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Re: gcc 3.5 integration branch proposal
On Jan 20, 2004, Geoffrey Keating <geoffk@apple.com> wrote:
> On 20/01/2004, at 2:11 PM, Alexandre Oliva wrote:
>> I don't see how making GCC faster on new machines wouldn't speed
>> things up on slower machines. Hmm... Except for refraining from
>> recomputing stuff over and over by setting aside some memory to hold
>> the computed value.
> Typically, on older, slower machines (eg. the mentioned 300Mhz
> StrongARM), memory accesses are relatively cheap relative to
> computation.
Which means not even the tuning for big-memory systems I suggested
would improve performance on newer hardware in detriment of older
hardware.
> Thus, on newer machines it's useful to perform some computation if
> this results in smaller final data structures, but this is not true
> on older machines.
But older machines generally have little memory too, so reducing data
structures can be good for them as well.
--
Alexandre Oliva Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Happy GNU Year! oliva@{lsd.ic.unicamp.br, gnu.org}
Red Hat GCC Developer aoliva@{redhat.com, gcc.gnu.org}
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