automatic byte compilation

[Andrea Crotti <andrea.crotti.0@gmail.com>]

I would like to always byte compile when possible, but I would also like
to avoid doing it manually.

I also have this alias
--8<---------------cut here---------------start------------->8---
alias emacs_compile="Emacs --batch -f batch-byte-compile *el"
--8<---------------cut here---------------end--------------->8---

Which is nice, but the best thing would be that whenever I load a file
- if there is the byte-compiled
  + if .el file is newer compile that and load it (maybe asking
  confirmation)
  + otherwise just load it

- if there isn't byte-compile and load it.

Why isn't it the default behaviour by the way?
Maybe it would take too long to load?

Are there any drawbacks in compiling?
For example now I have a problem with cedet/ecb, if I byte-compile I get
some strange errors, if I leave it as source everything works, what
could that be?

Thanks,
Andrea