Re: A "Via Pascal" Modula 2 Compiler ?

"Marco van de Voort" <marcov@[EMAIL PROTECTED]
> wrote in message 
news:slrnerhekg.2cuj.marcov@[EMAIL PROTECTED]
>
>> which ran concurrently with the compiler, possibly.. although iirc the
>> speed of turbo pascal was pretty amazing !
>
> Several reasons:
> - only compiles what is needed.
> - compiler in asm, everything integrated and tuned, no unnecessary 
> conversions (e.g.
>   above tree -> assembler code -> machine code isn't done).
> - parser handcoded/optimized, limited nr of p***** because language is
> basically ll(1)
> - no optimization beyond instruction selection (this hurts quite bad,
FPC 
> is nearly twice as slow with
>  optimization), less levels of abstraction and describing datastructures
>  needed.

More reasons - the speed of producing the 'executable' with the original 
versions of TP was helped by the fact that it was only capable of
producing 
MS-DOS COM files (not EXE files). There was no additional processing step 
required for relocation, linking etc. The tradeoff was the 64Kb limit to
the 
size of the resulting program and no ability to link in pre-compiled OBJ 
files, or library LIB files..

--
Chris Burrows
CFB Software
http://www.cfbsoftware.com/gpcp