Byte Compile Question

Byte Compile Question

[Perry Smith]

Hi,

I have the belief that byte compiling only helps with loading files and that once they are loaded, the code will execute at the same speed.

Is that correct?

Byte compiling all my personal files is a bit awkward for a couple of reasons.  I considering not doing it any more but wanted to know all the tradeoffs.

If you can, please CC me on your replies.

Thank you,
Perry Smith

Re: Byte Compile Question

[Christopher Schmidt]

[-- Attachment #1: Type: text/plain, Size: 637 bytes --]

Perry Smith <pedzsan@gmail.com> writes:
> I have the belief that byte compiling only helps with loading files
> and that once they are loaded, the code will execute at the same
> speed.
>
> Is that correct?

No.  Check (info "(elisp)Byte Compilation").

> Byte compiling all my personal files is a bit awkward for a couple of
> reasons.  I considering not doing it any more but wanted to know all
> the tradeoffs

Give it a try.  Your code executes faster and the compiler warnings are
useful in most cases.

You can implement automatic byte compilation by customising
load-source-file-function.  Here is my auto-compile implementation.

[-- Attachment #2: auto-compile.el --]
[-- Type: application/emacs-lisp, Size: 2983 bytes --]

[-- Attachment #3: Type: text/plain, Size: 21 bytes --]


        Christopher

RE: Byte Compile Question

[Drew Adams]

> You can implement automatic byte compilation by customising
> load-source-file-function.  Here is my auto-compile implementation.

See also command `byte-recompile-directory'.

Re: Byte Compile Question

[Pascal J. Bourguignon]

Perry Smith <pedzsan@gmail.com> writes:

> Hi,
>
> I have the belief that byte compiling only helps with loading files
> and that once they are loaded, the code will execute at the same
> speed.
>
> Is that correct?

No.  It will make your code run faster.


> Byte compiling all my personal files is a bit awkward for a couple of
> reasons.  I considering not doing it any more but wanted to know all
> the tradeoffs.

Indeed.  One problem with that is usually those personal files change
often, so you would have to recompile them often.  But you can
automatize this recompiling so it may not be a big problem.
Personnally, I have a fast enough computer, so I don't bother with
compiling my files.



-- 
__Pascal Bourguignon__                     http://www.informatimago.com/
A bad day in () is better than a good day in {}.

Re: Byte Compile Question

[Xah Lee]

byte-compile elisp buffer on save, only if a byte-compiled file
exists.

(defun byte-compile-current-buffer ()
  "`byte-compile' current buffer if it's emacs-lisp-mode and compiled
file exists."
  (interactive)
  (when (and (eq major-mode 'emacs-lisp-mode)
             (file-exists-p (byte-compile-dest-file buffer-file-
name)))
    (byte-compile-file buffer-file-name)))

(add-hook 'after-save-hook 'byte-compile-current-buffer)

code part from Adolfo Benedetti.

some other tips:

〈Organize Your “dot emacs” Init File in 5 Minutes〉
http://ergoemacs.org/emacs/organize_your_dot_emacs.html

btw, there's lots alternatives on emacswiki.

 Xah

On Jul 27, 7:44 am, Perry Smith <pedz...@gmail.com> wrote:
> Hi,
>
> I have the belief that byte compiling only helps with loading files and that once they are loaded, the code will execute at the same speed.
>
> Is that correct?
>
> Byte compiling all my personal files is a bit awkward for a couple of reasons.  I considering not doing it any more but wanted to know all the tradeoffs.
>
> If you can, please CC me on your replies.
>
> Thank you,
> Perry Smith