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From: "John R. Strohm" <strohm@airmail.net>
Newsgroups: comp.lang.ada
Subject: Re: Speeding up Ada procedure?
Date: Thu, 27 Feb 2003 16:57:22 -0600
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Date: 2003-02-27T16:57:22-06:00
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"Mark Johnson" <mark_h_johnson@raytheon.com> wrote in message
news:3E5E32A2.DA8DDA1C@raytheon.com...
> Hmm. Have you tried measuring the performance of the routines in
> question? I have found that my "intuition" (and others) fails to find
> the real problem area more often than not. An example of some code I had
> to fix was a Jovial to Ada translator. The developer knew that symbol
> lookup needed to be fast so did a pragma (Inline) to speed it up. When I
> fed a large file (say 3000 lines) with a lot of symbols, the program ran
> really slow (over two CPU days - never finished). A profile did not find
> the problem until I removed that pragma (Inline) and then 99.999...% of
> the CPU time was in that symbol lookup routine.
>  The lookup method was a linear search of an unsorted list!
> We changed it to a hash table & the CPU time for that one file went to
> less than 5 minutes.

Just out of curiosity, where was this?  GD/Fort Worth, by any chance?