Re: Mi vs C

Jon,

I doubt that most of us that still mess with MI do it for efficiency.  It's 
more a labour of love, or a hobby (as with me), or simply nostalgia for the 
old Sys/38 days when "we could work anywhere in the country".

It's instructive to have some knowledge of MI just to be able to better 
understand what goes on under the covers.  But of course, I would not want 
to write in MI for hardly any practical purpose anymore.  Just to open a 
display file and do simple IO is a LOT of work!

Rich Hart

----- Original Message ----- 
From: "Jon Paris" <[email protected]>
To: <mi400-Zwy7GipZuJhWk0Htik3J/[email protected]>
Sent: Monday, December 10, 2007 12:48 PM
Subject: Re: [MI400] Mi vs C (was calling RPG ILE with parameter list 
fromMI)


>
> On 10-Dec-07, at 1:00 PM, James Lampert wrote:
>
>> My predecessors had already done
>> much to both optimize it and make it more readable, but I still
>> ended up
>> spending over a year going through it, one subroutine at a time, to
>> optimize it for space, speed, and maintainability.
>
> This got me thinking.  Has anyone here done any tests to compare the
> execution speed of MI programs vs comparable C programs?  IBM doesn't
> write in MI any more and by sticking with MI you lose most of the
> optimization options that are available to ILE programs.  The vast
> majority of MI instructions are surfaced in the C compiler and if I
> recall correctly are not called as functions (as they would be if
> called from RPG) but replaced by in-line code streams which should be
> a lot more efficient.
>
> C code has to be a lot more maintainable than MI and there are many
> more tools to work with it.
>
> SO is there really any reason to use MI for new code?  Does it really
> perform any better?
>
> Jon Paris
>
> www.Partner400.com
> www.SystemiDeveloper.com
>
>
> _______________________________________________
> This is the MI Programming on the AS400 / iSeries (MI400) mailing list
> To post a message email: MI400-Zwy7GipZuJhWk0Htik3J/[email protected]
> To subscribe, unsubscribe, or change list options,
> visit: http://lists.midrange.com/mailman/listinfo/mi400
> or email: MI400-request-Zwy7GipZuJhWk0Htik3J/[email protected]
> Before posting, please take a moment to review the archives
> at http://archive.midrange.com/mi400.
>
> 

_______________________________________________
This is the MI Programming on the AS400 / iSeries (MI400) mailing list
To post a message email: MI400-Zwy7GipZuJhWk0Htik3J/[email protected]
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/mi400
or email: MI400-request-Zwy7GipZuJhWk0Htik3J/[email protected]
Before posting, please take a moment to review the archives
at http://archive.midrange.com/mi400.