runemacs.exe starts up almost instantaneously for me on a 5-year-old Dell laptop and Win10. Maybe two seconds from typing em.bat myfile.java to seeing my file presented and ready to edit.
I usually install Emacs on whatever platform I'm given: Windows, Linux, Mac. It's the only editor that I can use consistently across systems. Usually I copy my .emacs file as well, to get all my preferred mappings etc.
Do you use many Emacs packages? My Emacs dashboard on Windows says "120 packages loaded in 22.7 seconds". On a ThinkPad X230 running Linux, the same config starts in around 2 seconds.
I will say that 'runemacs -Q' on a few-years-old Dell desktop does start in about 2 seconds.
