can log out and log in and the menu works fine, as long as I originally performed those initial interactions.
The problem seems to affect the MATE menu applet more than the default dual panel menu layout with Applications, Places, System. I do not like dual panels and on a laptop that menu layout consumes too much space.
I really wish there was a solution.