On 1/11/06, L505 <[EMAIL PROTECTED]> wrote:
> As an experiment for CompactSysUtils project I started a while ago, I have
> used this
> opportunity to demonstrate why FPC should reorganize the FPC sysutils unit
> for better
> smartlinking (i.e. create just one more unit than just sysutils to take care
> of
> smartlinking).
>
> Many functions in the FPC sysutils unit do not rely on any finalization or
> initialization code.
>
> By simple copy and pasting some of the sysutils functions into a unit of my
> own,
> called CompactSysUtils, I have gotten the DLL down to 40KB which was
> previously 91KB
>
> Project files showing 40KB DLL versus 91KB DLL is here:
> http://z505.com/pascal/MD5Hash/MD5Hash_COMPARE.zip
>
> CompactUtils and CompactSysUtils project is here:
> https://opensvn.csie.org/pspcgi/psp-lib-1.5.0-devel/src/extras/CompactUtils/
>
> In order to compile the CompactUtils version in that zip file, you will need
> the
> latest copy of the compactutils.pas and compactsysutils.pas which is located
> on the
> SVN link above.
>
> Sometimes we don't worry so much about bloat like this since "today's
> processors are
> getting faster", but this one is a no brainer. There is no work to be done
> other than
> copy/paste functions and reorganize them such as I have done with
> CompactSysUtils
> project. I have also made notes about this before on the mailing lists, such
> as
> mentioning how the findpart function can be cut copied and pasted right out
> of the
> StrUtils unit so that no sysutils initialization and finalization is hauled
> in.
>
> Maybe people can learn from this with the lazarus project too - as I'm
> guessing some
> (not all) the reason lazarus exe's are so big is because or simple
> initialization/finalization bloat. Sure there are abstraction bloat that is
> incurred
> for multi-platform programming in SOME CASES, but I've just proved with above
> CompactUtils project that abstraction has nothing to do with the majority of
> the
> bloat in this case. Rather simple reorganization in this case, to cut the EXE
> and DLL
> in half (actually, *more* than half).
I totally agree. This is a must-have for a very serious compiler
release. I feel my cut-and-paste skills are getting too good
sometimes. :)
> So either I continue to maintain this compactutils project with my elite
> cutting/copying/pasting skills or the FPC team decides to reorganize sysutils
> at the
> distribution level (i.e. kill the compactutils project and just do it in the
> RTL
> itself). Also anyone wishing to participate in this compactutils project I
> started is welcome - I started it to gain smartlinking knowledge myself and
> I'm sure
> others could benefit from knowing more about smartlinking.
I fail short in knowledge about that here, but I know a good compiler
should only compile the stuff it requires in a unit and not the whole
unit. Delphi 3 was dong that.
--
Alexandre Leclerc
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