Well, I don't know guys how it works for you in 3seconds
....
Definitely not the computer or the Win is the problem but the IDE
Just measured it:
First compile empty sketch: 12 sec, after that less than 1 sec.
SSD: Samsung SSD 850 EVO 250GB
System : i5 3570K @ 3.4 GHz, Win 7 Ultimate, 8 GB
and ...let me add another 30 years
Now, a sketch (with reasonable code lenght) compilation will take about 20s on the I7 system and more than 50s on 3GHz/2GB RAM/WIN XP
I will complain until the Arduino IDE creators will understand the crap they did...
You told us in post #5 a much longer time for a blank sketch ?
Anyway, how often do you execute this first compile ?
Once a day ? 2, 3 ?