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From: lsr@apple.UUCP (Larry Rosenstein)
Newsgroups: comp.lang.pascal
Subject: Re: Pascal
Message-ID: <279@apple.UUCP>
Date: Mon, 10-Nov-86 13:27:40 EST
Article-I.D.: apple.279
Posted: Mon Nov 10 13:27:40 1986
Date-Received: Mon, 10-Nov-86 21:42:44 EST
References: <1144@cit-vax.Caltech.Edu>
Reply-To: lsr@apple.UUCP (Larry Rosenstein)
Distribution: world
Organization: Advanced Development Group, Apple Computer
Lines: 34

In article <1144@cit-vax.Caltech.Edu> rs4u#@andrew.cmu.edu.UUCP (Rich Seigel) writes:
>
>I understand that Object Pascal can really slow down a compiler. A friend
>uses MPW (the Macintosh Programmer's Workshop, from Apple) at work, and he
>says that the regular Pascal compiles about as fast as TML, but the Object
>Pascal code compiles much more slowly...
>

There is no difference in compilation speed for regular Pascal constructs
and Object Pascal constructs.  There is nothing inherent in Object Pascal
that makes it slow to compile.

There are 2 possible reasons for thinking that Object Pascal is slow to
compile.  (1) The person was using it with MacApp, which has a large
interface section.  Much of the compiler's tiem is spent parsing
interfaces.  (2) The person was using the beta release of MPW which did not
support the $LOAD feature for Object Pascal.  $LOAD allows you to save
symbol tables in a binary format that are fast to load into the compiler.
This has been fixed in MPW 1.0.

Using the latest compiler, the turnaround time for a small change to a
MacApp progam is 2-3 minutes.  This is much slower than LSP, but much
faster than using the beta MPW compiler w/o $LOAD.


-- 
Larry Rosenstein

Object Specialist
Apple Computer

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