Since Maya 2016, it launches with a set of at least 3 acwebbrowser.exe process. Besides all the fuss it creates in the task manager and resource hog it can be, it can also slow down Maya startup and shutdown times by more than 200%, up to 30 seconds each time! Those process are some chromium engines that connect to the web for different tasks, especially regarding registration. Quite a useless thing to wait for each time you start Maya if you ask me.
Messing with the install files is a bad idea as it will probably prevent Maya from launching, it’s much more easy to disable that beaviour by setting this simple environment variable MAYA_DISABLE_CLIC_IPM to 1.
If you have no internet connection or if you are in a huge studio with tons of artists using Maya, it will surely make a huge difference!
If you want to improve the shutdown time even more, set the other environment variable MAYA_DISABLE_CER to 1.
Each time Maya quits, it requests a connection to Amazon web services (AWS) for the Autodesk Customer Involvement Program, adding 30 seconds of stupidity in some worst cases.
If you are on Windows, you could also disable the console window that appears for each Maya instance. It’s a good debug tool so keep in mind that you’d may have to reenable it in case you encounter a problem, but I feel it is way more pleasant without that window polluting the workplace. To do that just set the environment variable MAYA_NO_CONSOLE_WINDOW to 1. There is no need for that on Linux or Mac because they have a real terminal.
And dont forget about my other article regarding the performance of the VP2 viewport with MAYA_DISABLE_VP2_WHEN_POSSIBLE.