Re: optimizing compiler against average assembly programmer.

Charles Fiterman <cef@geodseic.com> writes:
This is my first time posting to this news group but I felt I had to
respond to this thread, so here goes.


> Third he has the compiler produce assembly for those small
> sections of code.
>
> Fourth he hand tunes them looking for tiny improvements over
> the machine generated code.


This can lead to fast slow code, as opposed to fast fast code. When
optimizing a human optimizer should not think like a compiler. i.e.,
There is little gain in tweaking a few instructions. If the algorithm
is slow, the tweaked assembly code is still probably going to be slow.


> The human wins because he can use the machine.


The human wins because s/he knows what the code is supposed to be
doing. S/he can change the algorithm, knows how the system works to
remove i/o related slow down etc.


cheers
Dan
--

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