How to manage the startup of all of the apps,without installing an app?

[Maq Attaq]

Hi,
I would like to know,if there is an in-built startup manager in the Marshmallow stock ROM and if there is,how can I access it,because I don't want to use an additional app to manage the startup of the apps!
p.s My device is Samsung Galaxy S5 Duos
running on the official Android 6.0.1 OS.
Thanks in advance!
Best regards!

 

[N4Newbie]

What are you trying to manage and why?

 

[Maq Attaq]

Dear N4Newbie,
I want to prevent the startup of some apps,to make the phone's booting time shorter, to increase the free RAM memory and to prevent the overheating of the CPU mostly!