Re: Ada Timing Analysis

["Marin David Condic, 407.796.8997, M/S 731-93" <condicma@PWFL.COM>]

Philip Brashear <brashear@NS1.SW-ENG.FALLS-CHURCH.VA.US> wrote:
>Bob McIntire <bmcintir@csc.com> wrote:
>>
>>My question is, does any one have a reasonable number for the ratio of Ada
>>source to machine language statements??
>
>
>This ratio varies tremendously with the kind of statements and the particular
>compiler.  The Ada Compiler Evaluation System (ACES) produces massive amounts
>of data regarding code expansion.
>
    You will also find an *enormous* variation depending on the target
    machine. For example: VAX Ada83 (which I like very much) will
    generate pretty massive files in comparison to it's cousin, the
    XD-Ada83 compiler targeting the 1750a. The reason is simple: VAX
    Ada doesn't need to be terribly concerned with image size so they
    include more elaborate "support" (debugging stuff, more powerful
    run-time support, "optional" features, etc.) whereas the poor,
    little 1750a with it's 64kwords of memory (and operating in
    "real-time" as well) hasn't got any room to spare.

    There's nothing inherent in Ada that demands grossly large code.
    Pick your target, decide how important size is to you, then look
    for the best implementation for the job.

    MDC

Marin David Condic, Senior Computer Engineer    ATT:        407.796.8997
M/S 731-96                                      Technet:    796.8997
Pratt & Whitney, GESP                           Fax:        407.796.4669
P.O. Box 109600                                 Internet:   CONDICMA@PWFL.COM
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