Slow Font Change in Emacs

As the title implies my emacs would always take its sweet time changing the font from courier 12 (default) to adobe-courier--...20 *** etc. Apparently, it's much quicker if you keep that option out of .emacs and create an alias with a -font option. E.g.

• alias emacs='emacs -font -adobe-courier-bold-r-*-*-20-*-*-*-*-*-*-*'
  

Graças a Deus!